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 1,283 results for author: <span class="mathjax">Li, Z</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=Li%2C+Z">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="Li, Z"> </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=Li%2C+Z&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="Li, Z"> <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=Li%2C+Z&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=100" class="pagination-link " aria-label="Page 3" aria-current="page">3 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=150" class="pagination-link " aria-label="Page 4" aria-current="page">4 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=200" class="pagination-link " aria-label="Page 5" aria-current="page">5 </a> </li> <li><span class="pagination-ellipsis">…</span></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/2502.19259">arXiv:2502.19259</a> <span> [<a href="https://arxiv.org/pdf/2502.19259">pdf</a>, <a href="https://arxiv.org/ps/2502.19259">ps</a>, <a href="https://arxiv.org/format/2502.19259">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"> U(1) Dirac quantum spin liquid candidate in triangular-lattice antiferromagnet CeMgAl$_{11}$O$_{19}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yantao Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Koda%2C+A">Akihiro Koda</a>, <a href="/search/cond-mat?searchtype=author&query=Le%2C+M+D">M. D. Le</a>, <a href="/search/cond-mat?searchtype=author&query=Pomjakushin%2C+V">V. Pomjakushin</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+B">Benqiong Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Fu%2C+Z">Zhendong Fu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhiwei Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+J">Jinkui Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Tian%2C+Z">Zhaoming Tian</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+H">Hanjie Guo</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="2502.19259v1-abstract-short" style="display: inline;"> Quantum spin liquid represents an intriguing state where electron spins are highly entangled yet spin fluctuation persists even at 0 K. Recently, the hexaaluminates \textit{R}MgAl$_{11}$O$_{19}$ (\textit{R} = rare earth) have been proposed to be a platform for realizing the quantum spin liquid state with dominant Ising anisotropic correlations. Here, we report detailed low-temperature magnetic sus… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.19259v1-abstract-full').style.display = 'inline'; document.getElementById('2502.19259v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.19259v1-abstract-full" style="display: none;"> Quantum spin liquid represents an intriguing state where electron spins are highly entangled yet spin fluctuation persists even at 0 K. Recently, the hexaaluminates \textit{R}MgAl$_{11}$O$_{19}$ (\textit{R} = rare earth) have been proposed to be a platform for realizing the quantum spin liquid state with dominant Ising anisotropic correlations. Here, we report detailed low-temperature magnetic susceptibility, muon spin relaxation, and thermodynamic studies on the CeMgAl$_{11}$O$_{19}$ single crystal. Ising anisotropy is revealed by magnetic susceptibility measurements. Muon spin relaxation and ac susceptibility measurements rule out any long-range magnetic ordering or spin freezing down to 50 mK despite the onset of spin correlations below $\sim$0.8 K. Instead, the spins keep fluctuating at a rate of 1.0(2) MHz at 50 mK. Specific heat results indicate a gapless excitation with a power-law dependence on temperature, $C_m(T) \propto T^伪$. The quasi-quadratic temperature dependence with $伪$ = 2.28(4) in zero field and linear temperature dependence in 0.25 T support the possible realization of the U(1) Dirac quantum spin liquid state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.19259v1-abstract-full').style.display = 'none'; document.getElementById('2502.19259v1-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, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </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 Sci. China - Phys. Mech. Astron. 7 pages main text + 8 pages supplementary 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/2502.19034">arXiv:2502.19034</a> <span> [<a href="https://arxiv.org/pdf/2502.19034">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"> Enhanced deep-freezing magneto- and elasto-caloric effects by modifying lattice anharmonicity and electronic structures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Huang%2C+X">Xiao-Ming Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+Y">Ying Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Hao%2C+X">Xiaowen Hao</a>, <a href="/search/cond-mat?searchtype=author&query=Xiang%2C+H">Hua-You Xiang</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+J">Jin-Han Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+C">Chin-Wei Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+W">Wenyun Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+C">Cuiping Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+B">Binru Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Ma%2C+J">Jie Ma</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zongbin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Kuang%2C+Y">Yafei Kuang</a>, <a href="/search/cond-mat?searchtype=author&query=Zuo%2C+L">Liang Zuo</a>, <a href="/search/cond-mat?searchtype=author&query=Tong%2C+X">Xin Tong</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+H">Hai-Le Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Ren%2C+Q">Qingyong Ren</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="2502.19034v1-abstract-short" style="display: inline;"> Designing the high performance magneto or elastocaloric effect in NiMnIn alloys with spin-lattice coupling in a deep freezing temperature range of 200 K to 255 K is challenging due to the limited lattice entropy change and large negative contribution of magnetic entropy change during phase transitions. In this work, we systematically study the first order magneto-structural transition in NiMnIn ba… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.19034v1-abstract-full').style.display = 'inline'; document.getElementById('2502.19034v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.19034v1-abstract-full" style="display: none;"> Designing the high performance magneto or elastocaloric effect in NiMnIn alloys with spin-lattice coupling in a deep freezing temperature range of 200 K to 255 K is challenging due to the limited lattice entropy change and large negative contribution of magnetic entropy change during phase transitions. In this work, we systematically study the first order magneto-structural transition in NiMnIn based alloys by in-situ microstructural characterizations, physical property measurements, and first principles calculations. A multi element alloying strategy involving Cu and Ga co doping is proposed to manipulate the phase transition. The co doping reduces the lattice anharmonicity and thermal expansion coefficient of the martensitic phase, leading to an increase in the unit cell volume change and lattice entropy change. It also modifies the electronic density of states, causing a decrease in the magnetization change .The relief of the lattice mismatch reduces hysteresis losses in the refrigeration cycle. These synergetic effects yield excellent magneto and elastocaloric effects,with the effective magnetocaloric refrigeration capacity reaching up to 182 J/kg under the magnetic field of 5 T or an adiabatic temperature change of -4 K under a low field of 1.5 T and the elastocaloric coefficient of performance to 30 or an adiabatic temperature change of -7 K with the strain of 5% at 230 K, offering a potential solution for solid-state deep-freezing refrigeration. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.19034v1-abstract-full').style.display = 'none'; document.getElementById('2502.19034v1-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, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.18857">arXiv:2502.18857</a> <span> [<a href="https://arxiv.org/pdf/2502.18857">pdf</a>, <a href="https://arxiv.org/format/2502.18857">other</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> <p class="title is-5 mathjax"> Physics-Aware Inverse Design for Nanowire Single-Photon Avalanche Detectors via Deep Learning </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+B">Boyang Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhe Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Z">Zhongju Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+Y">Yang Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Tan%2C+H+H">Hark Hoe Tan</a>, <a href="/search/cond-mat?searchtype=author&query=Jagadish%2C+C">Chennupati Jagadish</a>, <a href="/search/cond-mat?searchtype=author&query=Dong%2C+D">Daoyi Dong</a>, <a href="/search/cond-mat?searchtype=author&query=Fu%2C+L">Lan Fu</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="2502.18857v1-abstract-short" style="display: inline;"> Single-photon avalanche detectors (SPADs) have enabled various applications in emerging photonic quantum information technologies in recent years. However, despite many efforts to improve SPAD's performance, the design of SPADs remained largely an iterative and time-consuming process where a designer makes educated guesses of a device structure based on empirical reasoning and solves the semicondu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.18857v1-abstract-full').style.display = 'inline'; document.getElementById('2502.18857v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.18857v1-abstract-full" style="display: none;"> Single-photon avalanche detectors (SPADs) have enabled various applications in emerging photonic quantum information technologies in recent years. However, despite many efforts to improve SPAD's performance, the design of SPADs remained largely an iterative and time-consuming process where a designer makes educated guesses of a device structure based on empirical reasoning and solves the semiconductor drift-diffusion model for it. In contrast, the inverse problem, i.e., directly inferring a structure needed to achieve desired performance, which is of ultimate interest to designers, remains an unsolved problem. We propose a novel physics-aware inverse design workflow for SPADs using a deep learning model and demonstrate it with an example of finding the key parameters of semiconductor nanowires constituting the unit cell of an SPAD, given target photon detection efficiency. Our inverse design workflow is not restricted to the case demonstrated and can be applied to design conventional planar structure-based SPADs, photodetectors, and solar cells. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.18857v1-abstract-full').style.display = 'none'; document.getElementById('2502.18857v1-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, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.18385">arXiv:2502.18385</a> <span> [<a href="https://arxiv.org/pdf/2502.18385">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="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> </div> </div> <p class="title is-5 mathjax"> Monolithic On-Chip Phononic Chiral Anomalous Bulk States on LiNbO3 Thin-films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhe Li</a>, <a href="/search/cond-mat?searchtype=author&query=Qin%2C+Z">Zhen-Hui Qin</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+S">Shu-Mao Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Hao%2C+C">Chen-Bei Hao</a>, <a href="/search/cond-mat?searchtype=author&query=Pan%2C+F">Fan-Yun Pan</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+H">Hao Yan</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+Y">Yi-Han He</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+Y">Yan-Shen Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+X">Xue-Jun Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+S">Si-Yuan Yu</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+C">Cheng He</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+M">Ming-Hui Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Y">Yan-Feng Chen</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="2502.18385v1-abstract-short" style="display: inline;"> Phononic materials are crucial for developing efficient, robust mechanical waveguides with strong transport properties, enabling advances in sensing, signal processing, energy harvesting, and microfluidics. A key motivation is their integration into monolithic systems for on-chip applications. While topological phononic materials developed in the past decade offer unidirectional edge states immune… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.18385v1-abstract-full').style.display = 'inline'; document.getElementById('2502.18385v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.18385v1-abstract-full" style="display: none;"> Phononic materials are crucial for developing efficient, robust mechanical waveguides with strong transport properties, enabling advances in sensing, signal processing, energy harvesting, and microfluidics. A key motivation is their integration into monolithic systems for on-chip applications. While topological phononic materials developed in the past decade offer unidirectional edge states immune to backscattering, their integration