Search | arXiv e-print repository

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"/> <meta name="viewport" content="width=device-width, initial-scale=1"/>  <link rel="apple-touch-icon" sizes="180x180" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/apple-touch-icon.png"> <link rel="icon" type="image/png" sizes="32x32" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-32x32.png"> <link rel="icon" type="image/png" sizes="16x16" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon-16x16.png"> <link rel="manifest" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/site.webmanifest"> <link rel="mask-icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/safari-pinned-tab.svg" color="#b31b1b"> <link rel="shortcut icon" href="https://static.arxiv.org/static/base/1.0.0a5/images/icons/favicon.ico"> <meta name="msapplication-TileColor" content="#b31b1b"> <meta name="msapplication-config" content="images/icons/browserconfig.xml"> <meta name="theme-color" content="#b31b1b">  <title>Search | arXiv e-print repository</title> <script defer src="https://static.arxiv.org/static/base/1.0.0a5/fontawesome-free-5.11.2-web/js/all.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/base/1.0.0a5/css/arxivstyle.css" /> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ messageStyle: "none", extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: { inlineMath: [ ['$','$'], ["\$","\$"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true, ignoreClass: '.*', processClass: 'mathjax.*' }, TeX: { extensions: ["AMSmath.js", "AMSsymbols.js", "noErrors.js"], noErrors: { inlineDelimiters: ["$","$"], multiLine: false, style: { "font-size": "normal", "border": "" } } }, "HTML-CSS": { availableFonts: ["TeX"] } }); </script> <script src='//static.arxiv.org/MathJax-2.7.3/MathJax.js'></script> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/notification.js"></script> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/bulma-tooltip.min.css" /> <link rel="stylesheet" href="https://static.arxiv.org/static/search/0.5.6/css/search.css" /> <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha256-k2WSCIexGzOj3Euiig+TlR8gA0EmPjuc79OEeY5L45g=" crossorigin="anonymous"></script> <script src="https://static.arxiv.org/static/search/0.5.6/js/fieldset.js"></script> <style> radio#cf-customfield_11400 { display: none; } </style> </head> <body> <header><a href="#main-container" class="is-sr-only">Skip to main content</a>  <div class="attribution level is-marginless" role="banner"> <div class="level-left"> <a class="level-item" href="https://cornell.edu/"><img src="https://static.arxiv.org/static/base/1.0.0a5/images/cornell-reduced-white-SMALL.svg" alt="Cornell University" width="200" aria-label="logo" /></a> </div> <div class="level-right is-marginless"><p class="sponsors level-item is-marginless"><span id="support-ack-url">We gratefully acknowledge support from<br /> the Simons Foundation, <a href="https://info.arxiv.org/about/ourmembers.html">member institutions</a>, and all contributors. <a href="https://info.arxiv.org/about/donate.html">Donate</a></span></p></div> </div>  <div class="identity level is-marginless"> <div class="level-left"> <div class="level-item"> <a class="arxiv" href="https://arxiv.org/" aria-label="arxiv-logo"> <img src="https://static.arxiv.org/static/base/1.0.0a5/images/arxiv-logo-one-color-white.svg" aria-label="logo" alt="arxiv logo" width="85" style="width:85px;"/> </a> </div> </div> <div class="search-block level-right"> <form class="level-item mini-search" method="GET" action="https://arxiv.org/search"> <div class="field has-addons"> <div class="control"> <input class="input is-small" type="text" name="query" placeholder="Search..." aria-label="Search term or terms" /> <p class="help"><a href="https://info.arxiv.org/help">Help</a> | <a href="https://arxiv.org/search/advanced">Advanced Search</a></p> </div> <div class="control"> <div class="select is-small"> <select name="searchtype" aria-label="Field to search"> <option value="all" selected="selected">All fields</option> <option value="title">Title</option> <option value="author">Author</option> <option value="abstract">Abstract</option> <option value="comments">Comments</option> <option value="journal_ref">Journal reference</option> <option value="acm_class">ACM classification</option> <option value="msc_class">MSC classification</option> <option value="report_num">Report number</option> <option value="paper_id">arXiv identifier</option> <option value="doi">DOI</option> <option value="orcid">ORCID</option> <option value="author_id">arXiv author ID</option> <option value="help">Help pages</option> <option value="full_text">Full text</option> </select> </div> </div> <input type="hidden" name="source" value="header"> <button class="button is-small is-cul-darker">Search</button> </div> </form> </div> </div>  <div class="container"> <div class="user-tools is-size-7 has-text-right has-text-weight-bold" role="navigation" aria-label="User menu"> <a href="https://arxiv.org/login">Login</a> </div> </div> </header> <main class="container" id="main-container"> <div class="level is-marginless"> <div class="level-left"> <h1 class="title is-clearfix"> Showing 1–50 of 96 results for author: <span class="mathjax">Arenholz, E</span> </h1> </div> <div class="level-right is-hidden-mobile">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> <div class="content"> <form method="GET" action="/search/cond-mat" aria-role="search"> Searching in archive <strong>cond-mat</strong>. <a href="/search/?searchtype=author&query=Arenholz%2C+E">Search in all archives.</a> <div class="field has-addons-tablet"> <div class="control is-expanded"> <label for="query" class="hidden-label">Search term or terms</label> <input class="input is-medium" id="query" name="query" placeholder="Search term..." type="text" value="Arenholz, E"> </div> <div class="select control is-medium"> <label class="is-hidden" for="searchtype">Field</label> <select class="is-medium" id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> </div> <div class="control"> <button class="button is-link is-medium">Search</button> </div> </div> <div class="field"> <div class="control is-size-7"> <label class="radio"> <input checked id="abstracts-0" name="abstracts" type="radio" value="show"> Show abstracts </label> <label class="radio"> <input id="abstracts-1" name="abstracts" type="radio" value="hide"> Hide abstracts </label> </div> </div> <div class="is-clearfix" style="height: 2.5em"> <div class="is-pulled-right"> <a href="/search/advanced?terms-0-term=Arenholz%2C+E&terms-0-field=author&size=50&order=-announced_date_first">Advanced Search</a> </div> </div> <input type="hidden" name="order" value="-announced_date_first"> <input type="hidden" name="size" value="50"> </form> <div class="level breathe-horizontal"> <div class="level-left"> <form method="GET" action="/search/"> <div style="display: none;"> <select id="searchtype" name="searchtype"><option value="all">All fields</option><option value="title">Title</option><option selected value="author">Author(s)</option><option value="abstract">Abstract</option><option value="comments">Comments</option><option value="journal_ref">Journal reference</option><option value="acm_class">ACM classification</option><option value="msc_class">MSC classification</option><option value="report_num">Report number</option><option value="paper_id">arXiv identifier</option><option value="doi">DOI</option><option value="orcid">ORCID</option><option value="license">License (URI)</option><option value="author_id">arXiv author ID</option><option value="help">Help pages</option><option value="full_text">Full text</option></select> <input id="query" name="query" type="text" value="Arenholz, E"> <ul id="abstracts"><li><input checked id="abstracts-0" name="abstracts" type="radio" value="show"> <label for="abstracts-0">Show abstracts</label></li><li><input id="abstracts-1" name="abstracts" type="radio" value="hide"> <label for="abstracts-1">Hide abstracts</label></li></ul> </div> <div class="box field is-grouped is-grouped-multiline level-item"> <div class="control"> <span class="select is-small"> <select id="size" name="size"><option value="25">25</option><option selected value="50">50</option><option value="100">100</option><option value="200">200</option></select> </span> <label for="size">results per page</label>. </div> <div class="control"> <label for="order">Sort results by</label> <span class="select is-small"> <select id="order" name="order"><option selected value="-announced_date_first">Announcement date (newest first)</option><option value="announced_date_first">Announcement date (oldest first)</option><option value="-submitted_date">Submission date (newest first)</option><option value="submitted_date">Submission date (oldest first)</option><option value="">Relevance</option></select> </span> </div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Arenholz%2C+E&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Arenholz%2C+E&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Arenholz%2C+E&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.03100">arXiv:2302.03100</a> <span> [<a href="https://arxiv.org/pdf/2302.03100">pdf</a>, <a href="https://arxiv.org/format/2302.03100">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/5.0141869">10.1063/5.0141869 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of Coherently Coupled Cation Spin Dynamics in an Insulating Ferrimagnetic Oxide </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Klewe%2C+C">C. Klewe</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Shoup%2C+J+E">J. E. Shoup</a>, <a href="/search/cond-mat?searchtype=author&query=Kons%2C+C">C. Kons</a>, <a href="/search/cond-mat?searchtype=author&query=Pogoryelov%2C+Y">Y. Pogoryelov</a>, <a href="/search/cond-mat?searchtype=author&query=Knut%2C+R">R. Knut</a>, <a href="/search/cond-mat?searchtype=author&query=Gray%2C+B+A">B. A. Gray</a>, <a href="/search/cond-mat?searchtype=author&query=Jeon%2C+H+-">H. -M. Jeon</a>, <a href="/search/cond-mat?searchtype=author&query=Howe%2C+B+M">B. M. Howe</a>, <a href="/search/cond-mat?searchtype=author&query=Karis%2C+O">O. Karis</a>, <a href="/search/cond-mat?searchtype=author&query=Suzuki%2C+Y">Y. Suzuki</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Arena%2C+D+A">D. A. Arena</a>, <a href="/search/cond-mat?searchtype=author&query=Emori%2C+S">S. Emori</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.03100v1-abstract-short" style="display: inline;"> Many technologically useful magnetic oxides are ferrimagnetic insulators, which consist of chemically distinct cations. Here, we examine the spin dynamics of different magnetic cations in ferrimagnetic NiZnAl-ferrite (Ni$_{0.65}$Zn$_{0.35}$Al$_{0.8}$Fe$_{1.2}$O$_4$) under continuous microwave excitation. Specifically, we employ time-resolved x-ray ferromagnetic resonance to separately probe Fe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.03100v1-abstract-full').style.display = 'inline'; document.getElementById('2302.03100v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.03100v1-abstract-full" style="display: none;"> Many technologically useful magnetic oxides are ferrimagnetic insulators, which consist of chemically distinct cations. Here, we examine the spin dynamics of different magnetic cations in ferrimagnetic NiZnAl-ferrite (Ni$_{0.65}$Zn$_{0.35}$Al$_{0.8}$Fe$_{1.2}$O$_4$) under continuous microwave excitation. Specifically, we employ time-resolved x-ray ferromagnetic resonance to separately probe Fe$^{2+/3+}$ and Ni$^{2+}$ cations on different sublattice sites. Our results show that the precessing cation moments retain a rigid, collinear configuration to within $\approx$2$^\circ$. Moreover, the effective spin relaxation is identical to within $<$10% for all magnetic cations in the ferrite. We thus validate the oft-assumed ``ferromagnetic-like'' dynamics in resonantly driven ferrimagnetic oxides, where the magnetic moments from different cations precess as a coherent, collective magnetization. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.03100v1-abstract-full').style.display = 'none'; document.getElementById('2302.03100v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Appl. Phys. Lett. 122, 132401 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.09183">arXiv:2111.09183</a> <span> [<a href="https://arxiv.org/pdf/2111.09183">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.jmmm.2022.169627">10.1016/j.jmmm.2022.169627 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Chiral Spin Bobbers in Exchange-Coupled Hard-Soft Magnetic Bilayers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+X">Xiaohang Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+T">Tieren Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Fang%2C+L">Lei Fang</a>, <a href="/search/cond-mat?searchtype=author&query=Fackler%2C+S">Sean Fackler</a>, <a href="/search/cond-mat?searchtype=author&query=Borchers%2C+J+A">Julie A. Borchers</a>, <a href="/search/cond-mat?searchtype=author&query=Kirby%2C+B+J">Brian J. Kirby</a>, <a href="/search/cond-mat?searchtype=author&query=Maranville%2C+B+B">Brian B. Maranville</a>, <a href="/search/cond-mat?searchtype=author&query=Lofland%2C+S+E">Samuel E. Lofland</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Ullah%2C+A">Ahsan Ullah</a>, <a href="/search/cond-mat?searchtype=author&query=Cui%2C+J">Jun Cui</a>, <a href="/search/cond-mat?searchtype=author&query=Skomski%2C+R">Ralph Skomski</a>, <a href="/search/cond-mat?searchtype=author&query=Takeuchi%2C+I">Ichiro Takeuchi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.09183v2-abstract-short" style="display: inline;"> The spin structure of exchange-coupled MnBi:Co-Fe bilayers is investigated by X-ray magnetic circular dichroism (XMCD), polarized neutron reflectometry (PNR), and micromagnetic simu-lations. The purpose of the present research is two-fold. First, the current search for new permanent-magnet materials includes hard-soft nanocomposites, and the analysis of coercivity mechanisms in these structures is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.09183v2-abstract-full').style.display = 'inline'; document.getElementById('2111.09183v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.09183v2-abstract-full" style="display: none;"> The spin structure of exchange-coupled MnBi:Co-Fe bilayers is investigated by X-ray magnetic circular dichroism (XMCD), polarized neutron reflectometry (PNR), and micromagnetic simu-lations. The purpose of the present research is two-fold. First, the current search for new permanent-magnet materials includes hard-soft nanocomposites, and the analysis of coercivity mechanisms in these structures is an important aspect of this quest. Second, topological micro-magnetic structures such as skyrmions have recently become of intense fundamental and applied research, for example in the context of spin-based electronics. We find that the magnetization reversal of the MnBi:Co-Fe bilayer structure involves a curling-type twisting of the magnetization in the film plane. This curling in the exchange-coupled hard-soft magnetic bilayers is reminiscent of chiral spin structures known as bobbers and, in fact, establishes a new type of skyrmionic spin structure. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.09183v2-abstract-full').style.display = 'none'; document.getElementById('2111.09183v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Magnetism and Magnetic Materials 560, 169627 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.15615">arXiv:2110.15615</a> <span> [<a href="https://arxiv.org/pdf/2110.15615">pdf</a>, <a href="https://arxiv.org/format/2110.15615">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/5.0076953">10.1063/5.0076953 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> State-resolved ultrafast charge and spin dynamics in [Co/Pd] multilayers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Guyader%2C+L+L">Lo茂c Le Guyader</a>, <a href="/search/cond-mat?searchtype=author&query=Higley%2C+D+J">Daniel J. Higley</a>, <a href="/search/cond-mat?searchtype=author&query=Pancaldi%2C+M">Matteo Pancaldi</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+T">Tianmin Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Z">Zhao Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Chase%2C+T">Tyler Chase</a>, <a href="/search/cond-mat?searchtype=author&query=Granitzka%2C+P+W">Patrick W. Granitzka</a>, <a href="/search/cond-mat?searchtype=author&query=Coslovich%2C+G">Giacomo Coslovich</a>, <a href="/search/cond-mat?searchtype=author&query=Lutman%2C+A+A">Alberto A. Lutman</a>, <a href="/search/cond-mat?searchtype=author&query=Dakovski%2C+G+L">Georgi L. Dakovski</a>, <a href="/search/cond-mat?searchtype=author&query=Schlotter%2C+W+F">William F. Schlotter</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Hellwig%2C+O">Olav Hellwig</a>, <a href="/search/cond-mat?searchtype=author&query=Lalieu%2C+M+L+M">Mark L. M. Lalieu</a>, <a href="/search/cond-mat?searchtype=author&query=Koopmans%2C+B">Bert Koopmans</a>, <a href="/search/cond-mat?searchtype=author&query=Reid%2C+A+H">Alexander H. Reid</a>, <a href="/search/cond-mat?searchtype=author&query=Bonetti%2C+S">Stefano Bonetti</a>, <a href="/search/cond-mat?searchtype=author&query=St%C3%B6hr%2C+J">Joachim St枚hr</a>, <a href="/search/cond-mat?searchtype=author&query=D%C3%BCrr%2C+H+A">Hermann A. D眉rr</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.15615v1-abstract-short" style="display: inline;"> We use transient absorption spectroscopy with circularly polarized x-rays to detect laser-excited hole states below the Fermi level and compare their dynamics with that of unoccupied states above the Fermi level in ferromagnetic [Co/Pd] multilayers. While below the Fermi level an instantaneous and significantly stronger demagnetization is observed, above the Fermi level the demagnetization is dela… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.15615v1-abstract-full').style.display = 'inline'; document.getElementById('2110.15615v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.15615v1-abstract-full" style="display: none;"> We use transient absorption spectroscopy with circularly polarized x-rays to detect laser-excited hole states below the Fermi level and compare their dynamics with that of unoccupied states above the Fermi level in ferromagnetic [Co/Pd] multilayers. While below the Fermi level an instantaneous and significantly stronger demagnetization is observed, above the Fermi level the demagnetization is delayed by 35+/-10 fs. This provides a direct visualization of how ultrafast demagnetization proceeds via initial spin-flip scattering of laser-excited holes to the subsequent formation of spin waves. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.15615v1-abstract-full').style.display = 'none'; document.getElementById('2110.15615v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 4 figures. The following article has been submitted to Applied Physics Letters. After it is published, it will be found at https://publishing.aip.org/resources/librarians/products/journals/</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.15199">arXiv:2010.15199</a> <span> [<a href="https://arxiv.org/pdf/2010.15199">pdf</a>, <a href="https://arxiv.org/format/2010.15199">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.102.165426">10.1103/PhysRevB.102.165426 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Orientation-dependent stabilization of MgCr$_2$O$_4$ spinel thin films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wen%2C+F">Fangdi Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">Mikhail Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+T">Tsung-Chi Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Terilli%2C+M">Michael Terilli</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">Jak Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.15199v1-abstract-short" style="display: inline;"> AB$_2$O$_4$ normal spinels with a magnetic B site can host a variety of magnetic and orbital frustrations leading to spin-liquid phases and field-induced phase transitions. Here we report the first epitaxial growth of (111)-oriented MgCr$_2$O$_4$ thin films. By characterizing the structural and electronic properties of films grown along (001) and (111) directions, the influence of growth orientati… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.15199v1-abstract-full').style.display = 'inline'; document.getElementById('2010.15199v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.15199v1-abstract-full" style="display: none;"> AB$_2$O$_4$ normal spinels with a magnetic B site can host a variety of magnetic and orbital frustrations leading to spin-liquid phases and field-induced phase transitions. Here we report the first epitaxial growth of (111)-oriented MgCr$_2$O$_4$ thin films. By characterizing the structural and electronic properties of films grown along (001) and (111) directions, the influence of growth orientation has been studied. Despite distinctly different growth modes observed during deposition, the comprehensive characterization reveals no measurable disorder in the cation distribution nor multivalency issue for Cr ions in either orientation. Contrary to a naive expectation, the (111) stabilized films exhibit a smoother surface and a higher degree of crystallinity than (001)-oriented films. The preference in growth orientation is explained within the framework of heteroepitaxial stabilization in connection to a significantly lower (111) surface energy. These findings open broad opportunities in the fabrication of 2D kagome-triangular heterostructures with emergent magnetic behavior inaccessible in bulk crystals. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.15199v1-abstract-full').style.display = 'none'; document.getElementById('2010.15199v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 102, 165426 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.03081">arXiv:2005.03081</a> <span> [<a href="https://arxiv.org/pdf/2005.03081">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.nanolett.0c01868">10.1021/acs.nanolett.0c01868 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sub-Nanosecond Spin-Transfer Torque in an Ensemble of Superparamagnetic-Like Nanomagnets </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Emori%2C+S">Satoru Emori</a>, <a href="/search/cond-mat?searchtype=author&query=Klewe%2C+C">Christoph Klewe</a>, <a href="/search/cond-mat?searchtype=author&query=Schmalhorst%2C+J">Jan-Michael Schmalhorst</a>, <a href="/search/cond-mat?searchtype=author&query=Krieft%2C+J">Jan Krieft</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Lim%2C+Y">Youngmin Lim</a>, <a href="/search/cond-mat?searchtype=author&query=Smith%2C+D+A">David A. Smith</a>, <a href="/search/cond-mat?searchtype=author&query=Sapkota%2C+A">Arjun Sapkota</a>, <a href="/search/cond-mat?searchtype=author&query=Srivastava%2C+A">Abhishek Srivastava</a>, <a href="/search/cond-mat?searchtype=author&query=Mewes%2C+C">Claudia Mewes</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+Z">Zijian Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Khodadadi%2C+B">Behrouz Khodadadi</a>, <a href="/search/cond-mat?searchtype=author&query=Elmkharram%2C+H">Hesham Elmkharram</a>, <a href="/search/cond-mat?searchtype=author&query=Heremans%2C+J+J">Jean J. Heremans</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Reiss%2C+G">Gunter Reiss</a>, <a href="/search/cond-mat?searchtype=author&query=Mewes%2C+T">Tim Mewes</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2005.03081v1-abstract-short" style="display: inline;"> Spin currents can exert spin-transfer torques on magnetic systems even in the limit of vanishingly small net magnetization, as is the case for antiferromagnets. Here, we experimentally show that a spin-transfer torque is operative in a material with weak, short-range magnetic order -- namely, a macroscopic ensemble of superparamagnetic-like Co nanomagnets. We employ element- and time-resolved X-ra… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.03081v1-abstract-full').style.display = 'inline'; document.getElementById('2005.03081v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.03081v1-abstract-full" style="display: none;"> Spin currents can exert spin-transfer torques on magnetic systems even in the limit of vanishingly small net magnetization, as is the case for antiferromagnets. Here, we experimentally show that a spin-transfer torque is operative in a material with weak, short-range magnetic order -- namely, a macroscopic ensemble of superparamagnetic-like Co nanomagnets. We employ element- and time-resolved X-ray ferromagnetic resonance (XFMR) spectroscopy to directly detect sub-ns dynamics of the Co nanomagnets, excited into precession with cone angle $\geq$0.003$^{\circ}$ by an oscillating spin current. XFMR measurements reveal that as the net moment of the ensemble decreases, the strength of the spin-transfer torque increases relative to those of magnetic field torques. Our findings point to spin-transfer torque as an effective way to manipulate the state of nanomagnet ensembles at sub-ns timescales. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.03081v1-abstract-full').style.display = 'none'; document.getElementById('2005.03081v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.14438">arXiv:2004.14438</a> <span> [<a href="https://arxiv.org/pdf/2004.14438">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.124.177601">10.1103/PhysRevLett.124.177601 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Strain-modulated Slater-Mott crossover of pseudospin-half square-lattice in (SrIrO3)1/ (SrTiO3)1 superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yang%2C+J">Junyi Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Hao%2C+L">Lin Hao</a>, <a href="/search/cond-mat?searchtype=author&query=Meyers%2C+D">Derek Meyers</a>, <a href="/search/cond-mat?searchtype=author&query=Dasa%2C+T">Tamene Dasa</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+L">Liubin Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Horak%2C+L">Lukas Horak</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Fabbris%2C+G">Gilberto Fabbris</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+Y">Yongseong Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Haskel%2C+D">Daniel Haskel</a>, <a href="/search/cond-mat?searchtype=author&query=Karapetrova%2C+J">Jenia Karapetrova</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+J">Jong-Woo Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Ryan%2C+P+J">Philip J. Ryan</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+H">Haixuan Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Batista%2C+C+D">Cristian D. Batista</a>, <a href="/search/cond-mat?searchtype=author&query=Dean%2C+M+P+M">Mark P. M. Dean</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+J">Jian Liu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.14438v1-abstract-short" style="display: inline;"> We report on the epitaxial strain-driven electronic and antiferromagnetic modulations of a pseudospin-half square lattice realized in superlattices of (SrIrO3)1/(SrTiO3)1. With increasing compressive strain, we find the low-temperature insulating behavior to be strongly suppressed with a corresponding systematic reduction of both the Neel temperature and the staggered moment. However, despite such… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.14438v1-abstract-full').style.display = 'inline'; document.getElementById('2004.14438v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.14438v1-abstract-full" style="display: none;"> We report on the epitaxial strain-driven electronic and antiferromagnetic modulations of a pseudospin-half square lattice realized in superlattices of (SrIrO3)1/(SrTiO3)1. With increasing compressive strain, we find the low-temperature insulating behavior to be strongly suppressed with a corresponding systematic reduction of both the Neel temperature and the staggered moment. However, despite such a suppression, the system remains weakly insulating above the Neel transition. The emergence of metallicity is observed under large compressive strain but only at temperatures far above the N茅el transition. These behaviors are characteristics of the Slater-Mott crossover regime, providing a unique experimental model system of the spin-half Hubbard Hamiltonian with a tunable intermediate coupling strength. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.14438v1-abstract-full').style.display = 'none'; document.getElementById('2004.14438v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 124, 177601 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.10939">arXiv:2004.10939</a> <span> [<a href="https://arxiv.org/pdf/2004.10939">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/sciadv.aay0114">10.1126/sciadv.aay0114 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Correlation-driven eightfold magnetic anisotropy in a two-dimensional oxide monolayer </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Cui%2C+Z">Zhangzhang Cui</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A+J">Alexander J. Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+H">Hua Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+H">Hui Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Dong%2C+Y">Yongqi Dong</a>, <a href="/search/cond-mat?searchtype=author&query=Gilbert%2C+D+A">Dustin A. Gilbert</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+J">Jingyuan Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Y">Yi-Sheng Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Ma%2C+J">Jiaji Ma</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+Z">Zhenpeng Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+J">Jinghua Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Xia%2C+J">Jing Xia</a>, <a href="/search/cond-mat?searchtype=author&query=Kirby%2C+B+J">Brian J. Kirby</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+H">Hanghui Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Zhai%2C+X">Xiaofang Zhai</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+Y">Yalin Lu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.10939v1-abstract-short" style="display: inline;"> Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications. The uniaxial anisotropy universally exhibited by two-dimensional magnets has only two stable spin directions, demanding 180 degrees spin switching between states. We demonstrate a novel eightfold anisotropy in magnetic SrRuO3 monolayers by inducing a spin reorientation in (SrRuO3)1/(S… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10939v1-abstract-full').style.display = 'inline'; document.getElementById('2004.10939v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.10939v1-abstract-full" style="display: none;"> Engineering magnetic anisotropy in two-dimensional systems has enormous scientific and technological implications. The uniaxial anisotropy universally exhibited by two-dimensional magnets has only two stable spin directions, demanding 180 degrees spin switching between states. We demonstrate a novel eightfold anisotropy in magnetic SrRuO3 monolayers by inducing a spin reorientation in (SrRuO3)1/(SrTiO3)N superlattices, in which the magnetic easy axis of Ru spins is transformed from uniaxial <001> direction (N = 1 and 2) to eightfold <111> directions (N = 3, 4 and 5). This eightfold anisotropy enables 71 and 109 degrees spin switching in SrRuO3 monolayers, analogous to 71 and 109 degrees polarization switching in ferroelectric BiFeO3. First-principle calculations reveal that increasing the SrTiO3 layer thickness induces an emergent correlation-driven orbital ordering, tuning spin-orbit interactions and reorienting the SrRuO3 monolayer easy axis. Our work demonstrates that correlation effects can be exploited to substantially change spin-orbit interactions, stabilizing unprecedented properties in two-dimensional magnets and opening rich opportunities for low-power, multi-state device applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.10939v1-abstract-full').style.display = 'none'; document.getElementById('2004.10939v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15+13 pages, 5+10 figures, including supplementary materials</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Sci. Adv. 6, eaay0114 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.12982">arXiv:2003.12982</a> <span> [<a href="https://arxiv.org/pdf/2003.12982">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Robust ferromagnetism in highly strained SrCoO3 thin films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yujia Wang</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+Q">Qing He</a>, <a href="/search/cond-mat?searchtype=author&query=Ming%2C+W">Wenmei Ming</a>, <a href="/search/cond-mat?searchtype=author&query=Du%2C+M">Mao-Hua Du</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+N">Nianpeng Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Cafolla%2C+C">Clodomiro Cafolla</a>, <a href="/search/cond-mat?searchtype=author&query=Fujioka%2C+J">Jun Fujioka</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Q">Qinghua Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+D">Ding Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+S">Shengchun Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Lyu%2C+Y">Yingjie Lyu</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+L">Lin Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Nan%2C+C">Cewen Nan</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Yoshinori Tokura</a>, <a href="/search/cond-mat?searchtype=author&query=Okamoto%2C+S">Satoshi Okamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+P">Pu Yu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.12982v2-abstract-short" style="display: inline;"> Epitaxial strain provides important pathways to control the magnetic and electronic states in transition metal oxides. However, the large strain is usually accompanied by a strong reduction of the oxygen vacancy formation energy, which hinders the direct manipulation of their intrinsic properties. Here using a post-deposition ozone annealing method, we obtained a series of oxygen stoichiometric Sr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.12982v2-abstract-full').style.display = 'inline'; document.getElementById('2003.12982v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.12982v2-abstract-full" style="display: none;"> Epitaxial strain provides important pathways to control the magnetic and electronic states in transition metal oxides. However, the large strain is usually accompanied by a strong reduction of the oxygen vacancy formation energy, which hinders the direct manipulation of their intrinsic properties. Here using a post-deposition ozone annealing method, we obtained a series of oxygen stoichiometric SrCoO3 thin films with the tensile strain up to 3.0%. We observed a robust ferromagnetic ground state in all strained thin films, while interestingly the tensile strain triggers a distinct metal to insulator transition along with the increase of the tensile strain. The persistent ferromagnetic state across the electrical transition therefore suggests that the magnetic state is directly correlated with the localized electrons, rather than the itinerant ones, which then calls for further investigation of the intrinsic mechanism of this magnetic compound beyond the double-exchange mechanism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.12982v2-abstract-full').style.display = 'none'; document.getElementById('2003.12982v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2002.10872">arXiv:2002.10872</a> <span> [<a href="https://arxiv.org/pdf/2002.10872">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-020-14631-3">10.1038/s41467-020-14631-3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Emergent electric field control of phase transformation in oxide superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yi%2C+D">Di Yi</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yujia Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Erve%2C+O+M+J+v+%27">Olaf M. J. van 't Erve</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+L">Liubin Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Yuan%2C+H">Hongtao Yuan</a>, <a href="/search/cond-mat?searchtype=author&query=Veit%2C+M+J">Michael J. Veit</a>, <a href="/search/cond-mat?searchtype=author&query=Balakrishnan%2C+P+P">Purnima P. Balakrishnan</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+Y">Yongseong Choi</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A">Alexander Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+H">Haixuan Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+P">Pu Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Jonker%2C+B+T">Berend T. Jonker</a>, <a href="/search/cond-mat?searchtype=author&query=Suzuki%2C+Y">Yuri Suzuki</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2002.10872v1-abstract-short" style="display: inline;"> Electric fields can transform materials with respect to their structure and properties, enabling various applications ranging from batteries to spintronics. Recently electrolytic gating, which can generate large electric fields and voltage-driven ion transfer, has been identified as a powerful means to achieve electric-field-controlled phase transformations. The class of transition metal oxides (T… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.10872v1-abstract-full').style.display = 'inline'; document.getElementById('2002.10872v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2002.10872v1-abstract-full" style="display: none;"> Electric fields can transform materials with respect to their structure and properties, enabling various applications ranging from batteries to spintronics. Recently electrolytic gating, which can generate large electric fields and voltage-driven ion transfer, has been identified as a powerful means to achieve electric-field-controlled phase transformations. The class of transition metal oxides (TMOs) provide many potential candidates that present a strong response under electrolytic gating. However, very few show a reversible structural transformation at room-temperature. Here, we report the realization of a digitally synthesized TMO that shows a reversible, electric-field-controlled transformation between distinct crystalline phases at room-temperature. In superlattices comprised of alternating one-unit-cell of SrIrO3 and La0.2Sr0.8MnO3, we find a reversible phase transformation with a 7% lattice change and dramatic modulation in chemical, electronic, magnetic and optical properties, mediated by the reversible transfer of oxygen and hydrogen ions. Strikingly, this phase transformation is absent in the constituent oxides, solid solutions and larger period superlattices. Our findings open up a new class of materials for voltage-controlled functionality. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2002.10872v1-abstract-full').style.display = 'none'; document.getElementById('2002.10872v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nat Commun 11, 902 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.05621">arXiv:1912.05621</a> <span> [<a href="https://arxiv.org/pdf/1912.05621">pdf</a>, <a href="https://arxiv.org/ps/1912.05621">ps</a>, <a href="https://arxiv.org/format/1912.05621">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.124.217201">10.1103/PhysRevLett.124.217201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Coherent transfer of spin angular momentum by evanescent spin waves within antiferromagnetic NiO </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Dabrowski%2C+M">Maciej Dabrowski</a>, <a href="/search/cond-mat?searchtype=author&query=Nakano%2C+T">Takafumi Nakano</a>, <a href="/search/cond-mat?searchtype=author&query=Burn%2C+D+M">David M. Burn</a>, <a href="/search/cond-mat?searchtype=author&query=Frisk%2C+A">Andreas Frisk</a>, <a href="/search/cond-mat?searchtype=author&query=Newman%2C+D+G">David G. Newman</a>, <a href="/search/cond-mat?searchtype=author&query=Klewe%2C+C">Christoph Klewe</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Q">Qian Li</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+M">Mengmeng Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Hesjedal%2C+T">Thorsten Hesjedal</a>, <a href="/search/cond-mat?searchtype=author&query=van+der+Laan%2C+G">Gerrit van der Laan</a>, <a href="/search/cond-mat?searchtype=author&query=Qiu%2C+Z+Q">Zi Q. Qiu</a>, <a href="/search/cond-mat?searchtype=author&query=Hicken%2C+R+J">Robert J. Hicken</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.05621v1-abstract-short" style="display: inline;"> Insulating antiferromagnets are efficient and robust conductors of spin current. To realise the full potential of these materials within spintronics, the outstanding challenges are to demonstrate scalability down to nanometric lengthscales and the transmission of coherent spin currents. Here, we report the coherent transfer of spin angular momentum by excitation of evanescent spin waves of GHz fre… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.05621v1-abstract-full').style.display = 'inline'; document.getElementById('1912.05621v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.05621v1-abstract-full" style="display: none;"> Insulating antiferromagnets are efficient and robust conductors of spin current. To realise the full potential of these materials within spintronics, the outstanding challenges are to demonstrate scalability down to nanometric lengthscales and the transmission of coherent spin currents. Here, we report the coherent transfer of spin angular momentum by excitation of evanescent spin waves of GHz frequency within antiferromagnetic NiO at room temperature. Using element-specific and phase-resolved x-ray ferromagnetic resonance, we probe the injection and transmission of ac spin current, and demonstrate that insertion of a few nanometre thick epitaxial NiO(001) layer between a ferromagnet and non-magnet can even enhance the flow of spin current. Our results pave the way towards coherent control of the phase and amplitude of spin currents at the nanoscale, and enable the realization of spin-logic devices and spin current amplifiers that operate at GHz and THz frequencies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.05621v1-abstract-full').style.display = 'none'; document.getElementById('1912.05621v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.07275">arXiv:1911.07275</a> <span> [<a href="https://arxiv.org/pdf/1911.07275">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acsami.9b18820">10.1021/acsami.9b18820 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Interfacial-Redox-Induced Tuning of Superconductivity in YBa$_{2}$Cu$_{3}$O$_{7-未}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Murray%2C+P+D">Peyton D. Murray</a>, <a href="/search/cond-mat?searchtype=author&query=Gilbert%2C+D+A">Dustin A. Gilbert</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A+J">Alexander J. Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Kirby%2C+B+J">Brian J. Kirby</a>, <a href="/search/cond-mat?searchtype=author&query=Hernandez-Maldonado%2C+D">David Hernandez-Maldonado</a>, <a href="/search/cond-mat?searchtype=author&query=Varela%2C+M">Maria Varela</a>, <a href="/search/cond-mat?searchtype=author&query=Brubaker%2C+Z+E">Zachary E. Brubaker</a>, <a href="/search/cond-mat?searchtype=author&query=Liyanage%2C+W+L+N+C">W. L. N. C. Liyanage</a>, <a href="/search/cond-mat?searchtype=author&query=Chopdekar%2C+R+V">Rajesh V. Chopdekar</a>, <a href="/search/cond-mat?searchtype=author&query=Taufour%2C+V">Valentin Taufour</a>, <a href="/search/cond-mat?searchtype=author&query=Zieve%2C+R+J">Rena J. Zieve</a>, <a href="/search/cond-mat?searchtype=author&query=Jeffries%2C+J+R">Jason R. Jeffries</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Takamura%2C+Y">Yayoi Takamura</a>, <a href="/search/cond-mat?searchtype=author&query=Borchers%2C+J+A">Julie A. Borchers</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+K">Kai Liu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.07275v1-abstract-short" style="display: inline;"> Solid state ionic approaches for modifying ion distributions in getter/oxide heterostructures offer exciting potentials to control material properties. Here we report a simple, scalable approach allowing for total control of the superconducting transition in optimally doped YBa$_{2}$Cu$_{3}$O$_{7-未}$ (YBCO) films via a chemically-driven ionic migration mechanism. Using a thin Gd capping layer of u… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.07275v1-abstract-full').style.display = 'inline'; document.getElementById('1911.07275v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.07275v1-abstract-full" style="display: none;"> Solid state ionic approaches for modifying ion distributions in getter/oxide heterostructures offer exciting potentials to control material properties. Here we report a simple, scalable approach allowing for total control of the superconducting transition in optimally doped YBa$_{2}$Cu$_{3}$O$_{7-未}$ (YBCO) films via a chemically-driven ionic migration mechanism. Using a thin Gd capping layer of up to 20 nm deposited onto 100 nm thick epitaxial YBCO films, oxygen is found to leach from deep within the YBCO. Progressive reduction of the superconducting transition is observed, with complete suppression possible for a sufficiently thick Gd layer. These effects arise from the combined impact of redox-driven electron doping and modification of the YBCO microstructure due to oxygen migration and depletion. This work demonstrates an effective ionic control of superconductivity in oxides, an interface induced effect that goes well into the quasi-bulk regime, opening up possibilities for electric field manipulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.07275v1-abstract-full').style.display = 'none'; document.getElementById('1911.07275v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ACS Applied Materials & Interfaces, 12, 4741-4748 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.03007">arXiv:1911.03007</a> <span> [<a href="https://arxiv.org/pdf/1911.03007">pdf</a>, <a href="https://arxiv.org/format/1911.03007">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.101.064420">10.1103/PhysRevB.101.064420 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Effect of strain on magnetic and orbital ordering of LaSrCrO$_3$/LaSrMnO$_3$ heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Koohfar%2C+S">Sanaz Koohfar</a>, <a href="/search/cond-mat?searchtype=author&query=Georgescu%2C+A+B">Alexandru B. Georgescu</a>, <a href="/search/cond-mat?searchtype=author&query=Hallsteinsen%2C+I">Ingrid Hallsteinsen</a>, <a href="/search/cond-mat?searchtype=author&query=Sachan%2C+R">Ritesh Sachan</a>, <a href="/search/cond-mat?searchtype=author&query=Roldan%2C+M+A">Manuel A. Roldan</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Kumah%2C+D+P">Divine P. Kumah</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.03007v2-abstract-short" style="display: inline;"> We investigate the effect of strain and film thickness on the orbital and magnetic properties of LaSrCrO$_3$ (LSCO)/LaSrMnO$_3$ (LSMO) heterostructures using bulk magnetometry, soft X-ray magnetic spectroscopy, first-principles density functional theory, high-resolution electron microscopy and X-ray diffraction. We observe an anti-parallel ordering of the magnetic moments between the ferromagnetic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.03007v2-abstract-full').style.display = 'inline'; document.getElementById('1911.03007v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.03007v2-abstract-full" style="display: none;"> We investigate the effect of strain and film thickness on the orbital and magnetic properties of LaSrCrO$_3$ (LSCO)/LaSrMnO$_3$ (LSMO) heterostructures using bulk magnetometry, soft X-ray magnetic spectroscopy, first-principles density functional theory, high-resolution electron microscopy and X-ray diffraction. We observe an anti-parallel ordering of the magnetic moments between the ferromagnetic LSMO layers and the LSCO spacers leading to a strain-independent ferromagnetic ground state of the LSCO/LSMO heterostructures for LSMO layers as thin as 2 unit cells. As the LSMO thickness is increased, a net ferromagnetic state is maintained, however, the average magnetic moment per Mn is found to be dependent on the magnitude of the substrate-induced strain. The differences in the magnetic responses are related to preferential occupation of the Mn $x^2-y^2$ (in-plane) d-orbitals for tensile strain and $3z^2-r^2$ (out-of-plane) orbitals under compressive strain leading to competing ferromagnetic and anti-ferromagnetic exchange interactions within the LSMO layers. These results underscore the relative contributions of orbital, structural and spin degree of freedom and their tunability in atomically-thin crystalline complex oxide layers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.03007v2-abstract-full').style.display = 'none'; document.getElementById('1911.03007v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 February, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 101, 064420 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1911.00100">arXiv:1911.00100</a> <span> [<a href="https://arxiv.org/pdf/1911.00100">pdf</a>, <a href="https://arxiv.org/format/1911.00100">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> </div> <p class="title is-5 mathjax"> Quantum spin liquids by geometric lattice design </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Asaba%2C+T">T. Asaba</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Q">Qinghua Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Pal%2C+B">B. Pal</a>, <a href="/search/cond-mat?searchtype=author&query=Middey%2C+S">S. Middey</a>, <a href="/search/cond-mat?searchtype=author&query=Kumar%2C+P+S+A">P. S. Anil Kumar</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+L">Lin Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Sarma%2C+D+D">D. D. Sarma</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Freeland%2C+J+W">J. W. Freeland</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+L">Lu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">J. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1911.00100v1-abstract-short" style="display: inline;"> On a lattice composed of triangular plaquettes where antiferromagnetic exchange interactions between localized spins cannot be simultaneously satisfied, the system becomes geometrically frustrated with magnetically disordered phases remarkably different from a simple paramagnet. Spin liquid belongs to one of these exotic states, in which a macroscopic degeneracy of the ground state gives rise to t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.00100v1-abstract-full').style.display = 'inline'; document.getElementById('1911.00100v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1911.00100v1-abstract-full" style="display: none;"> On a lattice composed of triangular plaquettes where antiferromagnetic exchange interactions between localized spins cannot be simultaneously satisfied, the system becomes geometrically frustrated with magnetically disordered phases remarkably different from a simple paramagnet. Spin liquid belongs to one of these exotic states, in which a macroscopic degeneracy of the ground state gives rise to the rich spectrum of collective phenomena. Here, we report on the discovery of a new magnetic state in the heterostructures derived from a single unit cell (111)-oriented spinel CoCr2O4 sandwiched between nonmagnetic Al2O3 spacers. The artificial quasi-two-dimensional material composed of three triangle and one kagome atomic planes shows a degree of magnetic frustration which is almost two orders of magnitude enlarged compared to the bulk crystals. Combined resonant X-ray absorption and torque magnetometry measurements confirm that the designer system exhibits no sign of spin ordering down to 30 mK, implying a possible realization of a quantum spin liquid state in the two dimensional limit. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1911.00100v1-abstract-full').style.display = 'none'; document.getElementById('1911.00100v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.08629">arXiv:1908.08629</a> <span> [<a href="https://arxiv.org/pdf/1908.08629">pdf</a>, <a href="https://arxiv.org/format/1908.08629">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevApplied.12.054044">10.1103/PhysRevApplied.12.054044 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Damping enhancement in coherent ferrite/insulating-paramagnet bilayers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wisser%2C+J+J">Jacob J. Wisser</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A+J">Alexander J. Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Gilbert%2C+D+A">Dustin A. Gilbert</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Klewe%2C+C">Christoph Klewe</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Suzuki%2C+Y">Yuri Suzuki</a>, <a href="/search/cond-mat?searchtype=author&query=Emori%2C+S">Satoru Emori</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.08629v2-abstract-short" style="display: inline;"> High-quality epitaxial ferrites, such as low-damping MgAl-ferrite (MAFO), are promising nanoscale building blocks for all-oxide heterostructures driven by pure spin current. However, the impact of oxide interfaces on spin dynamics in such heterostructures remains an open question. Here, we investigate the spin dynamics and chemical and magnetic depth profiles of 15-nm-thick MAFO coherently interfa… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.08629v2-abstract-full').style.display = 'inline'; document.getElementById('1908.08629v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.08629v2-abstract-full" style="display: none;"> High-quality epitaxial ferrites, such as low-damping MgAl-ferrite (MAFO), are promising nanoscale building blocks for all-oxide heterostructures driven by pure spin current. However, the impact of oxide interfaces on spin dynamics in such heterostructures remains an open question. Here, we investigate the spin dynamics and chemical and magnetic depth profiles of 15-nm-thick MAFO coherently interfaced with an isostructural $\approx$1-8-nm-thick overlayer of paramagnetic CoCr$_2$O$_4$ (CCO) as an all-oxide model system. Compared to MAFO without an overlayer, effective Gilbert damping in MAFO/CCO is enhanced by a factor of $>$3, irrespective of the CCO overlayer thickness. We attribute this damping enhancement to spin scattering at the $\sim$1-nm-thick chemically disordered layer at the MAFO/CCO interface, rather than spin pumping or proximity-induced magnetism. Our results indicate that damping in ferrite-based heterostructures is strongly influenced by interfacial chemical disorder, even if the thickness of the disordered layer is a small fraction of the ferrite thickness. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.08629v2-abstract-full').style.display = 'none'; document.getElementById('1908.08629v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Applied 12, 054044 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.07194">arXiv:1908.07194</a> <span> [<a href="https://arxiv.org/pdf/1908.07194">pdf</a>, <a href="https://arxiv.org/format/1908.07194">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.4.024413">10.1103/PhysRevMaterials.4.024413 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Unconventional crystal field splitting in non-centrosymmetric BaTiO$_3$ thin films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Song%2C+Y">Yang Song</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Wen%2C+F">Fangdi Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+R">Ruyi Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Pei%2C+Y">Yujuan Pei</a>, <a href="/search/cond-mat?searchtype=author&query=Bi%2C+J">Jiachang Bi</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+S+Y">Se Young Park</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">Jak. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.07194v1-abstract-short" style="display: inline;"> Understanding the crystal field splitting and orbital polarization in non-centrosymmetric systems such as ferroelectric materials is fundamentally important. In this study, taking BaTiO$_3$ (BTO) as a representative material we investigate titanium crystal field splitting and orbital polarization in non-centrosymmetric TiO$_6$ octahedra with resonant X-ray linear dichroism at Ti $L_{2,3}$-edge. Th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.07194v1-abstract-full').style.display = 'inline'; document.getElementById('1908.07194v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.07194v1-abstract-full" style="display: none;"> Understanding the crystal field splitting and orbital polarization in non-centrosymmetric systems such as ferroelectric materials is fundamentally important. In this study, taking BaTiO$_3$ (BTO) as a representative material we investigate titanium crystal field splitting and orbital polarization in non-centrosymmetric TiO$_6$ octahedra with resonant X-ray linear dichroism at Ti $L_{2,3}$-edge. The high-quality BaTiO$_3$ thin films were deposited on DyScO$_3$ (110) single crystal substrates in a layer-by-layer way by pulsed laser deposition. The reflection high-energy electron diffraction (RHEED) and element specific X-ray absorption spectroscopy (XAS) were performed to characterize the structural and electronic properties of the films. In sharp contrast to conventional crystal field splitting and orbital configuration ($d_{xz}$/$d_{yz}$ $<$ $d_{xy}$ $<$ $d_{3z^2-r^2}$ $<$ $d_{x^2-y^2}$ or $d_{xy}$ $<$ $d_{xz}$/$d_{yz}$ $<$ $d_{x^2-y^2}$ $<$ $d_{3z^2-r^2}$) according to Jahn-Teller effect, it is revealed that $d_{xz}$, $d_{yz}$, and $d_{xy}$ orbitals are nearly degenerate, whereas $d_{3z^2-r^2}$ and $d_{x^2-y^2}$ orbitals are split with an energy gap $\sim$ 100 meV in the epitaxial BTO films. The unexpected degenerate states $d_{xz}$/$d_{yz}$/$d_{xy}$ are coupled to Ti-O displacements resulting from competition between polar and Jahn-Teller distortions in non-centrosymmetric TiO$_6$ octhedra of BTO films. Our results provide a route to manipulate orbital degree of freedom by switching electric polarization in ferroelectric materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.07194v1-abstract-full').style.display = 'none'; document.getElementById('1908.07194v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 4, 024413 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.07785">arXiv:1907.07785</a> <span> [<a href="https://arxiv.org/pdf/1907.07785">pdf</a>, <a href="https://arxiv.org/format/1907.07785">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.5.064419">10.1103/PhysRevMaterials.5.064419 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Epitaxial stabilization of thin films of the frustrated Ge-based spinels </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Vasiukov%2C+D+M">Denis M. Vasiukov</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">Mikhail Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Wen%2C+F">Fangdi Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+L">Liang Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">Jak Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1907.07785v3-abstract-short" style="display: inline;"> Frustrated magnets can host numerous exotic many-body quantum and topological phenomena. GeNi$_2$O$_4$ is a three dimensional $S=1$ frustrated magnet with an unusual two-stage transition to the two-dimensional antiferromagnetic ground state, while GeCu$_2$O$_4$ is a high-pressure phase with a strongly tetragonally elongated spinel structure and magnetic lattice formed by $S=1/2$ CuO$_2$ linear cha… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.07785v3-abstract-full').style.display = 'inline'; document.getElementById('1907.07785v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.07785v3-abstract-full" style="display: none;"> Frustrated magnets can host numerous exotic many-body quantum and topological phenomena. GeNi$_2$O$_4$ is a three dimensional $S=1$ frustrated magnet with an unusual two-stage transition to the two-dimensional antiferromagnetic ground state, while GeCu$_2$O$_4$ is a high-pressure phase with a strongly tetragonally elongated spinel structure and magnetic lattice formed by $S=1/2$ CuO$_2$ linear chains with frustrated exchange interactions and exotic magnetic behavior. Here we report on the first thin-film epitaxial stabilization of these two compounds. Developed growth mode, surface morphology, crystal structure and copper valence state were characterized by in-situ reflection high-energy electron diffraction, atomic force microscopy, X-ray reflectivity, X-ray diffraction, X-ray photoelectron spectroscopy and resonant X-ray absorption spectroscopy. Our results pave an alternative route to the comprehensive investigation of the puzzling magnetic properties of these compounds and exploration of novel emergent features driven by strain. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.07785v3-abstract-full').style.display = 'none'; document.getElementById('1907.07785v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.00155">arXiv:1906.00155</a> <span> [<a href="https://arxiv.org/pdf/1906.00155">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-019-13280-5">10.1038/s41467-019-13280-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Coherent ac spin current transmission across an antiferromagnetic CoO insulator </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Q">Q. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+M">M. Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Klewe%2C+C">C. Klewe</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">A. T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Hou%2C+D">D. Hou</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+T+Y">T. Y. Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+N">N. Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Saitoh%2C+E">E. Saitoh</a>, <a href="/search/cond-mat?searchtype=author&query=Hwang%2C+C">C. Hwang</a>, <a href="/search/cond-mat?searchtype=author&query=Hicken%2C+R+J">R. J. Hicken</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+J">J. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Qiu%2C+Z+Q">Z. Q. Qiu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.00155v1-abstract-short" style="display: inline;"> The recent discovery of spin-current transmission through antiferromagnetic (AFM) insulating materials opens up unprecedented opportunities for fundamental physics and spintronics applications. The great mystery currently surrounding this topic is: how could THz AFM magnons mediate a GHz spin current? This mis-match of frequencies becomes particularly critical for the case of coherent ac spin-curr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.00155v1-abstract-full').style.display = 'inline'; document.getElementById('1906.00155v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.00155v1-abstract-full" style="display: none;"> The recent discovery of spin-current transmission through antiferromagnetic (AFM) insulating materials opens up unprecedented opportunities for fundamental physics and spintronics applications. The great mystery currently surrounding this topic is: how could THz AFM magnons mediate a GHz spin current? This mis-match of frequencies becomes particularly critical for the case of coherent ac spin-current, raising the fundamental question of whether a GHz ac spin-current can ever keep its coherence inside an AFM insulator and so drive the spin precession of another FM layer coherently? Utilizing element- and time-resolved x-ray pump-probe measurements on Py/Ag/CoO/Ag/Fe75Co25/MgO(001) heterostructures, we demonstrate that a coherent GHz ac spin current pumped by the permalloy (Py) ferromagnetic resonance (FMR) can transmit coherently across an antiferromagnetic CoO insulating layer to drive a coherent spin precession of the FM Fe75Co25 layer. Further measurement results favor thermal magnons rather than evanescent spin waves as the mediator of the coherent ac spin current in CoO. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.00155v1-abstract-full').style.display = 'none'; document.getElementById('1906.00155v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> 5265(2019) </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications 2019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.12024">arXiv:1905.12024</a> <span> [<a href="https://arxiv.org/pdf/1905.12024">pdf</a>, <a href="https://arxiv.org/format/1905.12024">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.nanolett.9b02159">10.1021/acs.nanolett.9b02159 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Emergent magnetic state in (111)-oriented quasi-two-dimensional spinel oxides </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Kirby%2C+B+J">B. J. Kirby</a>, <a href="/search/cond-mat?searchtype=author&query=Zhong%2C+Z">Zhicheng Zhong</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Pal%2C+B">B. Pal</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Middey%2C+S">S. Middey</a>, <a href="/search/cond-mat?searchtype=author&query=Freeland%2C+J+W">J. W. Freeland</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">J. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.12024v1-abstract-short" style="display: inline;"> We report on the emergent magnetic state of (111)-oriented CoCr2O4 ultrathin films sandwiched by Al2O3 in the quantum confined geometry. At the two-dimensional crossover, polarized neutron reflectometry reveals an anomalous enhancement of the total magnetization compared to the bulk value. Synchrotron x-ray magnetic circular dichroism (XMCD) demonstrates the appearance of long-range ferromagnetic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.12024v1-abstract-full').style.display = 'inline'; document.getElementById('1905.12024v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.12024v1-abstract-full" style="display: none;"> We report on the emergent magnetic state of (111)-oriented CoCr2O4 ultrathin films sandwiched by Al2O3 in the quantum confined geometry. At the two-dimensional crossover, polarized neutron reflectometry reveals an anomalous enhancement of the total magnetization compared to the bulk value. Synchrotron x-ray magnetic circular dichroism (XMCD) demonstrates the appearance of long-range ferromagnetic ordering of spins on both Co and Cr sublattices. Brillouin function analyses further corroborates that the observed phenomena are due to the strongly altered magnetic frustration, manifested by the onset of a Yafet-Kittel type ordering as the new ground state in the ultrathin limit, which is unattainable in the bulk. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.12024v1-abstract-full').style.display = 'none'; document.getElementById('1905.12024v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.01550">arXiv:1905.01550</a> <span> [<a href="https://arxiv.org/pdf/1905.01550">pdf</a>, <a href="https://arxiv.org/format/1905.01550">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> </div> <p class="title is-5 mathjax"> Interface-engineered hole doping in Sr2IrO4/LaNiO3 heterostructure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wen%2C+F">Fangdi Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Q">Qinghua Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Pal%2C+B">B. Pal</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Freeland%2C+J+W">J. W. Freeland</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">A. T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+L">Lin Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">J. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.01550v1-abstract-short" style="display: inline;"> The relativistic Mott insulator Sr2IrO4 driven by large spin-orbit interaction is known for the Jeff = 1/2 antiferromagnetic state which closely resembles the electronic structure of parent compounds of superconducting cuprates. Here, we report the realization of hole-doped Sr2IrO4 by means of interfacial charge transfer in Sr2IrO4/LaNiO3 heterostructures. X-ray photoelectron spectroscopy on Ir 4f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.01550v1-abstract-full').style.display = 'inline'; document.getElementById('1905.01550v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.01550v1-abstract-full" style="display: none;"> The relativistic Mott insulator Sr2IrO4 driven by large spin-orbit interaction is known for the Jeff = 1/2 antiferromagnetic state which closely resembles the electronic structure of parent compounds of superconducting cuprates. Here, we report the realization of hole-doped Sr2IrO4 by means of interfacial charge transfer in Sr2IrO4/LaNiO3 heterostructures. X-ray photoelectron spectroscopy on Ir 4f edge along with the X-ray absorption spectroscopy at Ni L2 edge confirmed that 5d electrons from Ir sites are transferred onto Ni sites, leading to markedly electronic reconstruction at the interface. Although the Sr2IrO4/LaNiO3 heterostructure remains non-metallic, we reveal that the transport behavior is no longer described by the Mott variable range hopping mode, but by the Efros-Shklovskii model. These findings highlight a powerful utility of interfaces to realize emerging electronic states of the Ruddlesden-Popper phases of Ir-based oxides. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.01550v1-abstract-full').style.display = 'none'; document.getElementById('1905.01550v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages including 3 figures and references</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1901.06406">arXiv:1901.06406</a> <span> [<a href="https://arxiv.org/pdf/1901.06406">pdf</a>, <a href="https://arxiv.org/format/1901.06406">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41567-018-0401-8">10.1038/s41567-018-0401-8 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evolution of charge order topology across a magnetic phase transition in cuprate superconductors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kang%2C+M">Mingu Kang</a>, <a href="/search/cond-mat?searchtype=author&query=Pelliciari%2C+J">Jonathan Pelliciari</a>, <a href="/search/cond-mat?searchtype=author&query=Frano%2C+A">Alex Frano</a>, <a href="/search/cond-mat?searchtype=author&query=Breznay%2C+N">Nicholas Breznay</a>, <a href="/search/cond-mat?searchtype=author&query=Schierle%2C+E">Enrico Schierle</a>, <a href="/search/cond-mat?searchtype=author&query=Weschke%2C+E">Eugen Weschke</a>, <a href="/search/cond-mat?searchtype=author&query=Sutarto%2C+R">Ronny Sutarto</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+F">Feizhou He</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+M">Mo Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+K">Keto Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Ruiz%2C+A">Alejandro Ruiz</a>, <a href="/search/cond-mat?searchtype=author&query=Hao%2C+Z">Zeyu Hao</a>, <a href="/search/cond-mat?searchtype=author&query=Lewin%2C+S">Sylvia Lewin</a>, <a href="/search/cond-mat?searchtype=author&query=Analytis%2C+J">James Analytis</a>, <a href="/search/cond-mat?searchtype=author&query=Krockenberger%2C+Y">Yoshiharu Krockenberger</a>, <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+H">Hideki Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Das%2C+T">Tanmoy Das</a>, <a href="/search/cond-mat?searchtype=author&query=Comin%2C+R">R. Comin</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1901.06406v2-abstract-short" style="display: inline;"> Charge order is now accepted as an integral constituent of cuprate high-temperature superconductors, one that is intimately related to other instabilities in the phase diagram including antiferromagnetism and superconductivity. Unlike nesting-induced Peierls-like density waves, the charge correlations in the CuO2 planes have been predicted to display a rich momentum space topology depending on the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.06406v2-abstract-full').style.display = 'inline'; document.getElementById('1901.06406v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1901.06406v2-abstract-full" style="display: none;"> Charge order is now accepted as an integral constituent of cuprate high-temperature superconductors, one that is intimately related to other instabilities in the phase diagram including antiferromagnetism and superconductivity. Unlike nesting-induced Peierls-like density waves, the charge correlations in the CuO2 planes have been predicted to display a rich momentum space topology depending on the detailed fermiology of the system. However, to date charge order has only been observed along the high-symmetry Cu-O bond directions. Here, using resonant soft X-ray scattering, we investigate the evolution of the full momentum space topology of charge correlations in Ln2CuO4 (Ln=Nd, Pr) as a function of intrinsic electron doping. We report that, upon electron doping the parent Mott insulator, charge correlations first emerge in a hitherto-unobserved form, with full (Cinf) rotational symmetry in momentum-space. At higher doping levels, the orientation of charge correlations is sharply locked to the Cu-O bond high-symmetry directions, restoring a more conventional bidirectional charge order with enhanced correlation lengths. Through charge susceptibility calculations, we closely reproduce the drastic evolution in the topology of charge correlations across an antiferromagnetic quantum phase transition, highlighting the interplay between spin and charge degrees of freedom in electron-doped cuprates. Finally, using the established link between charge correlations and the underlying fermiology, we propose a revised phase diagram of Ln2CuO4 with a superconducting region extending toward the Mott limit. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1901.06406v2-abstract-full').style.display = 'none'; document.getElementById('1901.06406v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 January, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to Nature Physics on April 20th, 2018. A revised version will appear in Nature Physics at 10.1038/s41567-018-0401-8</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Physics 15, 335-450 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.10794">arXiv:1811.10794</a> <span> [<a href="https://arxiv.org/pdf/1811.10794">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-019-13999-1">10.1038/s41467-019-13999-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electric-field Control of Magnetism with Emergent Topological Hall Effect in SrRuO3 through Proton Evolution </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhuolu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+S">Shengchun Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Tian%2C+Z">Zijun Tian</a>, <a href="/search/cond-mat?searchtype=author&query=Hwangbo%2C+K">Kyle Hwangbo</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+M">Meng Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yujia Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Bartram%2C+F+M">F. Michael Bartram</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+L">Liqun He</a>, <a href="/search/cond-mat?searchtype=author&query=Lyu%2C+Y">Yingjie Lyu</a>, <a href="/search/cond-mat?searchtype=author&query=Dong%2C+Y">Yongqi Dong</a>, <a href="/search/cond-mat?searchtype=author&query=Wan%2C+G">Gang Wan</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+H">Haobo Li</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+N">Nianpeng Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+H">Hua Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+Q">Qing He</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+L">Luyi Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+W">Weidong Luo</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+P">Pu Yu</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1811.10794v1-abstract-short" style="display: inline;"> Ionic substitution forms an essential pathway to manipulate the carrier density and crystalline symmetry of materials via ion-lattice-electron coupling, leading to a rich spectrum of electronic states in strongly correlated systems. Using the ferromagnetic metal SrRuO3 as a model system, we demonstrate an efficient and reversible control of both carrier density and crystalline symmetry through the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.10794v1-abstract-full').style.display = 'inline'; document.getElementById('1811.10794v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.10794v1-abstract-full" style="display: none;"> Ionic substitution forms an essential pathway to manipulate the carrier density and crystalline symmetry of materials via ion-lattice-electron coupling, leading to a rich spectrum of electronic states in strongly correlated systems. Using the ferromagnetic metal SrRuO3 as a model system, we demonstrate an efficient and reversible control of both carrier density and crystalline symmetry through the ionic liquid gating induced protonation. The insertion of protons electron-dopes SrRuO3, leading to an exotic ferromagnetic to paramagnetic phase transition along with the increase of proton concentration. Intriguingly, we observe an emergent topological Hall effect at the boundary of the phase transition as the consequence of the newly-established Dzyaloshinskii-Moriya interaction owing to the breaking of inversion symmetry in protonated SrRuO3 with the proton compositional film-depth gradient. We envision that electric-field controlled protonation opens a novel strategy to design material functionalities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.10794v1-abstract-full').style.display = 'none'; document.getElementById('1811.10794v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Comm. 11, 184 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.09773">arXiv:1811.09773</a> <span> [<a href="https://arxiv.org/pdf/1811.09773">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> The interfacial spin modulation of graphene on Fe(111) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hong%2C+J">J. Hong</a>, <a href="/search/cond-mat?searchtype=author&query=Hwang%2C+H+-">H. -N. Hwang</a>, <a href="/search/cond-mat?searchtype=author&query=NDiaye%2C+A+T">A. T. NDiaye</a>, <a href="/search/cond-mat?searchtype=author&query=Liang%2C+J">J. Liang</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+G">G. Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+Y">Y. Park</a>, <a href="/search/cond-mat?searchtype=author&query=Singh%2C+L+T">L. T. Singh</a>, <a href="/search/cond-mat?searchtype=author&query=Jung%2C+Y+G">Y. G. Jung</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+J+-">J. -H. Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Jeong%2C+J+-">J. -I. Jeong</a>, <a href="/search/cond-mat?searchtype=author&query=Schmid%2C+A+K">A. K. Schmid</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+H">H. Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Bokor%2C+J">J. Bokor</a>, <a href="/search/cond-mat?searchtype=author&query=Hwang%2C+C+-">C. -C. Hwang</a>, <a href="/search/cond-mat?searchtype=author&query=You%2C+L">L. You</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1811.09773v1-abstract-short" style="display: inline;"> When Fe, which is a typical ferromagnet using d- or f-orbital states, is combined with 2D materials such as graphene, it offers many opportunities for spintronics. The origin of 2D magnetism is from magnetic insulating behaviors, which could result in magnetic excitations and also proximity effects. However, the phenomena were only observed at extremely low temperatures. Fe and graphene interfaces… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.09773v1-abstract-full').style.display = 'inline'; document.getElementById('1811.09773v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.09773v1-abstract-full" style="display: none;"> When Fe, which is a typical ferromagnet using d- or f-orbital states, is combined with 2D materials such as graphene, it offers many opportunities for spintronics. The origin of 2D magnetism is from magnetic insulating behaviors, which could result in magnetic excitations and also proximity effects. However, the phenomena were only observed at extremely low temperatures. Fe and graphene interfaces could control spin structures in which they show a unique atomic spin modulation and magnetic coupling through the interface. Another reason for covering graphene on Fe is to prevent oxidation under ambient conditions. We investigated the engineering of spin configurations by growing monolayer graphene on an Fe(111) single crystal surface and observed the presence of sharply branched, 3D tree-like domain structures. Magnetization by a sweeping magnetic field (m-H) revealed that the interface showed canted magnetization in the in-plane (IP) orientation. Moreover, graphene could completely prevent the oxidation of the Fe surface. The results indicate possible control of the spin structures at the atomic scale and the interface phenomena in the 2D structure. The study introduces a new approach for room temperature 2D magnetism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.09773v1-abstract-full').style.display = 'none'; document.getElementById('1811.09773v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.08574">arXiv:1811.08574</a> <span> [<a href="https://arxiv.org/pdf/1811.08574">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.99.104401">10.1103/PhysRevB.99.104401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exploring interfacial exchange coupling and sublattice effect in heavy metal/ferrimagnetic insulator heterostructures using Hall measurements, x-ray magnetic circular dichroism, and neutron reflectometry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Shao%2C+Q">Qiming Shao</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A">Alexander Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Y">Yawen Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+G">Guoqiang Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+C">Chao-Yao Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Gilbert%2C+D+A">Dustin A. Gilbert</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Che%2C+X">Xiaoyu Che</a>, <a href="/search/cond-mat?searchtype=author&query=Tang%2C+C">Chi Tang</a>, <a href="/search/cond-mat?searchtype=author&query=Aldosary%2C+M">Mohammed Aldosary</a>, <a href="/search/cond-mat?searchtype=author&query=Navabi%2C+A">Aryan Navabi</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+Q+L">Qing Lin He</a>, <a href="/search/cond-mat?searchtype=author&query=Kirby%2C+B+J">Brian J. Kirby</a>, <a href="/search/cond-mat?searchtype=author&query=Shi%2C+J">Jing Shi</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+K+L">Kang L. Wang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1811.08574v2-abstract-short" style="display: inline;"> We use temperature-dependent Hall measurements to identify contributions of spin Hall, magnetic proximity, and sublattice effects to the anomalous Hall signal in heavy metal/ferrimagnetic insulator heterostructures with perpendicular magnetic anisotropy. This approach enables detection of both the magnetic proximity effect onset temperature and the magnetization compensation temperature and provid… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.08574v2-abstract-full').style.display = 'inline'; document.getElementById('1811.08574v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.08574v2-abstract-full" style="display: none;"> We use temperature-dependent Hall measurements to identify contributions of spin Hall, magnetic proximity, and sublattice effects to the anomalous Hall signal in heavy metal/ferrimagnetic insulator heterostructures with perpendicular magnetic anisotropy. This approach enables detection of both the magnetic proximity effect onset temperature and the magnetization compensation temperature and provides essential information regarding the interfacial exchange coupling. Onset of a magnetic proximity effect yields a local extremum in the temperature-dependent anomalous Hall signal, which occurs at higher temperature as magnetic insulator thickness increases. This magnetic proximity effect onset occurs at much higher temperature in Pt than W. The magnetization compensation point is identified by a sharp anomalous Hall sign change and divergent coercive field. We directly probe the magnetic proximity effect using x-ray magnetic circular dichroism and polarized neutron reflectometry, which reveal an antiferromagnetic coupling between W and the magnetic insulator. Finally, we summarize the exchange-coupling configurations and the anomalous Hall-effect sign of the magnetized heavy metal in various heavy metal/magnetic insulator heterostructures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.08574v2-abstract-full').style.display = 'none'; document.getElementById('1811.08574v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 99, 104401 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1811.03075">arXiv:1811.03075</a> <span> [<a href="https://arxiv.org/pdf/1811.03075">pdf</a>, <a href="https://arxiv.org/ps/1811.03075">ps</a>, <a href="https://arxiv.org/format/1811.03075">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.98.201115">10.1103/PhysRevB.98.201115 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Inverted orbital polarization in strained correlated oxide films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Rogge%2C+P+C">Paul C. Rogge</a>, <a href="/search/cond-mat?searchtype=author&query=Green%2C+R+J">Robert J. Green</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Fabbris%2C+G">Gilberto Fabbris</a>, <a href="/search/cond-mat?searchtype=author&query=Barbour%2C+A+M">Andi M. Barbour</a>, <a href="/search/cond-mat?searchtype=author&query=Lefler%2C+B+M">Benjamin M. Lefler</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Dean%2C+M+P+M">Mark P. M. Dean</a>, <a href="/search/cond-mat?searchtype=author&query=May%2C+S+J">Steven J. May</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1811.03075v1-abstract-short" style="display: inline;"> Manipulating the orbital occupation of valence electrons via epitaxial strain in an effort to induce new functional properties requires considerations of how changes in the local bonding environment affect the band structure at the Fermi level. Using synchrotron radiation to measure the x-ray linear dichroism of epitaxially strained films of the correlated oxide CaFeO3, we demonstrate that the orb… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.03075v1-abstract-full').style.display = 'inline'; document.getElementById('1811.03075v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1811.03075v1-abstract-full" style="display: none;"> Manipulating the orbital occupation of valence electrons via epitaxial strain in an effort to induce new functional properties requires considerations of how changes in the local bonding environment affect the band structure at the Fermi level. Using synchrotron radiation to measure the x-ray linear dichroism of epitaxially strained films of the correlated oxide CaFeO3, we demonstrate that the orbital polarization of the Fe valence electrons is opposite from conventional understanding. Although the energetic ordering of the Fe 3d orbitals is confirmed by multiplet ligand field theory analysis to be consistent with previously reported strain-induced behavior, we find that the nominally higher energy orbital is more populated than the lower. We ascribe this inverted orbital polarization to an anisotropic bandwidth response to strain in a compound with nearly filled bands. These findings provide an important counterexample to the traditional understanding of strain-induced orbital polarization and reveal a new method to engineer otherwise unachievable orbital occupations in correlated oxides. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1811.03075v1-abstract-full').style.display = 'none'; document.getElementById('1811.03075v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 November, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 98, 201115R (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1810.08327">arXiv:1810.08327</a> <span> [<a href="https://arxiv.org/pdf/1810.08327">pdf</a>, <a href="https://arxiv.org/format/1810.08327">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.121.236802">10.1103/PhysRevLett.121.236802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Meyers%2C+D">D. Meyers</a>, <a href="/search/cond-mat?searchtype=author&query=Nakatsukasa%2C+K">Ken Nakatsukasa</a>, <a href="/search/cond-mat?searchtype=author&query=Mu%2C+S">Sai Mu</a>, <a href="/search/cond-mat?searchtype=author&query=Hao%2C+L">Lin Hao</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+J">Junyi Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yue Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Fabbris%2C+G">G. Fabbris</a>, <a href="/search/cond-mat?searchtype=author&query=Miao%2C+H">Hu Miao</a>, <a href="/search/cond-mat?searchtype=author&query=Pelliciari%2C+J">J. Pelliciari</a>, <a href="/search/cond-mat?searchtype=author&query=McNally%2C+D">D. McNally</a>, <a href="/search/cond-mat?searchtype=author&query=Dantz%2C+M">M. Dantz</a>, <a href="/search/cond-mat?searchtype=author&query=Paris%2C+E">E. Paris</a>, <a href="/search/cond-mat?searchtype=author&query=Karapetrova%2C+E">E. Karapetrova</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+Y">Yongseong Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Haskel%2C+D">D. Haskel</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Schmitt%2C+T">Thorsten Schmitt</a>, <a href="/search/cond-mat?searchtype=author&query=Berlijn%2C+T">Tom Berlijn</a>, <a href="/search/cond-mat?searchtype=author&query=Johnston%2C+S">S. Johnston</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+J">Jian Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Dean%2C+M+P+M">M. P. M. Dean</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1810.08327v1-abstract-short" style="display: inline;"> We report the observation of multiple phonon satellite features in ultra thin superlattices of form $n$SrIrO$_3$/$m$SrTiO$_3$ using resonant inelastic x-ray scattering. As the values of $n$ and $m$ vary the energy loss spectra show a systematic evolution in the relative intensity of the phonon satellites. Using a closed-form solution for the cross section, we extract the variation in the electron-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1810.08327v1-abstract-full').style.display = 'inline'; document.getElementById('1810.08327v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1810.08327v1-abstract-full" style="display: none;"> We report the observation of multiple phonon satellite features in ultra thin superlattices of form $n$SrIrO$_3$/$m$SrTiO$_3$ using resonant inelastic x-ray scattering. As the values of $n$ and $m$ vary the energy loss spectra show a systematic evolution in the relative intensity of the phonon satellites. Using a closed-form solution for the cross section, we extract the variation in the electron-phonon coupling strength as a function of $n$ and $m$. Combined with the negligible carrier doping into the SrTiO$_3$ layers, these results indicate that tuning of the electron-phonon coupling can be effectively decoupled from doping. This work showcases both a feasible method to extract the electron-phonon coupling in superlattices and unveils a potential route for tuning this coupling which is often associated with superconductivity in SrTiO$_3$-based systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1810.08327v1-abstract-full').style.display = 'none'; document.getElementById('1810.08327v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 121, 236802 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.08728">arXiv:1809.08728</a> <span> [<a href="https://arxiv.org/pdf/1809.08728">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.2.104402">10.1103/PhysRevMaterials.2.104402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ionic Tuning of Cobaltites at the Nanoscale </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Gilbert%2C+D+A">Dustin A. Gilbert</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A+J">Alexander J. Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Murray%2C+P+D">Peyton D. Murray</a>, <a href="/search/cond-mat?searchtype=author&query=Chopdekar%2C+R+V">Rajesh V. Chopdekar</a>, <a href="/search/cond-mat?searchtype=author&query=Kane%2C+A+M">Alexander M. Kane</a>, <a href="/search/cond-mat?searchtype=author&query=Ionin%2C+A+L">Aleksey L. Ionin</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+M+S">Michael S. Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Spurgeon%2C+S+R">Steven R. Spurgeon</a>, <a href="/search/cond-mat?searchtype=author&query=Kirby%2C+B+J">Brian J. Kirby</a>, <a href="/search/cond-mat?searchtype=author&query=Maranville%2C+B+B">Brian B. Maranville</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Mehta%2C+A">Apurva Mehta</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+K">Kai Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Takamura%2C+Y">Yayoi Takamura</a>, <a href="/search/cond-mat?searchtype=author&query=Borchers%2C+J+A">Julie A. Borchers</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.08728v1-abstract-short" style="display: inline;"> Control of materials through custom design of ionic distributions represents a powerful new approach to develop future technologies ranging from spintronic logic and memory devices to energy storage. Perovskites have shown particular promise for ionic devices due to their high ion mobility and sensitivity to chemical stoichiometry. In this work, we demonstrate a solid-state approach to control of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.08728v1-abstract-full').style.display = 'inline'; document.getElementById('1809.08728v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.08728v1-abstract-full" style="display: none;"> Control of materials through custom design of ionic distributions represents a powerful new approach to develop future technologies ranging from spintronic logic and memory devices to energy storage. Perovskites have shown particular promise for ionic devices due to their high ion mobility and sensitivity to chemical stoichiometry. In this work, we demonstrate a solid-state approach to control of ionic distributions in (La,Sr)CoO$_{3}$ thin films. Depositing a Gd capping layer on the perovskite film, oxygen is controllably extracted from the structure, up-to 0.5 O/u.c. throughout the entire 36 nm thickness. Commensurate with the oxygen extraction, the Co valence state and saturation magnetization show a smooth continuous variation. In contrast, magnetoresistance measurements show no-change in the magnetic anisotropy and a rapid increase in the resistivity over the same range of oxygen stoichiometry. These results suggest significant phase separation, with metallic ferromagnetic regions and oxygen-deficient, insulating, non-ferromagnetic regions, forming percolated networks. Indeed, X-ray diffraction identifies oxygen-vacancy ordering, including transformation to a brownmillerite crystal structure. The unexpected transformation to the brownmillerite phase at ambient temperature is further confirmed by high-resolution scanning transmission electron microscopy which shows significant structural - and correspondingly chemical - phase separation. This work demonstrates room-temperature ionic control of magnetism, electrical resistivity, and crystalline structure in a 36 nm thick film, presenting new opportunities for ionic devices that leverage multiple material functionalities. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.08728v1-abstract-full').style.display = 'none'; document.getElementById('1809.08728v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 2, 104402 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1809.07810">arXiv:1809.07810</a> <span> [<a href="https://arxiv.org/pdf/1809.07810">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.1.024410">10.1103/PhysRevMaterials.1.024410 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Control of hidden ground-state order in NdNiO$_3$ superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Disa%2C+A+S">Ankit S. Disa</a>, <a href="/search/cond-mat?searchtype=author&query=Georgescu%2C+A+B">Alexandru B. Georgescu</a>, <a href="/search/cond-mat?searchtype=author&query=Hart%2C+J+L">James L. Hart</a>, <a href="/search/cond-mat?searchtype=author&query=Kumah%2C+D+P">Divine P. Kumah</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Arena%2C+D+A">Dario A. Arena</a>, <a href="/search/cond-mat?searchtype=author&query=Ismail-Beigi%2C+S">Sohrab Ismail-Beigi</a>, <a href="/search/cond-mat?searchtype=author&query=Taheri%2C+M+L">Mitra L. Taheri</a>, <a href="/search/cond-mat?searchtype=author&query=Walker%2C+F+J">Frederick J. Walker</a>, <a href="/search/cond-mat?searchtype=author&query=Ahn%2C+C+H">Charles H. Ahn</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1809.07810v1-abstract-short" style="display: inline;"> The combination of charge and spin degrees of freedom with electronic correlations in condensed matter systems leads to a rich array of phenomena, such as magnetism, superconductivity, and novel conduction mechanisms. While such phenomena are observed in bulk materials, a richer array of behaviors becomes possible when these degrees of freedom are controlled in atomically layered heterostructures,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.07810v1-abstract-full').style.display = 'inline'; document.getElementById('1809.07810v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1809.07810v1-abstract-full" style="display: none;"> The combination of charge and spin degrees of freedom with electronic correlations in condensed matter systems leads to a rich array of phenomena, such as magnetism, superconductivity, and novel conduction mechanisms. While such phenomena are observed in bulk materials, a richer array of behaviors becomes possible when these degrees of freedom are controlled in atomically layered heterostructures, where one can constrain dimensionality and impose interfacial boundary conditions. Here, we unlock a host of unique, hidden electronic and magnetic phase transitions in NdNiO$_3$ while approaching the two-dimensional (2D) limit, resulting from the differing influences of dimensional confinement and interfacial coupling. Most notably, we discover a new phase in fully 2D, single layer NdNiO$_3$, in which all signatures of the bulk magnetic and charge ordering are found to vanish. In addition, for quasi two-dimensional layers down to a thickness of two unit cells, bulk-type ordering persists but separates from the onset of insulating behavior in a manner distinct from that found in the bulk or thin film nickelates. Using resonant x-ray spectroscopies, first-principles theory, and model calculations, we propose that the single layer phase suppression results from a new mechanism of interfacial electronic reconstruction based on ionicity differences across the interface, while the phase separation in multi-layer NdNiO$_3$ emerges due to enhanced 2D fluctuations. These findings provide insights into the intertwined mechanisms of charge and spin ordering in strongly correlated systems in reduced dimensions and illustrate the ability to use atomic layering to access hidden phases. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1809.07810v1-abstract-full').style.display = 'none'; document.getElementById('1809.07810v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">30 pages, 13 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 1, 024410 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1807.08815">arXiv:1807.08815</a> <span> [<a href="https://arxiv.org/pdf/1807.08815">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Effect of Fluoropolymer Composition on Topochemical Synthesis of SrMnO$_{3-未}$F$_{纬}$ Oxyfluoride Films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wang%2C+J">Jiayi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Shin%2C+Y">Yongjin Shin</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Lefler%2C+B+M">Benjamin M. Lefler</a>, <a href="/search/cond-mat?searchtype=author&query=Rondinelli%2C+J+M">James M. Rondinelli</a>, <a href="/search/cond-mat?searchtype=author&query=May%2C+S+J">Steven J. May</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1807.08815v1-abstract-short" style="display: inline;"> We report the synthesis of SrMnO$_{3-未}$F$_{纬}$ perovskite oxyfluoride thin films using a vapor transport method to fluorinate as-grown SrMnO$_{2.5}$ epitaxial thin films. The influence of the fluoropolymer, which acts as a fluorine vapor source, was investigated by utilizing polyvinyl fluoride (PVF), polyvinylidene difluoride (PVDF) and polytetrafluoroethylene (PTFE) in the reaction. The same pro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.08815v1-abstract-full').style.display = 'inline'; document.getElementById('1807.08815v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1807.08815v1-abstract-full" style="display: none;"> We report the synthesis of SrMnO$_{3-未}$F$_{纬}$ perovskite oxyfluoride thin films using a vapor transport method to fluorinate as-grown SrMnO$_{2.5}$ epitaxial thin films. The influence of the fluoropolymer, which acts as a fluorine vapor source, was investigated by utilizing polyvinyl fluoride (PVF), polyvinylidene difluoride (PVDF) and polytetrafluoroethylene (PTFE) in the reaction. The same process was carried out with polyethylene (PE) to isolate the role of carbon in the vapor transport process. The F distribution was probed by X-ray photoemission spectroscopy, which confirmed the incorporation of F into the films and revealed higher F concentrations in films exposed to PVF and PVDF compared to PTFE. The c-axis parameter expands after fluorination, a result consistent with density functional theory calculations that attribute the volume expansion to elongated Mn-F bonds compared to shorter Mn-O bonds. Using X-ray absorption spectroscopy, we show that the fluorination process reduces the nominal Mn oxidation state suggesting that F substitutes on O sites in the lattice as opposed to filling anion vacancy sites, a finding further supported by calculated formation energies of different F site occupancies. These results provide new insights into topochemical fluorination of perovskite oxides, which should enable future synthesis and design efforts focused on oxyfluoride heterostructures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1807.08815v1-abstract-full').style.display = 'none'; document.getElementById('1807.08815v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 July, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">to appear in Physical Review Materials</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.07224">arXiv:1806.07224</a> <span> [<a href="https://arxiv.org/pdf/1806.07224">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-018-04546-5">10.1038/s41467-018-04546-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nature of the metal-insulator transition in few-unit-cell-thick LaNiO3 films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Golalikhani%2C+M">M. Golalikhani</a>, <a href="/search/cond-mat?searchtype=author&query=Lei%2C+Q">Q. Lei</a>, <a href="/search/cond-mat?searchtype=author&query=Chandrasena%2C+R+U">R. U. Chandrasena</a>, <a href="/search/cond-mat?searchtype=author&query=Kasaei%2C+L">L. Kasaei</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+H">H. Park</a>, <a href="/search/cond-mat?searchtype=author&query=Bai%2C+J">J. Bai</a>, <a href="/search/cond-mat?searchtype=author&query=Orgiani%2C+P">P. Orgiani</a>, <a href="/search/cond-mat?searchtype=author&query=Ciston%2C+J">J. Ciston</a>, <a href="/search/cond-mat?searchtype=author&query=Sterbinsky%2C+G+E">G. E. Sterbinsky</a>, <a href="/search/cond-mat?searchtype=author&query=Arena%2C+D+A">D. A. Arena</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Davidson%2C+B+A">B. A. Davidson</a>, <a href="/search/cond-mat?searchtype=author&query=Millis%2C+A+J">A. J. Millis</a>, <a href="/search/cond-mat?searchtype=author&query=Gray%2C+A+X">A. X. Gray</a>, <a href="/search/cond-mat?searchtype=author&query=Xi%2C+X+X">X. X. Xi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1806.07224v1-abstract-short" style="display: inline;"> The nature of the metal insulator transition in thin films and superlattices of LaNiO3 with only few unit cells in thickness remains elusive despite tremendous effort. Quantum confinement and epitaxial strain have been evoked as the mechanisms, although other factors such as growth-induced disorder, cation non-stoichiometry, oxygen vacancies, and substrate-film interface quality may also affect th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.07224v1-abstract-full').style.display = 'inline'; document.getElementById('1806.07224v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.07224v1-abstract-full" style="display: none;"> The nature of the metal insulator transition in thin films and superlattices of LaNiO3 with only few unit cells in thickness remains elusive despite tremendous effort. Quantum confinement and epitaxial strain have been evoked as the mechanisms, although other factors such as growth-induced disorder, cation non-stoichiometry, oxygen vacancies, and substrate-film interface quality may also affect the observable properties in the ultrathin films. Here we report results obtained for near-ideal LaNiO3 films with different thicknesses and terminations grown by atomic layer-by-layer laser molecular beam epitaxy on LaAlO3 substrates. We find that the room-temperature metallic behavior persists until the film thickness is reduced to an unprecedentedly small 1.5 unit cells (NiO2 termination). Electronic structure measurements using x-ray absorption spectroscopy and first-principles calculation suggest that oxygen vacancies existing in the films also contribute to the metal insulator transition. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.07224v1-abstract-full').style.display = 'none'; document.getElementById('1806.07224v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nat Commun. 2018; 9: 2206 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.05733">arXiv:1806.05733</a> <span> [<a href="https://arxiv.org/pdf/1806.05733">pdf</a>, <a href="https://arxiv.org/format/1806.05733">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.2.093801">10.1103/PhysRevMaterials.2.093801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Resolving interfacial charge transfer in titanate superlattices using resonant X-ray reflectometry </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Need%2C+R+F">R. F. Need</a>, <a href="/search/cond-mat?searchtype=author&query=Marshall%2C+P+B">P. B. Marshall</a>, <a href="/search/cond-mat?searchtype=author&query=Weschke%2C+E">E. Weschke</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A+J">A. J. Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Gilbert%2C+D+A">D. A. Gilbert</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Stemmer%2C+S">S. Stemmer</a>, <a href="/search/cond-mat?searchtype=author&query=Wilson%2C+S+D">S. D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1806.05733v1-abstract-short" style="display: inline;"> Charge transfer in oxide heterostructures can be tuned to promote emergent interfacial states, and accordingly, has been the subject of intense study in recent years. However, accessing the physics at these interfaces, which are often buried deep below the sample surface, remains difficult. Addressing this challenge requires techniques capable of measuring the local electronic structure with high-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.05733v1-abstract-full').style.display = 'inline'; document.getElementById('1806.05733v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.05733v1-abstract-full" style="display: none;"> Charge transfer in oxide heterostructures can be tuned to promote emergent interfacial states, and accordingly, has been the subject of intense study in recent years. However, accessing the physics at these interfaces, which are often buried deep below the sample surface, remains difficult. Addressing this challenge requires techniques capable of measuring the local electronic structure with high-resolution depth dependence. Here, we have used linearly-polarized resonant X-ray reflectometry (RXR) as a means to visualize charge transfer in oxide superlattices with atomic layer precision. From our RXR measurements, we extract valence depth profiles of SmTiO$_3$ (SmTO)/SrTiO$_3$ (STO) heterostructures with STO quantum wells varying in thickness from 5 SrO planes down to a single, atomically thin SrO plane. At the polar-nonpolar SmTO/STO interface, an electrostatic discontinuity leads to approximately half an electron per areal unit cell transferred from the interfacial SmO layer into the neighboring STO quantum well. We observe this charge transfer as a suppression of the t$_{2g}$ absorption peaks that minimizes contrast with the neighboring SmTO layers at those energies and leads to a pronounced absence of superlattice peaks in the reflectivity data. Our results demonstrate the sensitivity of RXR to electronic reconstruction at the atomic scale, and establish RXR as a powerful means of characterizing charge transfer at buried oxide interfaces. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.05733v1-abstract-full').style.display = 'none'; document.getElementById('1806.05733v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> Phys. Rev. Materials, 2, 093801 (2018) </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 2, 093801 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.08589">arXiv:1804.08589</a> <span> [<a href="https://arxiv.org/pdf/1804.08589">pdf</a>, <a href="https://arxiv.org/format/1804.08589">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Anomalous orbital structure in two-dimensional titanium dichalcogenides </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Pal%2C+B">Banabir Pal</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Wen%2C+F">Fangdi Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Diaye%2C+A+T+N">A. T. N Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">J. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1804.08589v1-abstract-short" style="display: inline;"> Generally, lattice distortions play a key role in determining the ground states of materials. Although it is well known that trigonal distortions are generic to most two-dimensional transition metal dichalcogenides, the impact of this structural distortion on the electronic structure has not been understood conclusively. Here, by using a combination of polarization dependent X-ray absorption spect… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.08589v1-abstract-full').style.display = 'inline'; document.getElementById('1804.08589v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.08589v1-abstract-full" style="display: none;"> Generally, lattice distortions play a key role in determining the ground states of materials. Although it is well known that trigonal distortions are generic to most two-dimensional transition metal dichalcogenides, the impact of this structural distortion on the electronic structure has not been understood conclusively. Here, by using a combination of polarization dependent X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS) and atomic multiplet cluster calculations, we have investigated the electronic structure of titanium dichalcogenides TiX2 (X=S, Se, Te), where the magnitude of the trigonal distortion increase monotonically from S to Se and Te. Our results reveal the presence of an anomalous and large crystal filed splitting. This unusual kind of crystal field splitting is likely responsible for the unconventional electronic structure of TiX2 compounds. Our results also indicate the drawback of the distorted crystal field picture in explaining the observed electronic ground state of these materials and emphasize the key importance of metal-ligand hybridization and electronic correlation in defining the electronic structures near Fermi energy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.08589v1-abstract-full').style.display = 'none'; document.getElementById('1804.08589v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.08579">arXiv:1804.08579</a> <span> [<a href="https://arxiv.org/pdf/1804.08579">pdf</a>, <a href="https://arxiv.org/format/1804.08579">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/1.5029977">10.1063/1.5029977 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electronic properties of ultra-thin YCrO3 films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Pal%2C+B">Banabir Pal</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Wen%2C+F">Fangdi Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">Mikhail Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Diaye%2C+A+T+N">A. T. N Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">Jak Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1804.08579v1-abstract-short" style="display: inline;"> We report on the heteroepitaxial stabilization of YCrO3 ultra-thin films on LSAT (001) substrate. Using a combination of resonant X-ray absorption spectroscopy (XAS) and atomic multiplet cluster calculation, the electronic structure of YCrO3 thin film was investigated. Polarization dependent Cr L3,2 edge XAS measurement reveal the presence of an anomalous orbital polarization uncharacteristic of a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.08579v1-abstract-full').style.display = 'inline'; document.getElementById('1804.08579v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.08579v1-abstract-full" style="display: none;"> We report on the heteroepitaxial stabilization of YCrO3 ultra-thin films on LSAT (001) substrate. Using a combination of resonant X-ray absorption spectroscopy (XAS) and atomic multiplet cluster calculation, the electronic structure of YCrO3 thin film was investigated. Polarization dependent Cr L3,2 edge XAS measurement reveal the presence of an anomalous orbital polarization uncharacteristic of a 3d3 electronic system. Atomic multiplet calculations demonstrate the critical importance of charge transfer energy, Coulomb correlation strength and hopping interaction in stabilizing this unusual orbital polarized state likely connected to the bulk multiferroicity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.08579v1-abstract-full').style.display = 'none'; document.getElementById('1804.08579v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.05487">arXiv:1804.05487</a> <span> [<a href="https://arxiv.org/pdf/1804.05487">pdf</a>, <a href="https://arxiv.org/format/1804.05487">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-018-03964-9">10.1038/s41467-018-03964-9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Artificial two-dimensional polar metal at room temperature </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Z">Zhen Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+S+Y">Se Young Park</a>, <a href="/search/cond-mat?searchtype=author&query=Yuan%2C+Y">Yakun Yuan</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Nikitin%2C+S+M">Sergey M. Nikitin</a>, <a href="/search/cond-mat?searchtype=author&query=Akamatsu%2C+H">Hirofumi Akamatsu</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Middey%2C+S">S. Middey</a>, <a href="/search/cond-mat?searchtype=author&query=Meyers%2C+D">D. Meyers</a>, <a href="/search/cond-mat?searchtype=author&query=Thompson%2C+P">P. Thompson</a>, <a href="/search/cond-mat?searchtype=author&query=Ryan%2C+P+J">P. J. Ryan</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A">A. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Gopalan%2C+V">Venkatraman Gopalan</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+Y">Yimei Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Rabe%2C+K+M">Karin M. Rabe</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalain%2C+J">J. Chakhalain</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1804.05487v1-abstract-short" style="display: inline;"> Polar metals, commonly defined by the coexistence of polar crystal structure and metallicity, are thought to be scarce because the long-range electrostatic fields favoring the polar structure are expected to be fully screened by the conduction electrons of a metal. Moreover, reducing from three to two dimensions, it remains an open question whether a polar metal can exist. Here we report on the re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.05487v1-abstract-full').style.display = 'inline'; document.getElementById('1804.05487v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.05487v1-abstract-full" style="display: none;"> Polar metals, commonly defined by the coexistence of polar crystal structure and metallicity, are thought to be scarce because the long-range electrostatic fields favoring the polar structure are expected to be fully screened by the conduction electrons of a metal. Moreover, reducing from three to two dimensions, it remains an open question whether a polar metal can exist. Here we report on the realization of a room temperature two-dimensional polar metal of the B-site type in tri-color (tri-layer) superlattices BaTiO$_3$/SrTiO$_3$/LaTiO$_3$. A combination of atomic resolution scanning transmission electron microscopy with electron energy loss spectroscopy, optical second harmonic generation, electrical transport, and first-principles calculations have revealed the microscopic mechanisms of periodic electric polarization, charge distribution, and orbital symmetry. Our results provide a route to creating all-oxide artificial non-centrosymmetric quasi-two-dimensional metals with exotic quantum states including coexisting ferroelectric, ferromagnetic, and superconducting phases. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.05487v1-abstract-full').style.display = 'none'; document.getElementById('1804.05487v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications 9, 1547 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1801.05374">arXiv:1801.05374</a> <span> [<a href="https://arxiv.org/pdf/1801.05374">pdf</a>, <a href="https://arxiv.org/format/1801.05374">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.2.015002">10.1103/PhysRevMaterials.2.015002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electronic structure of negative charge transfer CaFeO3 across the metal-insulator transition </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Rogge%2C+P+C">Paul C. Rogge</a>, <a href="/search/cond-mat?searchtype=author&query=Chandrasena%2C+R+U">Ravini U. Chandrasena</a>, <a href="/search/cond-mat?searchtype=author&query=Cammarata%2C+A">Antonio Cammarata</a>, <a href="/search/cond-mat?searchtype=author&query=Green%2C+R+J">Robert J. Green</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Lefler%2C+B+M">Benjamin M. Lefler</a>, <a href="/search/cond-mat?searchtype=author&query=Huon%2C+A">Amanda Huon</a>, <a href="/search/cond-mat?searchtype=author&query=Arab%2C+A">Arian Arab</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+H+N">Ho Nyung Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+T">Tien-Lin Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Nem%C5%A1%C3%A1k%2C+S">Slavom铆r Nem拧谩k</a>, <a href="/search/cond-mat?searchtype=author&query=Rondinelli%2C+J+M">James M. Rondinelli</a>, <a href="/search/cond-mat?searchtype=author&query=Gray%2C+A+X">Alexander X. Gray</a>, <a href="/search/cond-mat?searchtype=author&query=May%2C+S+J">Steven J. May</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1801.05374v2-abstract-short" style="display: inline;"> We investigated the metal-insulator transition for epitaxial thin films of the perovskite CaFeO3, a material with a significant oxygen ligand hole contribution to its electronic structure. We find that biaxial tensile and compressive strain suppress the metal-insulator transition temperature. By combining hard X-ray photoelectron spectroscopy, soft X-ray absorption spectroscopy, and density functi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.05374v2-abstract-full').style.display = 'inline'; document.getElementById('1801.05374v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1801.05374v2-abstract-full" style="display: none;"> We investigated the metal-insulator transition for epitaxial thin films of the perovskite CaFeO3, a material with a significant oxygen ligand hole contribution to its electronic structure. We find that biaxial tensile and compressive strain suppress the metal-insulator transition temperature. By combining hard X-ray photoelectron spectroscopy, soft X-ray absorption spectroscopy, and density functional calculations, we resolve the element-specific changes to the electronic structure across the metal-insulator transition. We demonstrate that the Fe electron valence undergoes no observable change between the metallic and insulating states, whereas the O electronic configuration undergoes significant changes. This strongly supports the bond-disproportionation model of the metal-insulator transition for CaFeO3 and highlights the importance of ligand holes in its electronic structure. By sensitively measuring the ligand hole density, however, we find that it increases by ~5-10% in the insulating state, which we ascribe to a further localization of electron charge on the Fe sites. These results provide detailed insight into the metal-insulator transition of negative charge transfer compounds and should prove instructive for understanding metal-insulator transitions in other late transition metal compounds such as the nickelates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1801.05374v2-abstract-full').style.display = 'none'; document.getElementById('1801.05374v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Minor typographic changes made</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Mater. 2, 015002 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1712.08504">arXiv:1712.08504</a> <span> [<a href="https://arxiv.org/pdf/1712.08504">pdf</a>, <a href="https://arxiv.org/format/1712.08504">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.1.075004">10.1103/PhysRevMaterials.1.075004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Synthesis and electronic properties of Ruddlesden-Popper strontium iridate epitaxial thin films stabilized by control of growth kinetics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Pal%2C+B">B. Pal</a>, <a href="/search/cond-mat?searchtype=author&query=Middey%2C+S">S. Middey</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+Y">Y. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Haskel%2C+D">D. Haskel</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">J. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1712.08504v1-abstract-short" style="display: inline;"> We report on the selective fabrication of high-quality Sr$_2$IrO$_4$ and SrIrO$_3$ epitaxial thin films from a single polycrystalline Sr$_2$IrO$_4$ target by pulsed laser deposition. Using a combination of X-ray diffraction and photoemission spectroscopy characterizations, we discover that within a relatively narrow range of substrate temperature, the oxygen partial pressure plays a critical role… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.08504v1-abstract-full').style.display = 'inline'; document.getElementById('1712.08504v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1712.08504v1-abstract-full" style="display: none;"> We report on the selective fabrication of high-quality Sr$_2$IrO$_4$ and SrIrO$_3$ epitaxial thin films from a single polycrystalline Sr$_2$IrO$_4$ target by pulsed laser deposition. Using a combination of X-ray diffraction and photoemission spectroscopy characterizations, we discover that within a relatively narrow range of substrate temperature, the oxygen partial pressure plays a critical role in the cation stoichiometric ratio of the films, and triggers the stabilization of different Ruddlesden-Popper (RP) phases. Resonant X-ray absorption spectroscopy measurements taken at the Ir $L$-edge and the O $K$-edge demonstrate the presence of strong spin-orbit coupling, and reveal the electronic and orbital structures of both compounds. These results suggest that in addition to the conventional thermodynamics consideration, higher members of the Sr$_{n+1}$Ir$_n$O$_{3n+1}$ series can possibly be achieved by kinetic control away from the thermodynamic limit. These findings offer a new approach to the synthesis of ultra-thin films of the RP series of iridates and can be extended to other complex oxides with layered structure. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1712.08504v1-abstract-full').style.display = 'none'; document.getElementById('1712.08504v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 December, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review MATERIALS 1, 075004 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.07592">arXiv:1710.07592</a> <span> [<a href="https://arxiv.org/pdf/1710.07592">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41535-019-0164-1">10.1038/s41535-019-0164-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Confinement of magnetism in atomically-thin $La_{0.7}Sr_{0.3}CrO_3$/$La_{0.7}Sr_{0.3}MnO_3$ heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Koohfar%2C+S">Sanaz Koohfar</a>, <a href="/search/cond-mat?searchtype=author&query=Georgescu%2C+A+B">Alexandru Bogdan Georgescu</a>, <a href="/search/cond-mat?searchtype=author&query=Penn%2C+A">Aubrey Penn</a>, <a href="/search/cond-mat?searchtype=author&query=LeBeau%2C+J+M">James M. LeBeau</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Kumah%2C+D+P">Divine Philip Kumah</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.07592v2-abstract-short" style="display: inline;"> At crystalline interfaces where a valence mismatch exists, electronic and structural interactions may occur to relieve the polar mismatch leading to the stabilization of non-bulklike phases. We show that spontaneous reconstructions at polar $La_{0.7}Sr_{0.3}MnO_3$ interfaces are correlated with suppressed ferromagnetism for film thicknesses on the order of a unit cell. We investigate the structura… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.07592v2-abstract-full').style.display = 'inline'; document.getElementById('1710.07592v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.07592v2-abstract-full" style="display: none;"> At crystalline interfaces where a valence mismatch exists, electronic and structural interactions may occur to relieve the polar mismatch leading to the stabilization of non-bulklike phases. We show that spontaneous reconstructions at polar $La_{0.7}Sr_{0.3}MnO_3$ interfaces are correlated with suppressed ferromagnetism for film thicknesses on the order of a unit cell. We investigate the structural and magnetic properties of valence-matched $La_{0.7}Sr_{0.3}CrO_3$ - $La_{0.7}Sr_{0.3}MnO_3$ interfaces using a combination of high-resolution electron microscopy, first principles theory, synchrotron X-ray scattering and magnetic spectroscopy and temperature-dependent magnetometry. A combination of an antiferromagnetic coupling between the $La_{0.7}Sr_{0.3}CrO_3$ and $La_{0.7}Sr_{0.3}MnO_3$ layers and a suppression of interfacial polar distortions are found to result in robust long range ferromagnetic ordering for ultra-thin $La_{0.7}Sr_{0.3}MnO_3$. These results underscore the critical importance of interfacial structural and magnetic interactions in the design of devices based on two-dimensional oxide magnetic systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.07592v2-abstract-full').style.display = 'none'; document.getElementById('1710.07592v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> npj Quantum Materials,4, 25 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.04605">arXiv:1709.04605</a> <span> [<a href="https://arxiv.org/pdf/1709.04605">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.1.044203">10.1103/PhysRevMaterials.1.044203 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Towards diluted magnetism in TaAs </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Y">Yu Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhilin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+L">Liwei Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+X">Xiaolong Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Yuan%2C+Y">Ye Yuan</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+C">Chi Xu</a>, <a href="/search/cond-mat?searchtype=author&query=H%C3%BCbner%2C+R">Ren茅 H眉bner</a>, <a href="/search/cond-mat?searchtype=author&query=Akhmadaliev%2C+S">Shavkat Akhmadaliev</a>, <a href="/search/cond-mat?searchtype=author&query=Krasheninnikov%2C+A+V">Arkady V. Krasheninnikov</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Helm%2C+M">Manfred Helm</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+S">Shengqiang Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1709.04605v2-abstract-short" style="display: inline;"> Magnetism in Weyl semimetals is desired to investigate the interaction between the magnetic moments and Weyl fermions, e.g. to explore anomalous quantum Hall phenomena. Here we demonstrate that proton irradiation is an effective tool to induce ferromagnetism in the Weyl semimetal TaAs. The intrinsic magnetism is observed with a transition temperature above room temperature. The magnetic moments fr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.04605v2-abstract-full').style.display = 'inline'; document.getElementById('1709.04605v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.04605v2-abstract-full" style="display: none;"> Magnetism in Weyl semimetals is desired to investigate the interaction between the magnetic moments and Weyl fermions, e.g. to explore anomalous quantum Hall phenomena. Here we demonstrate that proton irradiation is an effective tool to induce ferromagnetism in the Weyl semimetal TaAs. The intrinsic magnetism is observed with a transition temperature above room temperature. The magnetic moments from d states are found to be localized around Ta atoms. Further, the first-principles calculations indicate that the d states localized on the nearest-neighbor Ta atoms of As vacancy sites are responsible for the observed magnetic moments and the long-ranged magnetic order. The results show the feasibility of inducing ferromagnetism in Weyl semimetals so that they may facilitate the applications of this material in spintronics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.04605v2-abstract-full').style.display = 'none'; document.getElementById('1709.04605v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 1, 044203 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.02035">arXiv:1709.02035</a> <span> [<a href="https://arxiv.org/pdf/1709.02035">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.119.156801">10.1103/PhysRevLett.119.156801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electron Accumulation and Emergent Magnetism in LaMnO3/SrTiO3 Heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Z">Zuhuang Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Z">Zhanghui Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Z+Q">Z. Q. Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Holtz%2C+M+E">M. E. Holtz</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+C+J">C. J. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+X+R">X. Renshaw Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Lv%2C+W+M">W. M. Lv</a>, <a href="/search/cond-mat?searchtype=author&query=Motapothula%2C+M">M. Motapothula</a>, <a href="/search/cond-mat?searchtype=author&query=Fan%2C+L+S">L. S. Fan</a>, <a href="/search/cond-mat?searchtype=author&query=Turcaud%2C+J+A">J. A. Turcaud</a>, <a href="/search/cond-mat?searchtype=author&query=Dedon%2C+L+R">L. R. Dedon</a>, <a href="/search/cond-mat?searchtype=author&query=Frederick%2C+C">C. Frederick</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+R+J">R. J. Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+R">R. Gao</a>, <a href="/search/cond-mat?searchtype=author&query=NDiaye%2C+A+T">A. T. NDiaye</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Mundy%2C+J+A">J. A. Mundy</a>, <a href="/search/cond-mat?searchtype=author&query=Venkatesan%2C+T">T. Venkatesan</a>, <a href="/search/cond-mat?searchtype=author&query=Muller%2C+D+A">D. A. Muller</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+L+-">L. -W. Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+J">J. Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Martin%2C+L+W">L. W. Martin</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1709.02035v1-abstract-short" style="display: inline;"> Emergent phenomena at polar-nonpolar oxide interfaces have been studied intensely in pursuit of next-generation oxide electronics and spintronics. Here we report the disentanglement of critical thicknesses for electron reconstruction and the emergence of ferromagnetism in polar-mismatched LaMnO3/SrTiO3 (001) heterostructures. Using a combination of element-specific X-ray absorption spectroscopy an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.02035v1-abstract-full').style.display = 'inline'; document.getElementById('1709.02035v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.02035v1-abstract-full" style="display: none;"> Emergent phenomena at polar-nonpolar oxide interfaces have been studied intensely in pursuit of next-generation oxide electronics and spintronics. Here we report the disentanglement of critical thicknesses for electron reconstruction and the emergence of ferromagnetism in polar-mismatched LaMnO3/SrTiO3 (001) heterostructures. Using a combination of element-specific X-ray absorption spectroscopy and dichroism, and first-principles calculations, interfacial electron accumulation and ferromagnetism have been observed within the polar, antiferromagnetic insulator LaMnO3. Our results show that the critical thickness for the onset of electron accumulation is as thin as 2 unit cells (UC), significantly thinner than the observed critical thickness for ferromagnetism of 5 UC. The absence of ferromagnetism below 5 UC is likely induced by electron over-accumulation. In turn, by controlling the doping of the LaMnO3, we are able to neutralize the excessive electrons from the polar mismatch in ultrathin LaMnO3 films and thus enable ferromagnetism in films as thin as 3 UC, extending the limits of our ability to synthesize and tailor emergent phenomena at interfaces and demonstrating manipulation of the electronic and magnetic structures of materials at the shortest length scales. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.02035v1-abstract-full').style.display = 'none'; document.getElementById('1709.02035v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted by Phys. Rev. Lett</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1707.03460">arXiv:1707.03460</a> <span> [<a href="https://arxiv.org/pdf/1707.03460">pdf</a>, <a href="https://arxiv.org/ps/1707.03460">ps</a>, <a href="https://arxiv.org/format/1707.03460">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.119.077201">10.1103/PhysRevLett.119.077201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tuning Perpendicular Magnetic Anisotropy by Oxygen Octahedral Rotations in (La$_{1-x}$Sr$_{x}$MnO$_{3}$)/(SrIrO$_{3}$) Superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yi%2C+D">Di Yi</a>, <a href="/search/cond-mat?searchtype=author&query=Flint%2C+C+L">Charles L. Flint</a>, <a href="/search/cond-mat?searchtype=author&query=Balakrishnan%2C+P+P">Purnima P. Balakrishnan</a>, <a href="/search/cond-mat?searchtype=author&query=Mahalingam%2C+K">Krishnamurthy Mahalingam</a>, <a href="/search/cond-mat?searchtype=author&query=Urwin%2C+B">Brittany Urwin</a>, <a href="/search/cond-mat?searchtype=author&query=Vailionis%2C+A">Arturas Vailionis</a>, <a href="/search/cond-mat?searchtype=author&query=NDiaye%2C+A+T">Alpha T. NDiaye</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+Y">Yongseong Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Stone%2C+K+H">Kevin H. Stone</a>, <a href="/search/cond-mat?searchtype=author&query=Chu%2C+J">JiunHaw Chu</a>, <a href="/search/cond-mat?searchtype=author&query=Howe%2C+B+M">Brandon M. Howe</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+J">Jian Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Fisher%2C+I+R">Ian R. Fisher</a>, <a href="/search/cond-mat?searchtype=author&query=Suzuki%2C+Y">Yuri Suzuki</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1707.03460v2-abstract-short" style="display: inline;"> Perpendicular magnetic anisotropy (PMA) plays a critical role in the development of spintronics, thereby demanding new strategies to control PMA. Here we demonstrate a conceptually new type of interface induced PMA that is controlled by oxygen octahedral rotation. In superlattices comprised of La$_{1-x}$Sr$_{x}$MnO$_{3}$ and SrIrO$_{3}$, we find that all superlattices (0$\leq$x$\leq$1) exhibit fer… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.03460v2-abstract-full').style.display = 'inline'; document.getElementById('1707.03460v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1707.03460v2-abstract-full" style="display: none;"> Perpendicular magnetic anisotropy (PMA) plays a critical role in the development of spintronics, thereby demanding new strategies to control PMA. Here we demonstrate a conceptually new type of interface induced PMA that is controlled by oxygen octahedral rotation. In superlattices comprised of La$_{1-x}$Sr$_{x}$MnO$_{3}$ and SrIrO$_{3}$, we find that all superlattices (0$\leq$x$\leq$1) exhibit ferromagnetism despite the fact that La$_{1-x}$Sr$_{x}$MnO$_{3}$ is antiferromagnetic for x$>$0.5. PMA as high as 4$\times$10$^6$ erg/cm$^3$ is observed by increasing x and attributed to a decrease of oxygen octahedral rotation at interfaces. We also demonstrate that oxygen octahedral deformation cannot explain the trend in PMA. These results reveal a new degree of freedom to control PMA, enabling discovery of emergent magnetic textures and topological phenomena. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1707.03460v2-abstract-full').style.display = 'none'; document.getElementById('1707.03460v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1705.07793">arXiv:1705.07793</a> <span> [<a href="https://arxiv.org/pdf/1705.07793">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.95.195309">10.1103/PhysRevB.95.195309 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Interaction between magnetic moments and itinerant carriers in d0 ferromagnetic SiC </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Y">Yu Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Yuan%2C+Y">Ye Yuan</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+F">Fang Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Boettger%2C+R">Roman Boettger</a>, <a href="/search/cond-mat?searchtype=author&query=Anwand%2C+W">Wolfgang Anwand</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yutian Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Semisalova%2C+A">Anna Semisalova</a>, <a href="/search/cond-mat?searchtype=author&query=Ponomaryov%2C+A+N">Alexey N. Ponomaryov</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+X">Xia Lu</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Heera%2C+V">Viton Heera</a>, <a href="/search/cond-mat?searchtype=author&query=Skorupa%2C+W">Wolfgang Skorupa</a>, <a href="/search/cond-mat?searchtype=author&query=Helm%2C+M">Manfred Helm</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+S">Shengqiang Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1705.07793v1-abstract-short" style="display: inline;"> Elucidating the interaction between magnetic moments and itinerant carriers is an important step to spintronic applications. Here, we investigate magnetic and transport properties in d0 ferromagnetic SiC single crystals prepared by postimplantation pulsed laser annealing. Magnetic moments are contributed by the p states of carbon atoms, but their magnetic circular dichroism is different from that… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.07793v1-abstract-full').style.display = 'inline'; document.getElementById('1705.07793v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1705.07793v1-abstract-full" style="display: none;"> Elucidating the interaction between magnetic moments and itinerant carriers is an important step to spintronic applications. Here, we investigate magnetic and transport properties in d0 ferromagnetic SiC single crystals prepared by postimplantation pulsed laser annealing. Magnetic moments are contributed by the p states of carbon atoms, but their magnetic circular dichroism is different from that in semi-insulating SiC samples. The anomalous Hall effect and negative magnetoresistance indicate the influence of d0 spin order on free carriers. The ferromagnetism is relatively weak in N-implanted SiC compared with that in Al-implanted SiC after annealing. The results suggest that d0 magnetic moments and itinerant carriers can interact with each other, which will facilitate the development of SiC spintronic devices with d0 ferromagnetism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.07793v1-abstract-full').style.display = 'none'; document.getElementById('1705.07793v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 May, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 95, 195309 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.03163">arXiv:1704.03163</a> <span> [<a href="https://arxiv.org/pdf/1704.03163">pdf</a>, <a href="https://arxiv.org/ps/1704.03163">ps</a>, <a href="https://arxiv.org/format/1704.03163">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.1.024404">10.1103/PhysRevMaterials.1.024404 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Role of polar compensation in interfacial ferromagnetism of LaNiO$_3$/CaMnO$_3$ superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Flint%2C+C+L">Charles L. Flint</a>, <a href="/search/cond-mat?searchtype=author&query=Jang%2C+H">Hoyoung Jang</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+J">Jun-Sik Lee</a>, <a href="/search/cond-mat?searchtype=author&query=N%27Diaye%2C+A+T">Alpha T. N'Diaye</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Suzuki%2C+Y">Yuri Suzuki</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1704.03163v1-abstract-short" style="display: inline;"> Polar compensation can play an important role in the determination of interfacial electronic and magnetic properties in oxide heterostructures. Using x-ray absorption spectroscopy, x-ray magnetic circular dichroism, bulk magnetometry, and transport measurements, we find that interfacial charge redistribution via polar compensation is essential for explaining the evolution of interfacial ferromagne… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.03163v1-abstract-full').style.display = 'inline'; document.getElementById('1704.03163v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.03163v1-abstract-full" style="display: none;"> Polar compensation can play an important role in the determination of interfacial electronic and magnetic properties in oxide heterostructures. Using x-ray absorption spectroscopy, x-ray magnetic circular dichroism, bulk magnetometry, and transport measurements, we find that interfacial charge redistribution via polar compensation is essential for explaining the evolution of interfacial ferromagnetism in LaNiO$_3$/CaMnO$_3$ superlattices as a function of LaNiO$_3$ layer thickness. In insulating superlattices (4 unit cells or less of LaNiO$_3$), magnetism is dominated by Ni-Mn superexchange, while itinerant electron-based Mn-Mn double-exchange plays a role in thicker metallic superlattices. X-ray magnetic circular dichroism and resonant x-ray scattering show that Ni-Mn superexchange contributes to the magnetization even in metallic superlattices. This Ni-Mn superexchange interaction can be explained in terms of polar compensation at the LaNiO$_3$-CaMnO$_3$ interface. These results highlight the different mechanisms responsible for interfacial ferromagnetism and the importance of understanding compensation due to polar mismatch at oxide-based interfaces when engineering magnetic properties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.03163v1-abstract-full').style.display = 'none'; document.getElementById('1704.03163v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 1, 024404 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1701.01237">arXiv:1701.01237</a> <span> [<a href="https://arxiv.org/pdf/1701.01237">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.nanolett.7b00052">10.1021/acs.nanolett.7b00052 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetic switching in granular FePt layers promoted by near-field laser enhancement </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Granitzka%2C+P+W">Patrick W. Granitzka</a>, <a href="/search/cond-mat?searchtype=author&query=Jal%2C+E">Emmanuelle Jal</a>, <a href="/search/cond-mat?searchtype=author&query=Guyader%2C+L+L">Lo茂c Le Guyader</a>, <a href="/search/cond-mat?searchtype=author&query=Savoini%2C+M">Matteo Savoini</a>, <a href="/search/cond-mat?searchtype=author&query=Higley%2C+D+J">Daniel J. Higley</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+T">Tianmin Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Z">Zhao Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Chase%2C+T">Tyler Chase</a>, <a href="/search/cond-mat?searchtype=author&query=Ohldag%2C+H">Hendrik Ohldag</a>, <a href="/search/cond-mat?searchtype=author&query=Dakovsky%2C+G+L">Georgi L. Dakovsky</a>, <a href="/search/cond-mat?searchtype=author&query=Schlotter%2C+W">William Schlotter</a>, <a href="/search/cond-mat?searchtype=author&query=Carron%2C+S">Sebastian Carron</a>, <a href="/search/cond-mat?searchtype=author&query=Hoffman%2C+M">Matthias Hoffman</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Hellwig%2C+O">Olav Hellwig</a>, <a href="/search/cond-mat?searchtype=author&query=Mehta%2C+V">Virat Mehta</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+Y+K">Yukiko K. Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+J">J. Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Fullerton%2C+E+E">Eric E. Fullerton</a>, <a href="/search/cond-mat?searchtype=author&query=St%C3%B6hr%2C+J">Joachim St枚hr</a>, <a href="/search/cond-mat?searchtype=author&query=Reid%2C+A+H">Alexander H. Reid</a>, <a href="/search/cond-mat?searchtype=author&query=D%C3%BCrr%2C+H+A">Hermann A. D眉rr</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1701.01237v1-abstract-short" style="display: inline;"> Light-matter interaction at the nanoscale in magnetic materials is a topic of intense research in view of potential applications in next-generation high-density magnetic recording. Laser-assisted switching provides a pathway for overcoming the material constraints of high-anisotropy and high-packing density media, though much about the dynamics of the switching process remains unexplored. We use u… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.01237v1-abstract-full').style.display = 'inline'; document.getElementById('1701.01237v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1701.01237v1-abstract-full" style="display: none;"> Light-matter interaction at the nanoscale in magnetic materials is a topic of intense research in view of potential applications in next-generation high-density magnetic recording. Laser-assisted switching provides a pathway for overcoming the material constraints of high-anisotropy and high-packing density media, though much about the dynamics of the switching process remains unexplored. We use ultrafast small-angle x-ray scattering at an x-ray free-electron laser to probe the magnetic switching dynamics of FePt nanoparticles embedded in a carbon matrix following excitation by an optical femtosecond laser pulse. We observe that the combination of laser excitation and applied static magnetic field, one order of magnitude smaller than the coercive field, can overcome the magnetic anisotropy barrier between "up" and "down" magnetization, enabling magnetization switching. This magnetic switching is found to be inhomogeneous throughout the material, with some individual FePt nanoparticles neither switching nor demagnetizing. The origin of this behavior is identified as the near-field modification of the incident laser radiation around FePt nanoparticles. The fraction of not-switching nanoparticles is influenced by the heat flow between FePt and a heat-sink layer. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1701.01237v1-abstract-full').style.display = 'none'; document.getElementById('1701.01237v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 January, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nano Lett., Article ASAP, March 8, 2017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.06885">arXiv:1610.06885</a> <span> [<a href="https://arxiv.org/pdf/1610.06885">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> Constructing oxide interfaces and heterostructures by atomic layer-by-layer laser molecular beam epitaxy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Lei%2C+Q">Qingyu Lei</a>, <a href="/search/cond-mat?searchtype=author&query=Golalikhani%2C+M">Maryam Golalikhani</a>, <a href="/search/cond-mat?searchtype=author&query=Davidson%2C+B+A">Bruce A. Davidson</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+G">Guozhen Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Schlom%2C+D+G">D. G. Schlom</a>, <a href="/search/cond-mat?searchtype=author&query=Qiao%2C+Q">Qiao Qiao</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+Y">Yimei Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Chandrasena%2C+R+U">Ravini U. Chandrasena</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+W">Weibing Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Gray%2C+A+X">Alexander X. Gray</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Farrar%2C+A+K">Andrew K. Farrar</a>, <a href="/search/cond-mat?searchtype=author&query=Tenne%2C+D+A">Dmitri A. Tenne</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+M">Minhui Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+J">Jiandong Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Singh%2C+R+K">Rakesh K. Singh</a>, <a href="/search/cond-mat?searchtype=author&query=Xi%2C+X+X">X. X. Xi</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1610.06885v1-abstract-short" style="display: inline;"> Advancements in nanoscale engineering of oxide interfaces and heterostructures have led to discoveries of emergent phenomena and new artificial materials. Combining the strengths of reactive molecular-beam epitaxy and pulsed-laser deposition, we show here, with examples of Sr1+xTi1-xO3+delta, Ruddlesden-Popper phase Lan+1NinO3n+1 (n = 4), and LaAl1+yO3(1+0.5y)/SrTiO3 interfaces, that atomic layer-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.06885v1-abstract-full').style.display = 'inline'; document.getElementById('1610.06885v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.06885v1-abstract-full" style="display: none;"> Advancements in nanoscale engineering of oxide interfaces and heterostructures have led to discoveries of emergent phenomena and new artificial materials. Combining the strengths of reactive molecular-beam epitaxy and pulsed-laser deposition, we show here, with examples of Sr1+xTi1-xO3+delta, Ruddlesden-Popper phase Lan+1NinO3n+1 (n = 4), and LaAl1+yO3(1+0.5y)/SrTiO3 interfaces, that atomic layer-by-layer laser molecular-beam epitaxy (ALL-Laser MBE) significantly advances the state of the art in constructing oxide materials with atomic layer precision and control over stoichiometry. With ALL-Laser MBE we have produced conducting LaAlO3/SrTiO3 interfaces at high oxygen pressures that show no evidence of oxygen vacancies, a capability not accessible by existing techniques. The carrier density of the interfacial two-dimensional electron gas thus obtained agrees quantitatively with the electronic reconstruction mechanism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.06885v1-abstract-full').style.display = 'none'; document.getElementById('1610.06885v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1608.04405">arXiv:1608.04405</a> <span> [<a href="https://arxiv.org/pdf/1608.04405">pdf</a>, <a href="https://arxiv.org/format/1608.04405">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/npjquantmats.2016.9">10.1038/npjquantmats.2016.9 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Anomalous orbital structure in a spinel-perovskite interface $纬$-Al$_2$O$_3$/SrTiO$_3$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Middey%2C+S">S. Middey</a>, <a href="/search/cond-mat?searchtype=author&query=Meyers%2C+D">D. Meyers</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Zhong%2C+Z">Z. Zhong</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+J+-">J. -W. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Ryan%2C+P+J">P. J. Ryan</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">J. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1608.04405v1-abstract-short" style="display: inline;"> In all archetypical reported (001)-oriented perovskite heterostructures, it has been deduced that the preferential occupation of two-dimensional electron gases is in-plane $d_\textrm{xy}$ state. In sharp contrast to this, the investigated electronic structure of a spinel-perovskite heterostructure $纬$-Al$_2$O$_3$/SrTiO$_3$ by resonant soft X-ray linear dichroism, demonstrates that the preferential… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.04405v1-abstract-full').style.display = 'inline'; document.getElementById('1608.04405v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1608.04405v1-abstract-full" style="display: none;"> In all archetypical reported (001)-oriented perovskite heterostructures, it has been deduced that the preferential occupation of two-dimensional electron gases is in-plane $d_\textrm{xy}$ state. In sharp contrast to this, the investigated electronic structure of a spinel-perovskite heterostructure $纬$-Al$_2$O$_3$/SrTiO$_3$ by resonant soft X-ray linear dichroism, demonstrates that the preferential occupation is out-of-plane $d_\textrm{xz}$/$d_\textrm{yz}$ states for interfacial electrons. Moreover, the impact of strain further corroborates that this anomalous orbital structure can be linked to the altered crystal field at the interface and symmetry breaking of the interfacial structural units. Our findings provide another interesting route to engineer emergent quantum states with deterministic orbital symmetry. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1608.04405v1-abstract-full').style.display = 'none'; document.getElementById('1608.04405v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> npj Quantum Materials 1, 16009 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1605.07209">arXiv:1605.07209</a> <span> [<a href="https://arxiv.org/pdf/1605.07209">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/ncomms12264">10.1038/ncomms12264 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Beyond the Interface Limit: Structural and Magnetic Depth Profiles of Voltage-Controlled Magneto-Ionic Heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Gilbert%2C+D+A">Dustin A. Gilbert</a>, <a href="/search/cond-mat?searchtype=author&query=Grutter%2C+A+J">Alexander J. Grutter</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+K">Kai Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Kirby%2C+B+J">B. J. Kirby</a>, <a href="/search/cond-mat?searchtype=author&query=Borchers%2C+J+A">Julie A. Borchers</a>, <a href="/search/cond-mat?searchtype=author&query=Maranville%2C+B+B">Brian B. Maranville</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1605.07209v1-abstract-short" style="display: inline;"> Electric-field control of magnetism provides a promising route towards ultralow power information storage and sensor technologies. The effects of magneto-ionic motion have so far been prominently featured in the direct modification of interface chemical and physical characteristics. Here we demonstrate magnetoelectric coupling moderated by voltage-driven oxygen migration beyond the interface limit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.07209v1-abstract-full').style.display = 'inline'; document.getElementById('1605.07209v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1605.07209v1-abstract-full" style="display: none;"> Electric-field control of magnetism provides a promising route towards ultralow power information storage and sensor technologies. The effects of magneto-ionic motion have so far been prominently featured in the direct modification of interface chemical and physical characteristics. Here we demonstrate magnetoelectric coupling moderated by voltage-driven oxygen migration beyond the interface limit in relatively thick AlOx/GdOx/Co (15 nm) films. Oxygen migration and its ramifications on the Co magnetization are quantitatively mapped with polarized neutron reflectometry under thermal and electro-thermal conditionings. The depth-resolved profiles uniquely identify interfacial and bulk behaviors and a semi-reversible suppression and recovery of the magnetization. Magnetometry measurements show that the conditioning changes the microstructure so as to disrupt long-range ferromagnetic ordering, resulting in an additional magnetically soft phase. X-ray spectroscopy confirms electric field induced changes in the Co oxidation state but not in the Gd, suggesting that the GdOx transmits oxygen but does not source or sink it. These results together provide crucial insight into controlling magnetic heterostructures via magneto-ionic motion, not only at the interface, but also throughout the bulk of the films. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1605.07209v1-abstract-full').style.display = 'none'; document.getElementById('1605.07209v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications, 7, 12264 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.03794">arXiv:1603.03794</a> <span> [<a href="https://arxiv.org/pdf/1603.03794">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1073/pnas.1524689113">10.1073/pnas.1524689113 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Atomic-scale control of magnetic anisotropy via novel spin-orbit coupling effect in La2/3Sr1/3MnO3/SrIrO3 superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yi%2C+D">Di Yi</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+J">Jian Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Hsu%2C+S">Shang-Lin Hsu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+L">Lipeng Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+Y">Yongseong Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+J">Jong-Woo Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Z">Zuhuang Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Clarkson%2C+J">James Clarkson</a>, <a href="/search/cond-mat?searchtype=author&query=Serrao%2C+C+R">Claudy R. Serrao</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Ryan%2C+P+J">Philip J. Ryan</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+H">Haixuan Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Birgeneau%2C+R+J">Robert J. Birgeneau</a>, <a href="/search/cond-mat?searchtype=author&query=Ramesh%2C+R">Ramamoorthy Ramesh</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1603.03794v2-abstract-short" style="display: inline;"> Magnetic anisotropy (MA) is one of the most important material properties for modern spintronic devices. Conventional manipulation of the intrinsic MA, i.e. magnetocrystalline anisotropy (MCA), typically depends upon crystal symmetry. Extrinsic control over the MA is usually achieved by introducing shape anisotropy or exchange bias from another magnetically ordered material. Here we demonstrate a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.03794v2-abstract-full').style.display = 'inline'; document.getElementById('1603.03794v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.03794v2-abstract-full" style="display: none;"> Magnetic anisotropy (MA) is one of the most important material properties for modern spintronic devices. Conventional manipulation of the intrinsic MA, i.e. magnetocrystalline anisotropy (MCA), typically depends upon crystal symmetry. Extrinsic control over the MA is usually achieved by introducing shape anisotropy or exchange bias from another magnetically ordered material. Here we demonstrate a pathway to manipulate MA of 3d transition metal oxides (TMOs) by digitally inserting non-magnetic 5d TMOs with pronounced spin-orbit coupling (SOC). High quality superlattices comprised of ferromagnetic La2/3Sr1/3MnO3 (LSMO) and paramagnetic SrIrO3 (SIO) are synthesized with the precise control of thickness at atomic scale. Magnetic easy axis reorientation is observed by controlling the dimensionality of SIO, mediated through the emergence of a novel spin-orbit state within the nominally paramagnetic SIO. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.03794v2-abstract-full').style.display = 'none'; document.getElementById('1603.03794v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Proceedings of the National Academy of Sciences, May 2016</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1603.01164">arXiv:1603.01164</a> <span> [<a href="https://arxiv.org/pdf/1603.01164">pdf</a>, <a href="https://arxiv.org/format/1603.01164">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.94.161119">10.1103/PhysRevB.94.161119 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of collective excitations in VO$_2$ by resonant inelastic X-ray scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=He%2C+H">Haowei He</a>, <a href="/search/cond-mat?searchtype=author&query=Gray%2C+A+X">A. X. Gray</a>, <a href="/search/cond-mat?searchtype=author&query=Granitzka%2C+P">P. Granitzka</a>, <a href="/search/cond-mat?searchtype=author&query=Jeong%2C+J+W">J. W. Jeong</a>, <a href="/search/cond-mat?searchtype=author&query=Aetukuri%2C+N+P">N. P. Aetukuri</a>, <a href="/search/cond-mat?searchtype=author&query=Kukreja%2C+R">R. Kukreja</a>, <a href="/search/cond-mat?searchtype=author&query=Miao%2C+L">Lin Miao</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+Y+B">Y. B. Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Olalde-Velasco%2C+P">P. Olalde-Velasco</a>, <a href="/search/cond-mat?searchtype=author&query=Pelliciari%2C+J">J. Pelliciari</a>, <a href="/search/cond-mat?searchtype=author&query=Schlotter%2C+W+F">W. F. Schlotter</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Schmitt%2C+T">T. Schmitt</a>, <a href="/search/cond-mat?searchtype=author&query=Samant%2C+M+G">M. G. Samant</a>, <a href="/search/cond-mat?searchtype=author&query=Parkin%2C+S+S+P">S. S. P. Parkin</a>, <a href="/search/cond-mat?searchtype=author&query=D%C3%BCrr%2C+H+A">H. A. D眉rr</a>, <a href="/search/cond-mat?searchtype=author&query=Wray%2C+L+A">L. Andrew Wray</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1603.01164v1-abstract-short" style="display: inline;"> Vanadium dioxide is of broad interest as a spin-1/2 electron system that realizes a metal-insulator transition near room temperature, due to a combination of strongly correlated and itinerant electron physics. Here, resonant inelastic X-ray scattering is used to measure the excitation spectrum of charge, spin, and lattice degrees of freedom at the vanadium L-edge under different polarization and t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.01164v1-abstract-full').style.display = 'inline'; document.getElementById('1603.01164v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1603.01164v1-abstract-full" style="display: none;"> Vanadium dioxide is of broad interest as a spin-1/2 electron system that realizes a metal-insulator transition near room temperature, due to a combination of strongly correlated and itinerant electron physics. Here, resonant inelastic X-ray scattering is used to measure the excitation spectrum of charge, spin, and lattice degrees of freedom at the vanadium L-edge under different polarization and temperature conditions. These spectra reveal the evolution of energetics across the metal-insulator transition, including the low temperature appearance of a strong candidate for the singlet-triplet excitation of a vanadium dimer. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1603.01164v1-abstract-full').style.display = 'none'; document.getElementById('1603.01164v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 March, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 94, 161119(R) (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1602.05597">arXiv:1602.05597</a> <span> [<a href="https://arxiv.org/pdf/1602.05597">pdf</a>, <a href="https://arxiv.org/format/1602.05597">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.116.076802">10.1103/PhysRevLett.116.076802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetic interactions at the nanoscale in trilayer titanates LaTiO$_3$/SrTiO$_3$/YTiO$_3$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yanwei Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+Z">Zhenzhong Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Kareev%2C+M">M. Kareev</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Meyers%2C+D">D. Meyers</a>, <a href="/search/cond-mat?searchtype=author&query=Middey%2C+S">S. Middey</a>, <a href="/search/cond-mat?searchtype=author&query=Choudhury%2C+D">D. Choudhury</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">P. Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+J">Jiandong Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Freeland%2C+J+W">J. W. Freeland</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+L">Lin Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Chakhalian%2C+J">J. Chakhalian</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1602.05597v1-abstract-short" style="display: inline;"> We report on the phase diagram of competing magnetic interactions at nanoscale in engineered ultra-thin trilayer heterostructures of LaTiO$_{3}$/SrTiO$_{3}$/YTiO$_{3}$, in which the interfacial inversion symmetry is explicitly broken. Combined atomic layer resolved scanning transmission electron microscopy with electron energy loss spectroscopy and electrical transport have confirmed the formation… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05597v1-abstract-full').style.display = 'inline'; document.getElementById('1602.05597v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1602.05597v1-abstract-full" style="display: none;"> We report on the phase diagram of competing magnetic interactions at nanoscale in engineered ultra-thin trilayer heterostructures of LaTiO$_{3}$/SrTiO$_{3}$/YTiO$_{3}$, in which the interfacial inversion symmetry is explicitly broken. Combined atomic layer resolved scanning transmission electron microscopy with electron energy loss spectroscopy and electrical transport have confirmed the formation of a spatially separated two-dimensional electron liquid and high density two-dimensional localized magnetic moments at the LaTiO$_3$/SrTiO$_3$ and SrTiO$_3$/YTiO$_3$ interfaces, respectively. Resonant soft X-ray linear dichroism spectroscopy has demonstrated the presence of orbital polarization of the conductive LaTiO$_3$/SrTiO$_3$ and localized SrTiO$_3$/YTiO$_3$ electrons. Our results provide a route with prospects for exploring new magnetic interfaces, designing tunable two-dimensional $d$-electron Kondo lattice, and potential spin Hall applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1602.05597v1-abstract-full').style.display = 'none'; document.getElementById('1602.05597v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 February, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 116, 076802 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1601.07682">arXiv:1601.07682</a> <span> [<a href="https://arxiv.org/pdf/1601.07682">pdf</a>, <a href="https://arxiv.org/format/1601.07682">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/ncomms10852">10.1038/ncomms10852 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Observation of a Three-Dimensional Quasi-Long-Range Electronic Supermodulation in YBa2Cu3O7-x/La0.7Ca0.3MnO3 Heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=He%2C+J">Junfeng He</a>, <a href="/search/cond-mat?searchtype=author&query=Shafer%2C+P">Padraic Shafer</a>, <a href="/search/cond-mat?searchtype=author&query=Mion%2C+T+R">Thomas R. Mion</a>, <a href="/search/cond-mat?searchtype=author&query=Tra%2C+V+T">Vu Thanh Tra</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+Q">Qing He</a>, <a href="/search/cond-mat?searchtype=author&query=Kong%2C+J">J. Kong</a>, <a href="/search/cond-mat?searchtype=author&query=Chuang%2C+Y+-">Y. -D. Chuang</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+W+L">W. L. Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Graf%2C+M+J">M. J. Graf</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+J+-">J. -Y. Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Chu%2C+Y+-">Y. -H. Chu</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">E. Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+R">Rui-Hua He</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1601.07682v1-abstract-short" style="display: inline;"> Recent developments in high-temperature superconductivity highlight a generic tendency of the cuprates to develop competing electronic (charge) supermodulations. While coupled to the lattice and showing different characteristics in different materials, these supermodulations themselves are generally conceived to be quasi-two-dimensional, residing mainly in individual CuO2 planes, and poorly correl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.07682v1-abstract-full').style.display = 'inline'; document.getElementById('1601.07682v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1601.07682v1-abstract-full" style="display: none;"> Recent developments in high-temperature superconductivity highlight a generic tendency of the cuprates to develop competing electronic (charge) supermodulations. While coupled to the lattice and showing different characteristics in different materials, these supermodulations themselves are generally conceived to be quasi-two-dimensional, residing mainly in individual CuO2 planes, and poorly correlated along the c-axis. Here we observed with resonant elastic x-ray scattering a distinct type of electronic supermodulation in YBa2Cu3O7-x (YBCO) thin films grown epitaxially on La0.7Ca0.3MnO3 (LCMO). This supermodulation has a periodicity nearly commensurate with four lattice constants in-plane, eight out-of-plane, with long correlation lengths in three dimensions. It sets in far above the superconducting transition temperature and competes with superconductivity below this temperature for electronic states predominantly in the CuO2 plane. Our finding sheds new light on the nature of charge ordering in cuprates as well as a reported long-range proximity effect between superconductivity and ferromagnetism in YBCO/LCMO heterostructures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1601.07682v1-abstract-full').style.display = 'none'; document.getElementById('1601.07682v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 January, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Nature Communications, in press</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications 7, 10852 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.05901">arXiv:1512.05901</a> <span> [<a href="https://arxiv.org/pdf/1512.05901">pdf</a>, <a href="https://arxiv.org/format/1512.05901">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1109/TMAG.2015.2510544">10.1109/TMAG.2015.2510544 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Room temperature exchange bias in BiFeO3 / Co-Fe bilayers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sterwerf%2C+C">Christian Sterwerf</a>, <a href="/search/cond-mat?searchtype=author&query=Meinert%2C+M">Markus Meinert</a>, <a href="/search/cond-mat?searchtype=author&query=Arenholz%2C+E">Elke Arenholz</a>, <a href="/search/cond-mat?searchtype=author&query=Schmalhorst%2C+J">Jan-Michael Schmalhorst</a>, <a href="/search/cond-mat?searchtype=author&query=Reiss%2C+G">G眉nter Reiss</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.05901v3-abstract-short" style="display: inline;"> Thin highly epitaxial BiFeO$_3$ films were prepared on SrTiO$_3$ (100) substrates by reactive magnetron co-sputtering. Detailed MOKE measurements on BiFeO$_3$/Co-Fe bilayers were performed to investigate the exchange bias as a function of the films thicknesses and Co-Fe stoichiometries. We found a maximum exchange bias of H$_{\mathrm{eb}}$=92 Oe and a coercive field of H$_{\mathrm{c}}$=89 Oe for a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.05901v3-abstract-full').style.display = 'inline'; document.getElementById('1512.05901v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.05901v3-abstract-full" style="display: none;"> Thin highly epitaxial BiFeO$_3$ films were prepared on SrTiO$_3$ (100) substrates by reactive magnetron co-sputtering. Detailed MOKE measurements on BiFeO$_3$/Co-Fe bilayers were performed to investigate the exchange bias as a function of the films thicknesses and Co-Fe stoichiometries. We found a maximum exchange bias of H$_{\mathrm{eb}}$=92 Oe and a coercive field of H$_{\mathrm{c}}$=89 Oe for a 12.5 nm thick BiFeO$_3$ film with a 2 nm thick Co layer. The unidirectional anisotropy is clearly visible in in-plane rotational MOKE measurements. AMR measurements reveal a strongly increasing coercivity with decreasing temperature, but no significant change in the exchange bias field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.05901v3-abstract-full').style.display = 'none'; document.getElementById('1512.05901v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> </li> </ol> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Arenholz%2C+E&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Arenholz%2C+E&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Arenholz%2C+E&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> </ul> </nav> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

CINXE.COM

Search | arXiv e-print repository