requires large volumes to control localized small volumes' transport properties, limiting their efficiency and application in modern phononic circuits. The recently introduced chiral anomalous bulk states (CABSs) combine the advantages of topological materials with innovative boundary designs, overcoming transmission limitations and ensuring full material utilization for superior wave propagation. Here, we present the first on-chip monolithic CABS device integrated on a suspended LiNbO3 thin film. This breakthrough enables the creation of phononic waveguides with unmatched unidirectionality, low loss, and high transmission efficiency, seamlessly integrated with broadband piezoelectric transducers, and showcasing their potential for high-fidelity, broad-bandwidth microwave signal transmission. Additionally, we exploit the slow-wave characteristics of CABSs for delay lines and high-density signal processing. Tailoring wave propagation through boundary engineering opens a new paradigm for phononic/photonic device design, with implications across microelectronics, high-frequency communications, radar, and advanced sensing technologies. The work sets the stage for the future development of highly scalable, multifunctional, and robust phononic systems, unlocking new avenues for integrated acoustic technologies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.18385v1-abstract-full').style.display = 'none'; document.getElementById('2502.18385v1-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, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.16984">arXiv:2502.16984</a> <span> [<a href="https://arxiv.org/pdf/2502.16984">pdf</a>, <a href="https://arxiv.org/format/2502.16984">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="Machine Learning">cs.LG</span> </div> </div> <p class="title is-5 mathjax"> Active Learning for Conditional Inverse Design with Crystal Generation and Foundation Atomic Models </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhuoyuan Li</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+S">Siyu Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Ye%2C+B">Beilin Ye</a>, <a href="/search/cond-mat?searchtype=author&query=Srolovitz%2C+D+J">David J. Srolovitz</a>, <a href="/search/cond-mat?searchtype=author&query=Wen%2C+T">Tongqi Wen</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="2502.16984v1-abstract-short" style="display: inline;"> Artificial intelligence (AI) is transforming materials science, enabling both theoretical advancements and accelerated materials discovery. Recent progress in crystal generation models, which design crystal structures for targeted properties, and foundation atomic models (FAMs), which capture interatomic interactions across the periodic table, has significantly improved inverse materials design. H… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.16984v1-abstract-full').style.display = 'inline'; document.getElementById('2502.16984v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.16984v1-abstract-full" style="display: none;"> Artificial intelligence (AI) is transforming materials science, enabling both theoretical advancements and accelerated materials discovery. Recent progress in crystal generation models, which design crystal structures for targeted properties, and foundation atomic models (FAMs), which capture interatomic interactions across the periodic table, has significantly improved inverse materials design. However, an efficient integration of these two approaches remains an open challenge. Here, we present an active learning framework that combines crystal generation models and foundation atomic models to enhance the accuracy and efficiency of inverse design. As a case study, we employ Con-CDVAE to generate candidate crystal structures and MACE-MP-0 FAM as one of the high-throughput screeners for bulk modulus evaluation. Through iterative active learning, we demonstrate that Con-CDVAE progressively improves its accuracy in generating crystals with target properties, highlighting the effectiveness of a property-driven fine-tuning process. Our framework is general to accommodate different crystal generation and foundation atomic models, and establishes a scalable approach for AI-driven materials discovery. By bridging generative modeling with atomic-scale simulations, this work paves the way for more accurate and efficient inverse materials design. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.16984v1-abstract-full').style.display = 'none'; document.getElementById('2502.16984v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.16353">arXiv:2502.16353</a> <span> [<a href="https://arxiv.org/pdf/2502.16353">pdf</a>, <a href="https://arxiv.org/format/2502.16353">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="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Full-film dry transfer of MBE-grown van der Waals materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Ziling Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+W">Wenyi Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Swann%2C+M">Matthew Swann</a>, <a href="/search/cond-mat?searchtype=author&query=Vorona%2C+V">Vika Vorona</a>, <a href="/search/cond-mat?searchtype=author&query=Scott%2C+H">Haley Scott</a>, <a href="/search/cond-mat?searchtype=author&query=Kawakami%2C+R+K">Roland K. Kawakami</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="2502.16353v1-abstract-short" style="display: inline;"> Molecular beam epitaxy (MBE) has been used to create high-quality, large-scale two-dimensional van der Waals (2D vdW) materials. However, due to the strong adhesion between the substrate and deposited materials, the peel-off and dry transfer of MBE-grown vdW films onto other substrates has been challenging. This limits the study and use of MBE films for heterogeneous integration including stacked… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.16353v1-abstract-full').style.display = 'inline'; document.getElementById('2502.16353v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.16353v1-abstract-full" style="display: none;"> Molecular beam epitaxy (MBE) has been used to create high-quality, large-scale two-dimensional van der Waals (2D vdW) materials. However, due to the strong adhesion between the substrate and deposited materials, the peel-off and dry transfer of MBE-grown vdW films onto other substrates has been challenging. This limits the study and use of MBE films for heterogeneous integration including stacked and twisted heterostructures. In this work, we develop a polymer-assisted dry transfer method and successfully perform full-film transfer of various MBE-grown 2D vdW materials including transition metal dichalcogenides (TMD), topological insulators (TI) and 2D magnets. In particular, we transfer air-sensitive 2D magnets, characterize their magnetic properties, and compare them with as-grown materials. The results show that the transfer technique does not degrade the magnetic properties, with the Curie temperature and hysteresis loops exhibiting similar behaviors after the transfer. Our results enable further development of heterogeneous integration of 2D vdW materials based on MBE growth. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.16353v1-abstract-full').style.display = 'none'; document.getElementById('2502.16353v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </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/2502.14633">arXiv:2502.14633</a> <span> [<a href="https://arxiv.org/pdf/2502.14633">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> </div> <p class="title is-5 mathjax"> Superconductivity Favored Anisotropic Phase Stiffness in Infinite-Layer Nickelates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Xu%2C+M">Minyi Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Qiu%2C+D">Dong Qiu</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+M">Minghui Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+Y">Yehao Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+C">Cheng Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+C">Chao Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+W">Wenjie Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Nie%2C+Y">Yuefeng Nie</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zi-Xiang Li</a>, <a href="/search/cond-mat?searchtype=author&query=Xiang%2C+T">Tao Xiang</a>, <a href="/search/cond-mat?searchtype=author&query=Qiao%2C+L">Liang Qiao</a>, <a href="/search/cond-mat?searchtype=author&query=Xiong%2C+J">Jie Xiong</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Y">Yanrong Li</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="2502.14633v1-abstract-short" style="display: inline;"> In unconventional superconductors such as cuprates and iron pnictides and chalcogenides, phase stiffness - a measure of the energy cost associated with superconducting phase variations - is on the same order of magnitude as the strength of Cooper pairing, translating to superconductivity governed by phase fluctuations. However, due to a lack of a direct experimental probe, there remains a fundamen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.14633v1-abstract-full').style.display = 'inline'; document.getElementById('2502.14633v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.14633v1-abstract-full" style="display: none;"> In unconventional superconductors such as cuprates and iron pnictides and chalcogenides, phase stiffness - a measure of the energy cost associated with superconducting phase variations - is on the same order of magnitude as the strength of Cooper pairing, translating to superconductivity governed by phase fluctuations. However, due to a lack of a direct experimental probe, there remains a fundamental gap in establishing microscopic picture between unconventional superconductivity and phase fluctuations. Here we show a vector current technique that allows for in-situ angle-resolved transport measurements, providing exclusive evidence suggesting an anisotropic nature of phase stiffness in infinite-layer nickelate superconductors. Pronounced anisotropy of in-plane resistance manifests itself in both normal and superconducting transition states, indicating crystal symmetry breaking. Remarkably, the electric conductivity of Nd0.8Sr0.2NiO2 peaks at 125掳 between the direction of the current and crystal principal axis, but this angle evolves to 160掳 near zero-resistance temperature. Further measurements reveal that the superconductivity is favored along a direction with minimized phase fluctuations, an orientation strikingly deviating from the symmetric direction imposed by both electronic anisotropy and the underlying crystal lattice. Identical measurements conducted on a prototypical cuprate superconductor yield consistent results, suggesting that this previously unknown behavior could be ubiquitous. By shielding insight into the contrasting anisotropy between electron fluid and superfluid, our findings provide clues for a unified framework for understanding unconventional superconductors <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.14633v1-abstract-full').style.display = 'none'; document.getElementById('2502.14633v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.14138">arXiv:2502.14138</a> <span> [<a href="https://arxiv.org/pdf/2502.14138">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> </div> <p class="title is-5 mathjax"> Moir茅-Tunable Localization of Simultaneous Type I and Type II Band Alignment in a MoSe2/WS2 Heterobilayer </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Guo%2C+J">Jiaxuan Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Withers%2C+Z+H">Zachary H. Withers</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Ziling Li</a>, <a href="/search/cond-mat?searchtype=author&query=Hou%2C+B">Bowen Hou</a>, <a href="/search/cond-mat?searchtype=author&query=Adler%2C+A">Alexander Adler</a>, <a href="/search/cond-mat?searchtype=author&query=Ding%2C+J">Jianwei Ding</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+V+C">Victor Chang Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Kawakami%2C+R+K">Roland K. Kawakami</a>, <a href="/search/cond-mat?searchtype=author&query=Sch%C3%B6nhense%2C+G">Gerd Sch枚nhense</a>, <a href="/search/cond-mat?searchtype=author&query=Kunin%2C+A">Alice Kunin</a>, <a href="/search/cond-mat?searchtype=author&query=Allison%2C+T+K">Thomas K. Allison</a>, <a href="/search/cond-mat?searchtype=author&query=Qiu%2C+D+Y">Diana Y. 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="2502.14138v1-abstract-short" style="display: inline;"> Moir茅 heterobilayers exhibiting spatially varying band alignment and electron and hole localization that can be precisely controlled through the twist angle have emerged as exciting platforms for studying complex quantum phenomena. While most heterobilayers of transition metal dichalcogenides (TMDs) have a type II band alignment, the introduction of type I band alignment could enable stronger ligh… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.14138v1-abstract-full').style.display = 'inline'; document.getElementById('2502.14138v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.14138v1-abstract-full" style="display: none;"> Moir茅 heterobilayers exhibiting spatially varying band alignment and electron and hole localization that can be precisely controlled through the twist angle have emerged as exciting platforms for studying complex quantum phenomena. While most heterobilayers of transition metal dichalcogenides (TMDs) have a type II band alignment, the introduction of type I band alignment could enable stronger light-matter coupling and enhanced radiative emission. Here, we show through a combination of first-principles GW plus Bethe Salpeter equation (GW-BSE) calculations and time- and angle-resolved photoemission spectroscopy (tr-ARPES) measurements that contrary to previous understanding, the MoSe2/WS2 heterobilayer has a type I band alignment at large twist angles and simultaneous regions of type I and type II band alignment due to the structural reconstruction in different high symmetry regions at small twist angles. In tr-ARPES, consistent with our calculations, a long-lived electron population is only observed in MoSe2 for samples with large twist angles, while in samples with small twist angles, signals from two distinct long-lived excitons are observed. Moreover, despite the near degeneracy of the conduction bands of the two layers, no excitonic hybridization occurs, suggesting that previously observed absorption peaks in this material arise from lattice reconstruction. Our findings clarify the complex energy landscape in MoSe2/WS2 heterostructures, where the coexistence of type I and type II band alignment opens the door to moir茅-tunable optoelectronic devices with intrinsic lateral heterojunctions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.14138v1-abstract-full').style.display = 'none'; document.getElementById('2502.14138v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.13712">arXiv:2502.13712</a> <span> [<a href="https://arxiv.org/pdf/2502.13712">pdf</a>, <a href="https://arxiv.org/format/2502.13712">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="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Silicon oxide nanoparticles grown on graphite by codeposition of the atomic constituents </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Holleufer%2C+S+F">Steffen Friis Holleufer</a>, <a href="/search/cond-mat?searchtype=author&query=Hopkinson%2C+A">Alfred Hopkinson</a>, <a href="/search/cond-mat?searchtype=author&query=Sutherland%2C+D+S">Duncan S. Sutherland</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zheshen Li</a>, <a href="/search/cond-mat?searchtype=author&query=Lauritsen%2C+J+V">Jeppe V. Lauritsen</a>, <a href="/search/cond-mat?searchtype=author&query=Hornek%C3%A6r%2C+L">Liv Hornek忙r</a>, <a href="/search/cond-mat?searchtype=author&query=Cassidy%2C+A">Andrew Cassidy</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="2502.13712v1-abstract-short" style="display: inline;"> Nanoscale silicate dust particles are the most abundant refractory component observed in the interstellar medium and thought to play a key role in catalysing the formation of complex organic molecules in the star forming regions of space. We present a method to synthesise a laboratory analogue of nanoscale silicate dust particles on highly oriented pyrolytic graphite (HOPG) substrates by co-deposi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.13712v1-abstract-full').style.display = 'inline'; document.getElementById('2502.13712v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.13712v1-abstract-full" style="display: none;"> Nanoscale silicate dust particles are the most abundant refractory component observed in the interstellar medium and thought to play a key role in catalysing the formation of complex organic molecules in the star forming regions of space. We present a method to synthesise a laboratory analogue of nanoscale silicate dust particles on highly oriented pyrolytic graphite (HOPG) substrates by co-deposition of the atomic constituents. The resulting nanoparticulate films are sufficiently thin and conducting to allow for surface science investigations, and are characterised here, in situ under UHV, using X-ray photoelectron spectroscopy, near-edge X-ray absorption atomic fine spectroscopy and scanning tunnelling microscopy, and, ex situ, using scanning electron microscopy. We compare SiO$_{x}$ film growth with and without the use of atomic O beams during synthesis and conclude that exposure of the sample to atomic O leads to homogeneous films of interconnected nanoparticle networks. The networks covers the graphite substrate and demonstrate superior thermal stability, up to 1073 K, when compared to oxides produced without exposure to atomic O. In addition, control over the flux of atomic O during growth allows for control of the average oxidation state of the film produced. Photoelectron spectroscopy measurements demonstrate that fully oxidised films have an SiO$_{2}$ stoichiometry very close to bulk SiO$_{2}$ and scanning tunnelling microscopy images show the basic cluster building unit to have a radius of approximately 2.5 nm. The synthesis of SiO$_{x}$ films with adjustable stoichiometry and suitable for surface science experiments that require conducting substrates will be of great interest to the astrochemistry community, and will allow for nanoscale-investigation of the chemical processes thought to be catalysed at the surface of dust grains in space. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.13712v1-abstract-full').style.display = 'none'; document.getElementById('2502.13712v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.13503">arXiv:2502.13503</a> <span> [<a href="https://arxiv.org/pdf/2502.13503">pdf</a>, <a href="https://arxiv.org/format/2502.13503">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> </div> </div> <p class="title is-5 mathjax"> Emergent extended states in an unbounded quasiperiodic lattice </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+J">Jia-Ming Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+S">Shan-Zhong Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+S">Shi-Liang Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhi Li</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="2502.13503v1-abstract-short" style="display: inline;"> Previous studies have established that quasiperiodic lattice models with unbounded potentials can exhibit localized and multifractal states, yet preclude the existence of extended states. In this work, we introduce a quasiperiodic system that incorporates both unbounded potentials and unbounded hopping amplitudes, where extended states emerge as a direct consequence of the unbounded hopping terms… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.13503v1-abstract-full').style.display = 'inline'; document.getElementById('2502.13503v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.13503v1-abstract-full" style="display: none;"> Previous studies have established that quasiperiodic lattice models with unbounded potentials can exhibit localized and multifractal states, yet preclude the existence of extended states. In this work, we introduce a quasiperiodic system that incorporates both unbounded potentials and unbounded hopping amplitudes, where extended states emerge as a direct consequence of the unbounded hopping terms overcoming the localization constraints imposed by the unbounded potential, thereby facilitating enhanced particle transport. By using Avila's global theory, we derive analytical expressions for the phase boundaries, with exact results aligning closely with numerical simulations.Intriguingly, we uncover a hidden self-duality in the proposed model by establishing a mapping to the Aubry-Andr茅 model, revealing a profound structural connection between these systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.13503v1-abstract-full').style.display = 'none'; document.getElementById('2502.13503v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </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, 3 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/2502.11048">arXiv:2502.11048</a> <span> [<a href="https://arxiv.org/pdf/2502.11048">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"> Electrothermal manipulation of current-induced phase transitions in ferrimagnetic Mn$_3$Si$_2$Te$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Fang%2C+J">Jiaqi Fang</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+J">Jiawei Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+X">Xintian Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Y">Yaotian Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Yin%2C+Z">Zheng Yin</a>, <a href="/search/cond-mat?searchtype=author&query=Ying%2C+Z">Zhe Ying</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yunhao Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Z">Ziqiang Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhilin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+S">Shiyu Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+Y">Yang Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Pantelides%2C+S+T">Sokrates T. Pantelides</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+H">Hong-Jun Gao</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="2502.11048v1-abstract-short" style="display: inline;"> Phase transitions driven by external stimuli are central to condensed matter physics, providing critical insights into symmetry breaking and emergent phenomena. Recently, ferrimagnetic (FiM) Mn$_3$Si$_2$Te$_6$ has attracted considerable attention for its magnetic-field-induced insulator-metal transitions (IMTs) and unconventional current-driven phase transitions, yet the role of applied currents i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.11048v1-abstract-full').style.display = 'inline'; document.getElementById('2502.11048v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.11048v1-abstract-full" style="display: none;"> Phase transitions driven by external stimuli are central to condensed matter physics, providing critical insights into symmetry breaking and emergent phenomena. Recently, ferrimagnetic (FiM) Mn$_3$Si$_2$Te$_6$ has attracted considerable attention for its magnetic-field-induced insulator-metal transitions (IMTs) and unconventional current-driven phase transitions, yet the role of applied currents in the magnetic phase remains poorly understood. Here, by combining local magnetization probes and time-resolved transport measurements, we uncover an electrothermal origin for the current-induced first-order-like phase transitions, characterized by abrupt voltage jumps and distinct magnetic domain evolution. Current-voltage (I-V) characteristics measured under triangular waveforms exhibit strong non-reciprocal and hysteretic behaviors, which are significantly suppressed at frequencies ~1000 Hz. Time-resolved studies using rectangular pulsed currents demonstrate that the resistance dynamics closely mirror the equilibrium resistance-temperature profile, directly implicating Joule heating as the driving mechanism. Furthermore, we reveal that the intrinsic I-V response adheres to Ohm's law, displaying linearity across various magnetic fields and temperatures. Our work advocates for a cautious approach in distinguishing between genuine current-induced nonequilibrium quantum states and thermal effects. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.11048v1-abstract-full').style.display = 'none'; document.getElementById('2502.11048v1-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> 16 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </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">18 pages, four 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/2502.08074">arXiv:2502.08074</a> <span> [<a href="https://arxiv.org/pdf/2502.08074">pdf</a>, <a href="https://arxiv.org/ps/2502.08074">ps</a>, <a href="https://arxiv.org/format/2502.08074">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"> Phonon vibrational and transport properties of SnSe/SnS superlattice at finite temperatures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Xue%2C+F">Feng-ning Xue</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+W">Wei Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zi Li</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+Y">Yong 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="2502.08074v1-abstract-short" style="display: inline;"> The structural stability and phonon properties of SnSe/SnS superlattices at finite temperatures have been studied using machine learning force field molecular dynamics and the anharmonic phonon approach. The vertical SnSe/SnS superlattice undergoes a phase transition from the Pnma phase to a novel P4/nmm phase at finite temperatures, which is different from the high-temperature Cmcm phase of the S… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.08074v1-abstract-full').style.display = 'inline'; document.getElementById('2502.08074v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.08074v1-abstract-full" style="display: none;"> The structural stability and phonon properties of SnSe/SnS superlattices at finite temperatures have been studied using machine learning force field molecular dynamics and the anharmonic phonon approach. The vertical SnSe/SnS superlattice undergoes a phase transition from the Pnma phase to a novel P4/nmm phase at finite temperatures, which is different from the high-temperature Cmcm phase of the SnSe and SnS systems. The stability of P4/nmm phase is determined by molecular dynamics trajectories and anharmonic phonon dispersion relations. The imaginary modes of TO modes at the q=M(1/2,1/2,0) point of the P4/nmm phase in harmonic approximation become rigid at elevated temperatures. An analysis of phonon power spectra upon temperature also confirms the dynamic stabilization. The P4/nmm phase has higher symmetry than the Pnma phase, and the phase transition between them is accompanied by competition between the Jahn-Teller effect and phonon anharmonicity. Unlike the anisotropic distribution of Sn-Se/S bonds in the Pnma phase, the P4/nmm phase forms chemical bonds with similar bond lengths both in-plane and interlayer, and their resonance effect can significantly enhance phonon scattering. The calculated phonon density of states and lifetime is strongly temperature dependent, demonstrating the heavy anharmonicity in the SnSe/SnS system. The P4/nmm phase has an extremely low lattice thermal conductivity, close to the experimental values of SnSe and SnS. Moreover, with the reduction of band gap and the enhancement of band degeneracy near the Fermi level, the P4/nmm phase exhibits superior electronic transport properties and significantly enhanced response to infrared and visible light. This makes it show great potential in thermoelectric and photovoltaic applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.08074v1-abstract-full').style.display = 'none'; document.getElementById('2502.08074v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.07477">arXiv:2502.07477</a> <span> [<a href="https://arxiv.org/pdf/2502.07477">pdf</a>, <a href="https://arxiv.org/format/2502.07477">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> </div> </div> <p class="title is-5 mathjax"> Robust zero modes in PbTe-Pb hybrid nanowires </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+S">Shan Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+W">Wenyu Song</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zonglin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+Z">Zehao Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+R">Ruidong Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yuhao Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+Z">Zeyu Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+J">Jiaye Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Z">Zhaoyu Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+Y">Yichun Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+S">Shuai Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+L">Lining Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+X">Xiao Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+T">Tiantian Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Zang%2C+Y">Yunyi Zang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+L">Lin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Shang%2C+R">Runan Shang</a>, <a href="/search/cond-mat?searchtype=author&query=Xue%2C+Q">Qi-Kun Xue</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+K">Ke He</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+H">Hao Zhang</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="2502.07477v1-abstract-short" style="display: inline;"> Majorana zero modes in tunneling conductance are expected to manifest as robust zero bias peaks (ZBPs). While ZBPs alone are not conclusive evidence of Majorana modes due to alternative explanations, robust ZBPs remain a crucial and necessary first-step indicator in the search for topological states. Here, we report the observation of robust ZBPs in PbTe-Pb hybrid nanowires. The peak height can re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.07477v1-abstract-full').style.display = 'inline'; document.getElementById('2502.07477v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.07477v1-abstract-full" style="display: none;"> Majorana zero modes in tunneling conductance are expected to manifest as robust zero bias peaks (ZBPs). While ZBPs alone are not conclusive evidence of Majorana modes due to alternative explanations, robust ZBPs remain a crucial and necessary first-step indicator in the search for topological states. Here, we report the observation of robust ZBPs in PbTe-Pb hybrid nanowires. The peak height can reach $2e^2/h$, though it does not yet form a quantized plateau. Importantly, these ZBPs can remain non-split over sizable ranges in both magnetic field and gate voltage scans, highlighting their robustness. We discuss possible interpretations based on Majorana zero modes as well as Andreev bound states. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.07477v1-abstract-full').style.display = 'none'; document.getElementById('2502.07477v1-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.00103">arXiv:2502.00103</a> <span> [<a href="https://arxiv.org/pdf/2502.00103">pdf</a>, <a href="https://arxiv.org/format/2502.00103">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> <p class="title is-5 mathjax"> Theory of ab initio downfolding with arbitrary range electron-phonon coupling </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Tubman%2C+N+M">Norm M. Tubman</a>, <a href="/search/cond-mat?searchtype=author&query=Coveney%2C+C+J+N">Christopher J. N. Coveney</a>, <a href="/search/cond-mat?searchtype=author&query=Hsu%2C+C">Chih-En Hsu</a>, <a href="/search/cond-mat?searchtype=author&query=Montoya-Castillo%2C+A">Andres Montoya-Castillo</a>, <a href="/search/cond-mat?searchtype=author&query=Filip%2C+M+R">Marina R. Filip</a>, <a href="/search/cond-mat?searchtype=author&query=Neaton%2C+J+B">Jeffrey B. Neaton</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhenglu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Vlcek%2C+V">Vojtech Vlcek</a>, <a href="/search/cond-mat?searchtype=author&query=Alvertis%2C+A+M">Antonios M. Alvertis</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="2502.00103v1-abstract-short" style="display: inline;"> Ab initio downfolding describes the electronic structure of materials within a low-energy subspace, often around the Fermi level. Typically starting from mean-field calculations, this framework allows for the calculation of one- and two-electron interactions, and the parametrization of a many-body Hamiltonian representing the active space of interest. The subsequent solution of such Hamiltonians c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.00103v1-abstract-full').style.display = 'inline'; document.getElementById('2502.00103v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.00103v1-abstract-full" style="display: none;"> Ab initio downfolding describes the electronic structure of materials within a low-energy subspace, often around the Fermi level. Typically starting from mean-field calculations, this framework allows for the calculation of one- and two-electron interactions, and the parametrization of a many-body Hamiltonian representing the active space of interest. The subsequent solution of such Hamiltonians can provide insights into the physics of strongly-correlated materials. While phonons can substantially screen electron-electron interactions, electron-phonon coupling has been commonly ignored within ab initio downfolding, and when considered this is done only for short-range interactions. Here we propose a theory of ab initio downfolding that accounts for all mechanisms of electron-phonon coupling on equal footing, regardless of the range of the interactions. Our practical computational implementation is readily compatible with current downfolding approaches. We apply our approach to polar materials MgO and GeTe, and we reveal the importance of both short-range and long-range electron-phonon coupling in determining the magnitude of electron-electron interactions. Our results show that in the static limit, phonons reduce the on-site repulsion between electrons by 40% for MgO, and by 79% for GeTe. Our framework also predicts that overall attractive nearest-neighbor interactions arise between electrons in GeTe, consistent with superconductivity in this material. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.00103v1-abstract-full').style.display = 'none'; document.getElementById('2502.00103v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.17230">arXiv:2501.17230</a> <span> [<a href="https://arxiv.org/pdf/2501.17230">pdf</a>, <a href="https://arxiv.org/format/2501.17230">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</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="Strongly Correlated Electrons">cond-mat.str-el</span> </div> </div> <p class="title is-5 mathjax"> Phonon-mediated electron attraction in SrTiO$_3$ via the generalized Fr枚hlich and deformation potential mechanisms </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Tubman%2C+N+M">Norm M. Tubman</a>, <a href="/search/cond-mat?searchtype=author&query=Coveney%2C+C+J+N">Christopher J. N. Coveney</a>, <a href="/search/cond-mat?searchtype=author&query=Hsu%2C+C">Chih-En Hsu</a>, <a href="/search/cond-mat?searchtype=author&query=Montoya-Castillo%2C+A">Andres Montoya-Castillo</a>, <a href="/search/cond-mat?searchtype=author&query=Filip%2C+M+R">Marina R. Filip</a>, <a href="/search/cond-mat?searchtype=author&query=Neaton%2C+J+B">Jeffrey B. Neaton</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhenglu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Vlcek%2C+V">Vojtech Vlcek</a>, <a href="/search/cond-mat?searchtype=author&query=Alvertis%2C+A+M">Antonios M. Alvertis</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="2501.17230v2-abstract-short" style="display: inline;"> Superconductivity in doped SrTiO$_3$ was discovered in 1964, the first superconducting transition observed in a doped semiconductor. However, the mechanism behind electron pairing in SrTiO$_3$ remains a subject of debate. By developing a theoretical framework to incorporate dynamical lattice screening in the electronic Coulomb interactions of semiconductors and insulators, we demonstrate analytica… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.17230v2-abstract-full').style.display = 'inline'; document.getElementById('2501.17230v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.17230v2-abstract-full" style="display: none;"> Superconductivity in doped SrTiO$_3$ was discovered in 1964, the first superconducting transition observed in a doped semiconductor. However, the mechanism behind electron pairing in SrTiO$_3$ remains a subject of debate. By developing a theoretical framework to incorporate dynamical lattice screening in the electronic Coulomb interactions of semiconductors and insulators, we demonstrate analytically that long-range electron-phonon interactions described by a generalized multi-phonon Fr枚hlich mechanism result in phonon-mediated electron-electron attraction in SrTiO$_3$. Moreover, by combining our theory with first-principles calculations, we reveal an additional attractive interaction between electrons in SrTiO$_3$ due to the deformation potential mechanism, arising from the mixed ionic-covalent character of the Ti-O bond. Our results may have implications for the emergence of phonon-mediated electron attraction and superconductivity in a broader range of materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.17230v2-abstract-full').style.display = 'none'; document.getElementById('2501.17230v2-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, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.15424">arXiv:2501.15424</a> <span> [<a href="https://arxiv.org/pdf/2501.15424">pdf</a>, <a href="https://arxiv.org/ps/2501.15424">ps</a>, <a href="https://arxiv.org/format/2501.15424">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="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Giant Anomalous Hall Effect in Kagome Nodal Surface Semimetal Fe$_3$Ge </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+S">Shu-Xiang Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+W">Wencheng Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+S">Sheng Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+T">Tianhao Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zheng Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+J">Jinjin Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Mi%2C+J">Jun-Jian Mi</a>, <a href="/search/cond-mat?searchtype=author&query=Tao%2C+Q">Qian Tao</a>, <a href="/search/cond-mat?searchtype=author&query=Tang%2C+F">Feng Tang</a>, <a href="/search/cond-mat?searchtype=author&query=Wan%2C+X">Xiangang Wan</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+Z">Zhu-An Xu</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="2501.15424v1-abstract-short" style="display: inline;"> It is well known that the intrinsic anomalous Hall effect (AHE) arises from the integration of the non-zero Berry curvature (BC), conventionally observed in the Dirac/Weyl and nodal-line semimetals. Moreover, nodal surface semimetals are expected to exhibit more significant BC under the prevalence of degenerate points near the Fermi level. In this work, we report the detection of a giant AHE in th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.15424v1-abstract-full').style.display = 'inline'; document.getElementById('2501.15424v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.15424v1-abstract-full" style="display: none;"> It is well known that the intrinsic anomalous Hall effect (AHE) arises from the integration of the non-zero Berry curvature (BC), conventionally observed in the Dirac/Weyl and nodal-line semimetals. Moreover, nodal surface semimetals are expected to exhibit more significant BC under the prevalence of degenerate points near the Fermi level. In this work, we report the detection of a giant AHE in the Kagome magnet Fe$_3$Ge with a two-dimensional (2D) nodal surface (NS) at $k_{z}=蟺$ plane, exhibiting an anomalous Hall conductivity (AHC) of 1500 $惟^{-1}$cm$^{-1}$ at 160 K, the highest among all reported Kagome topological materials. This finding suggests a new platform for searching large AHC materials and facilitates potential room-temperature applications in spintronic devices and quantum computing. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.15424v1-abstract-full').style.display = 'none'; document.getElementById('2501.15424v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.13459">arXiv:2501.13459</a> <span> [<a href="https://arxiv.org/pdf/2501.13459">pdf</a>, <a href="https://arxiv.org/format/2501.13459">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> </div> </div> <p class="title is-5 mathjax"> Symmetry Breaking Dynamics in Quantum Many-Body Systems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yu%2C+H">Hui Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zi-Xiang Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+S">Shi-Xin Zhang</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="2501.13459v2-abstract-short" style="display: inline;"> Entanglement asymmetry has emerged as a powerful tool for characterizing symmetry breaking in quantum many-body systems. In this Letter, we explore how symmetry is dynamically broken through the lens of entanglement asymmetry in two distinct scenarios: a non-symmetric random quantum circuit and a non-symmetric Hamiltonian quench, with a particular focus on U(1) symmetry. In the former case, the sy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.13459v2-abstract-full').style.display = 'inline'; document.getElementById('2501.13459v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.13459v2-abstract-full" style="display: none;"> Entanglement asymmetry has emerged as a powerful tool for characterizing symmetry breaking in quantum many-body systems. In this Letter, we explore how symmetry is dynamically broken through the lens of entanglement asymmetry in two distinct scenarios: a non-symmetric random quantum circuit and a non-symmetric Hamiltonian quench, with a particular focus on U(1) symmetry. In the former case, the symmetry is initially broken and subsequently restored, whereas in the latter case, symmetry remains broken in the subsystem at late times, consistent with the principles of quantum thermalization. Notably, the growth of entanglement asymmetry exhibits unexpected overshooting behavior at early times in both contexts, contrasting with the behavior of charge variance. We also consider dynamics of non-symmetric initial states under the symmetry-breaking evolution. Due to the competition of symmetry-breaking in both the initial state and Hamiltonian, the early-time entanglement asymmetry can increase and decrease, while quantum Mpemba effects remain evident despite the weak symmetry-breaking in both settings. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.13459v2-abstract-full').style.display = 'none'; document.getElementById('2501.13459v2-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> 8 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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 with supplemental 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/2501.12029">arXiv:2501.12029</a> <span> [<a href="https://arxiv.org/pdf/2501.12029">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"> Nanoscale functionalization of MoS$_2$ monolayers with DNA origami </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+S">Shen Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhijie Li</a>, <a href="/search/cond-mat?searchtype=author&query=Meggyesi%2C+Z">Zs贸fia Meggyesi</a>, <a href="/search/cond-mat?searchtype=author&query=Erber%2C+E">Elisabeth Erber</a>, <a href="/search/cond-mat?searchtype=author&query=Sikeler%2C+C">Christoph Sikeler</a>, <a href="/search/cond-mat?searchtype=author&query=Watanabe%2C+K">Kenji Watanabe</a>, <a href="/search/cond-mat?searchtype=author&query=Taniguchi%2C+T">Takashi Taniguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Baimuratov%2C+A+S">Anvar S. Baimuratov</a>, <a href="/search/cond-mat?searchtype=author&query=Liedl%2C+T">Tim Liedl</a>, <a href="/search/cond-mat?searchtype=author&query=H%C3%B6gele%2C+A">Alexander H枚gele</a>, <a href="/search/cond-mat?searchtype=author&query=Martynenko%2C+I+V">Irina V. Martynenko</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="2501.12029v1-abstract-short" style="display: inline;"> The functionalization of two-dimensional (2D) materials with organic molecules is a promising approach for realizing nanoscale optoelectronic devices with tailored functionalities, such as quantum light generation and p-n junctions. However, achieving control over the molecules' precise positioning on the 2D material remains a significant challenge. Here, we overcome the limitations of solution- a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.12029v1-abstract-full').style.display = 'inline'; document.getElementById('2501.12029v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.12029v1-abstract-full" style="display: none;"> The functionalization of two-dimensional (2D) materials with organic molecules is a promising approach for realizing nanoscale optoelectronic devices with tailored functionalities, such as quantum light generation and p-n junctions. However, achieving control over the molecules' precise positioning on the 2D material remains a significant challenge. Here, we overcome the limitations of solution- and vapor deposition methods and use a DNA origami placement technique to spatially arrange various organic molecules on a chip surface at the single-molecule level with high assembly yields. This versatile method allows for precise patterning of transition metal dichalcogenides (TMDs) with organic molecules, including thiols and fluorescent dyes. We successfully integrated MoS$_2$ monolayers with micron-scale molecule-origami patterns achieving both single photon emission from thiol-induced localized excitons in MoS$_2$ and photoexcitation energy transfer with patterned fluorescent dyes. Our approach offers a pathway for producing complex, tailored 2D inorganic-organic heterostructures with molecular-level control, opening up new possibilities for advanced materials and device design. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.12029v1-abstract-full').style.display = 'none'; document.getElementById('2501.12029v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.11242">arXiv:2501.11242</a> <span> [<a href="https://arxiv.org/pdf/2501.11242">pdf</a>, <a href="https://arxiv.org/format/2501.11242">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="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> High-throughput calculations of two-dimensional auxetic $M_4X_8$ with magnetism, electrocatalysis, and alkali metal battery applications </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wang%2C+H">Haidi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+W">Wei Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+W">Weiduo Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Z">Zhao Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhongjun Li</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaofeng 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="2501.11242v1-abstract-short" style="display: inline;"> Two-dimensional (2D) materials with multifunctional properties, such as negative Poisson's ratio (NPR), magnetism, catalysis, and energy storage capabilities, are of significant interest for advanced applications in flexible electronics, spintronics, catalysis, and lithium-ion batteries. However, the discovery of such materials, particularly in low-dimensional forms, remains a challenge. In this s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.11242v1-abstract-full').style.display = 'inline'; document.getElementById('2501.11242v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.11242v1-abstract-full" style="display: none;"> Two-dimensional (2D) materials with multifunctional properties, such as negative Poisson's ratio (NPR), magnetism, catalysis, and energy storage capabilities, are of significant interest for advanced applications in flexible electronics, spintronics, catalysis, and lithium-ion batteries. However, the discovery of such materials, particularly in low-dimensional forms, remains a challenge. In this study, we perform high-throughput density-functional theory (DFT) calculations to explore a new class of 2D V-shaped monolayers with remarkable physicochemical properties. Among 18 stable $M_4X_8$ (M = transition metal; X = halogen) compounds, we identify 9 auxetic monolayers, with \ce{Pd4I8} standing out for its exceptionally high NPR of -0.798. Notably, 4 of these materials exhibit half semiconductor properties, while 5 others are bipolar magnetic semiconductors, offering a unique combination of electronic and magnetic behavior. Additionally, these materials demonstrate promising catalytic activity for hydrogen and oxygen evolution reactions (HER/OER) and show potential as anodes for rechargeable metal-ion batteries, particularly in alkali-ion systems. This work not only expands the family of 2D NPR materials but also introduces new candidates with multifunctional capabilities for a wide range of applications in nanoelectronics, catalysis, and energy storage. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.11242v1-abstract-full').style.display = 'none'; document.getElementById('2501.11242v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.08697">arXiv:2501.08697</a> <span> [<a href="https://arxiv.org/pdf/2501.08697">pdf</a>, <a href="https://arxiv.org/format/2501.08697">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> <p class="title is-5 mathjax"> ABACUS: An Electronic Structure Analysis Package for the AI Era </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+W">Weiqing Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zheng%2C+D">Daye Zheng</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Q">Qianrui Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+D">Denghui Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Y">Yu Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+P">Peize Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+Y">Yike Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Peng%2C+X">Xingliang Peng</a>, <a href="/search/cond-mat?searchtype=author&query=Bao%2C+J+J">Jie J. Bao</a>, <a href="/search/cond-mat?searchtype=author&query=Cai%2C+C">Chun Cai</a>, <a href="/search/cond-mat?searchtype=author&query=Jin%2C+Z">Zuxin Jin</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+J">Jing Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+H">Haochong Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Jin%2C+G">Gan Jin</a>, <a href="/search/cond-mat?searchtype=author&query=Ji%2C+Y">Yuyang Ji</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+Z">Zhenxiong Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaohui Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+L">Liang Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Cao%2C+Y">Yu Cao</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+M">Menglin Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+J">Jianchuan Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+T">Tao Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+R">Renxi Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Y">Yuanbo Li</a>, <a href="/search/cond-mat?searchtype=author&query=Han%2C+H">Haozhi Han</a> , et al. (28 additional authors not shown) </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="2501.08697v2-abstract-short" style="display: inline;"> ABACUS (Atomic-orbital Based Ab-initio Computation at USTC) is an open-source software for first-principles electronic structure calculations and molecular dynamics simulations. It mainly features density functional theory (DFT) and is compatible with both plane-wave basis sets and numerical atomic orbital basis sets. ABACUS serves as a platform that facilitates the integration of various electron… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08697v2-abstract-full').style.display = 'inline'; document.getElementById('2501.08697v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.08697v2-abstract-full" style="display: none;"> ABACUS (Atomic-orbital Based Ab-initio Computation at USTC) is an open-source software for first-principles electronic structure calculations and molecular dynamics simulations. It mainly features density functional theory (DFT) and is compatible with both plane-wave basis sets and numerical atomic orbital basis sets. ABACUS serves as a platform that facilitates the integration of various electronic structure methods, such as Kohn-Sham DFT, stochastic DFT, orbital-free DFT, and real-time time-dependent DFT, etc. In addition, with the aid of high-performance computing, ABACUS is designed to perform efficiently and provide massive amounts of first-principles data for generating general-purpose machine learning potentials, such as DPA models. Furthermore, ABACUS serves as an electronic structure platform that interfaces with several AI-assisted algorithms and packages, such as DeePKS-kit, DeePMD, DP-GEN, DeepH, DeePTB, etc. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08697v2-abstract-full').style.display = 'none'; document.getElementById('2501.08697v2-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.08687">arXiv:2501.08687</a> <span> [<a href="https://arxiv.org/pdf/2501.08687">pdf</a>, <a href="https://arxiv.org/format/2501.08687">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</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="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/10.1007/s11433-024-2596-6">10.1007/s11433-024-2596-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Preformed Cooper Pairs in a Triclinic Iron Pnictide Superconductor </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zezhong Li</a>, <a href="/search/cond-mat?searchtype=author&query=Hong%2C+W">Wenshan Hong</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+H">Honglin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Ma%2C+X">Xiaoyan Ma</a>, <a href="/search/cond-mat?searchtype=author&query=Stuhr%2C+U">Uwe Stuhr</a>, <a href="/search/cond-mat?searchtype=author&query=Zeng%2C+K">Kaiyue Zeng</a>, <a href="/search/cond-mat?searchtype=author&query=Ma%2C+L">Long Ma</a>, <a href="/search/cond-mat?searchtype=author&query=Xiang%2C+Y">Ying Xiang</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+H">Huan Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Wen%2C+H">Hai-Hu Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+J">Jiangping Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+S">Shiliang Li</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+H">Huiqian Luo</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="2501.08687v1-abstract-short" style="display: inline;"> Electron pairing along with phase coherence generates superconductivity below the critical temperature ($T_c$). In underdoped high-$T_c$ cuprates, these two quantum phenomena may occur at separate temperatures, which was lately confirmed in the quasi-two-dimensional (quasi-2D) iron chalcogenide superconductors. Here, we report a systematic investigation on the pre-pairing behavior in a triclinic i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08687v1-abstract-full').style.display = 'inline'; document.getElementById('2501.08687v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.08687v1-abstract-full" style="display: none;"> Electron pairing along with phase coherence generates superconductivity below the critical temperature ($T_c$). In underdoped high-$T_c$ cuprates, these two quantum phenomena may occur at separate temperatures, which was lately confirmed in the quasi-two-dimensional (quasi-2D) iron chalcogenide superconductors. Here, we report a systematic investigation on the pre-pairing behavior in a triclinic iron pnictide superconductor (Ca$_{0.85}$La$_{0.15}$)$_{10}$(Pt$_3$As$_8$)(Fe$_2$As$_2$)$_5$ with $T_c \approx $ 30 K, where the superconductivity is quasi-2D manifested by the Berezinskii-Kosterlitz-Thouless behaviors. Inelastic neutron scattering experiments unambiguously reveal a spin resonance peak around $E_R =$ 13 meV in the superconducting state, but its intensity continuously decreases when warming up across $T_c$, accompanied with an anomaly around $T^{*}\approx$ 45 K in spin correlations, and a suppression by an in-plane magnetic field persisting to the same temperature. Below $T^{*}$, a significant Nernst signal and a reduction of density of states at the Fermi level are also observed. These results suggest that the precursor of spin resonance is highly related to the preformed Cooper pairs driven by phase fluctuations, much like the pseudogap case in cuprates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08687v1-abstract-full').style.display = 'none'; document.getElementById('2501.08687v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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">12 pages, 8 figures, Accepted by SCIENCE CHINA Physics, Mechanics & Astronomy. https://doi.org/10.1007/s11433-024-2596-6</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> SCIENCE CHINA Physics, Mechanics & Astronomy, 68(4), 247415 (2025) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.08154">arXiv:2501.08154</a> <span> [<a href="https://arxiv.org/pdf/2501.08154">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</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"> Fabry-Perot resonance modes in a MoS$_2$-based vertical stacking cavity for strong light-matter coupling and topological phase singularity </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhonglin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yingying Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+X">Xianglin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhong%2C+B">Bo Zhong</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+W">Wenjun Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+Z">Zexiang Shen</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="2501.08154v1-abstract-short" style="display: inline;"> Rich dielectric properties in atomic transition metal dichalcogenides (TMDs) enhance light-matter interactions and contribute to a variety of optical phenomena. The direct transfer of TMDs onto photonic crystals facilitates optical field confinement and modifies photon dispersion through the generation of polaritons. However, light-matter interaction is severely limited by this stacking method. Th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08154v1-abstract-full').style.display = 'inline'; document.getElementById('2501.08154v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.08154v1-abstract-full" style="display: none;"> Rich dielectric properties in atomic transition metal dichalcogenides (TMDs) enhance light-matter interactions and contribute to a variety of optical phenomena. The direct transfer of TMDs onto photonic crystals facilitates optical field confinement and modifies photon dispersion through the generation of polaritons. However, light-matter interaction is severely limited by this stacking method. This limitation can be significantly improved by constructing a vertical stacking cavity with alternating layers of dielectric material and monolayer MoS$_2$. This multilayer structure is proven to be a compact, versatile, and customizable platform for controlling Fabry-Perot cavity resonance mode. Angle-resolved reflectance further aids in studying resonance mode dispersion. Moreover, the strong light-matter interaction results in multiple perfect absorptions, with the monolayer MoS$_2$ significantly contributing to the absorption in this system, as schematically revealed by the electric field distribution. The multiple perfect absorptions produce an unusual amounts of phase singularities with topological pairs, whose generation, evolution, and annihilation can be controlled by adjusting cavity parameters. Our findings provide a flexible and consistent framework for optimizing light-matter interactions and supporting further studies on wavefront shaping, optical vortices, and topological variants. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08154v1-abstract-full').style.display = 'none'; document.getElementById('2501.08154v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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, 5 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/2501.08123">arXiv:2501.08123</a> <span> [<a href="https://arxiv.org/pdf/2501.08123">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey 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="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Guiding polaritonic energy and momentum through two-dimensional Bravais lattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhonglin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yingying Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Bie%2C+R">Ruitong Bie</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+D">Dongliang Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+T">Tianze Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+W">Wenjun Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+L">Linfeng Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+Z">Zexiang Shen</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="2501.08123v1-abstract-short" style="display: inline;"> The strong exciton absorption in monolayer transition metal dichalcogenides provides a promising platform for studying polaritons with tunable dispersions, which are crucial for controlling polaritonic energy and momentum, but remain underexplored. In this work, monolayer MoS$_2$ is coupled with a Fabry-P茅rot microcavity to form polaritons. Five types of Bravais lattices with sub-wavelength period… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08123v1-abstract-full').style.display = 'inline'; document.getElementById('2501.08123v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.08123v1-abstract-full" style="display: none;"> The strong exciton absorption in monolayer transition metal dichalcogenides provides a promising platform for studying polaritons with tunable dispersions, which are crucial for controlling polaritonic energy and momentum, but remain underexplored. In this work, monolayer MoS$_2$ is coupled with a Fabry-P茅rot microcavity to form polaritons. Five types of Bravais lattices with sub-wavelength periods, based on polymethyl methacrylate (PMMA) nanopillars, are intentionally designed. The energy overlap between the periodic PMMA scattering wave and the polariton establishes a coupling channel that controls the directional flow of polaritonic energy, as demonstrated through angle-resolved reflectance measurements. Back-space image measurements further demonstrate that the dispersion in reciprocal space can be directly and manually tuned, allowing for control over their number and their positions. The coupling between the polariton and PMMA scattering wave is further demonstrated by analyzing the reflectance using the two-port two-mode model. The symmetries of 2D Bravais lattices allow the angle between energy and momentum flow to vary widely, from 90掳, 60掳, 45掳, and 30掳 to arbitrary values. By adjusting the lattice vector lengths, the position of the dispersion branch in a specific direction can be fine-tuned, enabling full-range control over polariton dispersion. This work presents the first theoretical and experimental demonstrations of guiding the direction of polaritonic energy and momentum through Bravais lattice design. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.08123v1-abstract-full').style.display = 'none'; document.getElementById('2501.08123v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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">24 pages, 5 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/2501.07866">arXiv:2501.07866</a> <span> [<a href="https://arxiv.org/pdf/2501.07866">pdf</a>, <a href="https://arxiv.org/format/2501.07866">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Multifractal-enriched mobility edges and emergent quantum phases in Rydberg atomic arrays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+S">Shan-Zhong Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Y">Yi-Cai Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yucheng Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+S">Shanchao Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+S">Shi-Liang Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhi Li</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="2501.07866v2-abstract-short" style="display: inline;"> Anderson localization describes disorder-induced phase transitions, distinguishing between localized and extended states. In quasiperiodic systems, a third multifractal state emerges, characterized by unique energy and wave functions. However, critical indicators for differentiating these states, such as Lyapunov exponents (LEs) and inverse participation ratios (IPRs), have yet to be experimentall… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.07866v2-abstract-full').style.display = 'inline'; document.getElementById('2501.07866v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.07866v2-abstract-full" style="display: none;"> Anderson localization describes disorder-induced phase transitions, distinguishing between localized and extended states. In quasiperiodic systems, a third multifractal state emerges, characterized by unique energy and wave functions. However, critical indicators for differentiating these states, such as Lyapunov exponents (LEs) and inverse participation ratios (IPRs), have yet to be experimentally detected. To address these challenges, we introduce exactly solvable one-dimensional quasiperiodic lattice models with flat bands, analytically determining phase boundaries using Avila's global theorem. We propose experimental realizations using Rydberg atom arrays, enabling the distinction of localized, extended, and multifractal states with as few as 18 qubits. Importantly, we develop a robust spectroscopic method for the experimental measurement of LEs and IPRs. Our work opens new avenues for the experimental exploration of Anderson localization and multifractal states in artificial quantum systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.07866v2-abstract-full').style.display = 'none'; document.getElementById('2501.07866v2-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 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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+22 pages, 4+16 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/2501.06568">arXiv:2501.06568</a> <span> [<a href="https://arxiv.org/pdf/2501.06568">pdf</a>, <a href="https://arxiv.org/ps/2501.06568">ps</a>, <a href="https://arxiv.org/format/2501.06568">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> </div> </div> <p class="title is-5 mathjax"> The Layer Hall Effect without External Electric Field </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Han%2C+Y">Yulei Han</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+Y">Yunpeng Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zeyu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Qiao%2C+Z">Zhenhua Qiao</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="2501.06568v1-abstract-short" style="display: inline;"> The layer Hall effect is an intriguing phenomenon observed in magnetic topological layered materials, where the Hall response arises from the opposite deflection of electrons on top and bottom layers. To realize layer Hall effect, space-time $\mathcal{PT}$ symmetry is typically broken by applying an external electric field. In this work, we propose a new mechanism to realize the layer Hall effect… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.06568v1-abstract-full').style.display = 'inline'; document.getElementById('2501.06568v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.06568v1-abstract-full" style="display: none;"> The layer Hall effect is an intriguing phenomenon observed in magnetic topological layered materials, where the Hall response arises from the opposite deflection of electrons on top and bottom layers. To realize layer Hall effect, space-time $\mathcal{PT}$ symmetry is typically broken by applying an external electric field. In this work, we propose a new mechanism to realize the layer Hall effect by introducing inequivalent exchange fields on both surfaces of a topological insulator thin film, in the absence of an electric field. This approach yields a distinct Hall response compared to the conventional electric-field-induced layer Hall effect, particularly with respect to the Fermi level. Taking the topological insulator Sb$_2$Te$_3$ as a concrete example, we demonstrate the feasibility of inducing the layer Hall effect only by coupling the top and bottom surfaces of Sb$_2$Te$_3$ with different magnetic insulators. Notably, we show that both built-in electric-field-induced and inequivalent exchange-fields-induced layer Hall effects can be achieved by tuning the stacking order between Sb$_2$Te$_3$ and the magnetic layers. Given the well-established experimental techniques for fabricating topological insulator thin films, our work offers a viable pathway for realizing layer Hall effect without external electric field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.06568v1-abstract-full').style.display = 'none'; document.getElementById('2501.06568v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.04569">arXiv:2501.04569</a> <span> [<a href="https://arxiv.org/pdf/2501.04569">pdf</a>, <a href="https://arxiv.org/format/2501.04569">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"> Designing Guidance for Multiple Valley-based Topological States Driven by Magnetic Substrates: Potential Applications at High Temperatures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hong%2C+X">Xiyu Hong</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhe Li</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="2501.04569v1-abstract-short" style="display: inline;"> Valley-based topological phases offer a wealth of exotic quantum states with tunable functionalities, driven by the valley degree of freedom. In this work, by constructing heterostructures of germanene (silicene, stanene) on various magnetic substrates, we address key tuning factors such as the spin-orbit coupling (SOC) strength of the substrate, magnetic orientations, and stacking orders, all of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.04569v1-abstract-full').style.display = 'inline'; document.getElementById('2501.04569v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.04569v1-abstract-full" style="display: none;"> Valley-based topological phases offer a wealth of exotic quantum states with tunable functionalities, driven by the valley degree of freedom. In this work, by constructing heterostructures of germanene (silicene, stanene) on various magnetic substrates, we address key tuning factors such as the spin-orbit coupling (SOC) strength of the substrate, magnetic orientations, and stacking orders, all of which govern multiple valley-based topological features. We present a comprehensive guiding principle for the efficient manipulation of these features, achieved simply by designing and modulating the magnetic properties of the underlying substrates. Specifically, increasing the SOC strength of the magnetic substrate acilitates a range of topological phase transitions characterized by different Chern numbers, with many systems exhibiting a transition from quantum valley Hall to quantum anomalous Hall (QAH) states. Additionally, rotating the in-plane magnetic orientation of the substrate enables tunability of the Chern number and chirality, within a moderate range of SOC strength. Furthermore, the antiferromagnetic coupling of the magnetic substrate can induce valley-based QAH states with substantial valley gaps, leveraging its high Curie temperature (TC) to enable the realization of multiple tunable magnetic topologies at elevated temperatures. Our findings provide a straightforward strategy for the design and manipulation of spintronic and valleytronic devices that can potentially operate under high-temperature conditions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.04569v1-abstract-full').style.display = 'none'; document.getElementById('2501.04569v1-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> 8 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.04345">arXiv:2501.04345</a> <span> [<a href="https://arxiv.org/pdf/2501.04345">pdf</a>, <a href="https://arxiv.org/format/2501.04345">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> </div> </div> <p class="title is-5 mathjax"> Anisotropy of PbTe nanowires with and without a superconductor </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zonglin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+W">Wenyu Song</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+S">Shan Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yuhao Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Z">Zhaoyu Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+Z">Zehao Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+R">Ruidong Li</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+Z">Zeyu Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+J">Jiaye Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+Y">Yichun Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+S">Shuai Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+L">Lining Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+X">Xiao Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+T">Tiantian Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Zang%2C+Y">Yunyi Zang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+L">Lin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Shang%2C+R">Runan Shang</a>, <a href="/search/cond-mat?searchtype=author&query=Xue%2C+Q">Qi-Kun Xue</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+K">Ke He</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+H">Hao Zhang</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="2501.04345v1-abstract-short" style="display: inline;"> We investigate the anisotropic behaviors in PbTe and PbTe-Pb hybrid nanowires. In previous studies on PbTe, wire-to-wire variations in anisotropy indicate poor device control, posing a serious challenge for applications. Here, we achieve reproducible anisotropy in PbTe nanowires through a substantial reduction of disorder. We then couple PbTe to a superconductor Pb, and observe a pronounced deviat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.04345v1-abstract-full').style.display = 'inline'; document.getElementById('2501.04345v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.04345v1-abstract-full" style="display: none;"> We investigate the anisotropic behaviors in PbTe and PbTe-Pb hybrid nanowires. In previous studies on PbTe, wire-to-wire variations in anisotropy indicate poor device control, posing a serious challenge for applications. Here, we achieve reproducible anisotropy in PbTe nanowires through a substantial reduction of disorder. We then couple PbTe to a superconductor Pb, and observe a pronounced deviation in the anisotropy behavior compared to bare PbTe nanowires. This deviation is gate-tunable and attributed to spin-orbit interaction and orbital effect, controlled by charge transfer between Pb and PbTe. These results provide a guidance for the controlled engineering of exotic quantum states in this hybrid material platform. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.04345v1-abstract-full').style.display = 'none'; document.getElementById('2501.04345v1-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> 8 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.02745">arXiv:2501.02745</a> <span> [<a href="https://arxiv.org/pdf/2501.02745">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> <span class="tag is-small is-grey 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="Computational Physics">physics.comp-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Generalized Huang's Equation for Phonon Polariton in Polyatomic Polar Crystal </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wang%2C+W">Weiliang Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+N">Ningsheng Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+Y">Yingyi Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhibing Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zheng%2C+Z">Zebo Zheng</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+H">Huanjun Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Deng%2C+S">Shaozhi Deng</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="2501.02745v1-abstract-short" style="display: inline;"> The original theory of phonon polariton is Huang's equation which is suitable for diatomic polar crystals only. We proposed a generalized Huang's equation without fitting parameters for phonon polariton in polyatomic polar crystals. We obtained the dispersions of phonon polariton in GaP (bulk), hBN (bulk and 2D), 伪-MoO3 (bulk and 2D) and ZnTeMoO6 (2D), which agree with the experimental results in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.02745v1-abstract-full').style.display = 'inline'; document.getElementById('2501.02745v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.02745v1-abstract-full" style="display: none;"> The original theory of phonon polariton is Huang's equation which is suitable for diatomic polar crystals only. We proposed a generalized Huang's equation without fitting parameters for phonon polariton in polyatomic polar crystals. We obtained the dispersions of phonon polariton in GaP (bulk), hBN (bulk and 2D), 伪-MoO3 (bulk and 2D) and ZnTeMoO6 (2D), which agree with the experimental results in the literature and of ourselves. We also obtained the eigenstates of the phonon polariton. We found that the circular polarization of the ion vibration component of these eigenstates is nonzero in hBN flakes. The result is different from that of the phonon in hBN. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.02745v1-abstract-full').style.display = 'none'; document.getElementById('2501.02745v1-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, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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, 10 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/2501.01852">arXiv:2501.01852</a> <span> [<a href="https://arxiv.org/pdf/2501.01852">pdf</a>, <a href="https://arxiv.org/format/2501.01852">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> </div> <p class="title is-5 mathjax"> The coherence peak of unconventional superconductors in the charge channel </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+P">Pengfei Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zheng Li</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+K">Kun Jiang</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="2501.01852v1-abstract-short" style="display: inline;"> In this work, we carry out a systematic investigation of the coherence peak in unconventional superconductors as they transition into the superconducting phase at $T_c$. Using $d$-wave cuprates as an example, we reveal the presence of a coherence peak below $T_c$ in the charge channel. The nuclear quadrupole relaxation rate is shown to be an effective method for detecting this unconventional coher… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.01852v1-abstract-full').style.display = 'inline'; document.getElementById('2501.01852v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.01852v1-abstract-full" style="display: none;"> In this work, we carry out a systematic investigation of the coherence peak in unconventional superconductors as they transition into the superconducting phase at $T_c$. Using $d$-wave cuprates as an example, we reveal the presence of a coherence peak below $T_c$ in the charge channel. The nuclear quadrupole relaxation rate is shown to be an effective method for detecting this unconventional coherence peak, with the superconducting coherence factor playing a pivotal role in its emergence. Additionally, we explore the influence of correlation effects, which further enhance this phenomenon. Extending our analysis, we demonstrate the existence of a similar coherence peak in ultrasonic attenuation and iron-based superconductors. Our findings offer a fresh perspective on probing superconducting gap symmetry in unconventional superconductors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.01852v1-abstract-full').style.display = 'none'; document.getElementById('2501.01852v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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, 3 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/2501.00996">arXiv:2501.00996</a> <span> [<a href="https://arxiv.org/pdf/2501.00996">pdf</a>, <a href="https://arxiv.org/format/2501.00996">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> <p class="title is-5 mathjax"> Kagome Metal GdNb$_6$Sn$_6$: A 4d Playground for Topological Magnetism and Electron Correlations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Xiao%2C+Y">Yusen Xiao</a>, <a href="/search/cond-mat?searchtype=author&query=Duan%2C+Q">Qingchen Duan</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhaoyi Li</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+S">Shu Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Tan%2C+H">Hengxin Tan</a>, <a href="/search/cond-mat?searchtype=author&query=Zhong%2C+R">Ruidan Zhong</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="2501.00996v1-abstract-short" style="display: inline;"> Magnetic kagome metals have garnered considerable attention as an ideal platform for investigating intrinsic topological structures, frustrated magnetism, and electron correlation effects. In this work, we present the synthesis and detailed characterization of GdNb$_6$Sn$_6$, a metal that features a niobium-based kagome lattice and a frustrated triangular gadolinium network. The compound adopts th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.00996v1-abstract-full').style.display = 'inline'; document.getElementById('2501.00996v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.00996v1-abstract-full" style="display: none;"> Magnetic kagome metals have garnered considerable attention as an ideal platform for investigating intrinsic topological structures, frustrated magnetism, and electron correlation effects. In this work, we present the synthesis and detailed characterization of GdNb$_6$Sn$_6$, a metal that features a niobium-based kagome lattice and a frustrated triangular gadolinium network. The compound adopts the HfFe$_6$Ge$_6$-type crystal structure, with lattice parameters of a = b = 5.765(4) 脜 and c = 9.536(8) 脜. Magnetic susceptibility and specific heat measurements reveal a magnetic transition near 2.3 K. Electrical transport data confirm metallic behavior, unsaturated positive magnetoresistance, and a hole-dominated multiband Hall effect. Furthermore, first-principles calculations indicate that Nb-4d orbitals predominantly contribute to the electronic states near the Fermi energy, with the band structure showing multiple topologically nontrivial crossings around the Fermi surface. This study also compares GdNb$_6$Sn$_6$ with GdV$_6$Sn$_6$, highlighting their similarities and differences. Our findings pave the way for exploring RNb$_6$Sn$_6$ (R = rare earth) with customized substitutions of R sites to fine-tune their properties. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.00996v1-abstract-full').style.display = 'none'; document.getElementById('2501.00996v1-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </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, 7 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/2501.00699">arXiv:2501.00699</a> <span> [<a href="https://arxiv.org/pdf/2501.00699">pdf</a>, <a href="https://arxiv.org/format/2501.00699">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</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/PhysRevX.14.041072">10.1103/PhysRevX.14.041072 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Unconventional Coherence Peak in Cuprate Superconductors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zheng Li</a>, <a href="/search/cond-mat?searchtype=author&query=Mu%2C+C">Chao Mu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+P">Pengfei Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+W">Wei Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+J">Jiangping Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Xiang%2C+T">Tao Xiang</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+K">Kun Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+J">Jianlin Luo</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="2501.00699v1-abstract-short" style="display: inline;"> The Hebel-Slichter coherence peak, observed in the spin-lattice relaxation rate $1/T_1$ just below the critical temperature $T_{\rm c}$, serves as a crucial experimental validation of the Bardeen-Cooper-Schrieffer pairing symmetry in conventional superconductors. However, no coherence peak in $1/T_1$ has been observed in unconventional superconductors like cuprates. In this study, an unconventiona… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.00699v1-abstract-full').style.display = 'inline'; document.getElementById('2501.00699v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.00699v1-abstract-full" style="display: none;"> The Hebel-Slichter coherence peak, observed in the spin-lattice relaxation rate $1/T_1$ just below the critical temperature $T_{\rm c}$, serves as a crucial experimental validation of the Bardeen-Cooper-Schrieffer pairing symmetry in conventional superconductors. However, no coherence peak in $1/T_1$ has been observed in unconventional superconductors like cuprates. In this study, an unconventional coherence peak is identified for the first time using nuclear quadrupole resonance on YBa$_2$Cu$_4$O$_8$, pointing to a distinctive pairing symmetry. The spin-lattice relaxation rate in nuclear quadrupole resonance and nuclear magnetic resonance with nuclear spin $I>1/2$ comprises the magnetic relaxation rate $1/T_{1}^{\rm mag}$, which probes magnetic fluctuations, and the quadrupole relaxation rate $1/T_{1}^{\rm quad}$, which probes charge fluctuations. By utilizing $^{63}$Cu and $^{65}$Cu isotopes, we successfully distinguish $1/T_{1}^{\rm mag}$ and $1/T_{1 }^{\rm quad}$ of YBa$_2$Cu$_4$O$_8$ and reveal the presence of the coherence peak in $1/T_{1 }^{\rm quad}$ but not in $1/T_{1}^{\rm mag}$, in contrast to conventional superconductors. Our finding demonstrates that unconventional superconductors do not exhibit a coherence peak in $1/T_{1}$ when the relaxation is due to fluctuations of the hyperfine field. Conversely, a coherence peak is expected when the relaxation is caused by electric field gradient fluctuations, due to the different coherence factors between charge and magnetic fluctuations. Our successful measurements of $1/T_{1}$ for the chains of YBa$_2$Cu$_4$O$_8$ suggest that, should the conditions for predominant quadrupole relaxation be satisfied, this phenomenon could provide a novel approach to exploring the unconventional nature of the pairing mechanism in other superconductors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.00699v1-abstract-full').style.display = 'none'; document.getElementById('2501.00699v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2025. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. X 14, 041072(2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.20136">arXiv:2412.20136</a> <span> [<a href="https://arxiv.org/pdf/2412.20136">pdf</a>, <a href="https://arxiv.org/ps/2412.20136">ps</a>, <a href="https://arxiv.org/format/2412.20136">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> <p class="title is-5 mathjax"> An ab-initio study on engineering quantum anomalous Hall effect in compensated antiferromagnet MnBi$_{2}$Te$_{4}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zeyu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Han%2C+Y">Yulei Han</a>, <a href="/search/cond-mat?searchtype=author&query=Qiao%2C+Z">Zhenhua Qiao</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="2412.20136v1-abstract-short" style="display: inline;"> Recently, the quantum anomalous Hall effect (QAHE) has been theoretically proposed in compensated antiferromagnetic systems by using the magnetic topological insulator model [see arXiv:2404.13305 (2024)]. However, the related and systematic study based on a realistic material system is still limited. As the only experimentally realized antiferromagnetic topological insulator, MnBi$_{2}$Te$_{4}$ be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.20136v1-abstract-full').style.display = 'inline'; document.getElementById('2412.20136v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.20136v1-abstract-full" style="display: none;"> Recently, the quantum anomalous Hall effect (QAHE) has been theoretically proposed in compensated antiferromagnetic systems by using the magnetic topological insulator model [see arXiv:2404.13305 (2024)]. However, the related and systematic study based on a realistic material system is still limited. As the only experimentally realized antiferromagnetic topological insulator, MnBi$_{2}$Te$_{4}$ becomes a vital platform for exploring various topological states. In this work, by using the comprehensive first-principles calculations, we demonstrate that the QAHE can also be realized in compensated antiferromagnetic even-septuple-layer MnBi$_{2}$Te$_{4}$ without combined parity-time ($\mathcal{PT}$) symmetry. Using a magnetic topological insulator model, the layer-resolved Chern number is calculated to further understand the physical origin of different Chern numbers. The application of external hydrostatic pressure can strengthen the Te-Te quasicovalent bond due to the dramatic compression of the van der Waals gap. Thus, the resulting topological nontrivial gap can exceed the room-temperature energy scale in a wide range of pressures. Additionally, we find that constructing MnBi$_{2}$Te$_{4}$/CrI$_{3}$ heterostructure can realize the compensated antiferromagnetic configurations with QAHE. Our findings illustrate the realization of QAHE in compensated antiferromagnetic even-septuple-layer MnBi$_{2}$Te$_{4}$ and provide a reliable strategy to obtain the corresponding magnetic configurations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.20136v1-abstract-full').style.display = 'none'; document.getElementById('2412.20136v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.20129">arXiv:2412.20129</a> <span> [<a href="https://arxiv.org/pdf/2412.20129">pdf</a>, <a href="https://arxiv.org/ps/2412.20129">ps</a>, <a href="https://arxiv.org/format/2412.20129">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> </div> </div> <p class="title is-5 mathjax"> Altermagnetism Induced Topological Phase Transitions in Kane-Mele Model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhengtian Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zeyu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Qiao%2C+Z">Zhenhua Qiao</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="2412.20129v1-abstract-short" style="display: inline;"> We theoretically demonstrate that Chern number tunable quantum anomalous Hall effect (QAHE) and second-order topological insulators can be induced in the two-dimensional $\mathbb{Z}_2$ topological insulator (TI), i.e., Kane-Mele model, by applying $d$-wave altermagnetism. When the N茅el vector of altermagentism lies in the $x-y$ plane, the $\mathbb{Z}_2$ TI is broken and driven into a second-order… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.20129v1-abstract-full').style.display = 'inline'; document.getElementById('2412.20129v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.20129v1-abstract-full" style="display: none;"> We theoretically demonstrate that Chern number tunable quantum anomalous Hall effect (QAHE) and second-order topological insulators can be induced in the two-dimensional $\mathbb{Z}_2$ topological insulator (TI), i.e., Kane-Mele model, by applying $d$-wave altermagnetism. When the N茅el vector of altermagentism lies in the $x-y$ plane, the $\mathbb{Z}_2$ TI is broken and driven into a second-order topological insulator phase, exhibiting the representative corner states at nanoflakes. When the intrinsic Rashba spin-orbit coupling is further included, the second-order TI is further driven into the QAHE phase with various Chern numbers (e.g., $\mathcal{C}=\pm1$ or $\pm3$). When the N茅el vector is along $z$ direction, the intrinsic Rashba spin-orbit coupling is necessary to break the mirror symmetry to allow a sequential emergence of second-order TI and QAHE along with the increase of altermagentism strength. We also observe the QAHE with mixed-chirality, i.e., there exist counter-propagating edge modes but net chiral current at the ribbon boundary. Our work shows that altermagnetism can play a crucial role in exploring a rich variety of topological phases, just like its counterparts of ferromagnetism and antiferromagnetism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.20129v1-abstract-full').style.display = 'none'; document.getElementById('2412.20129v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.18682">arXiv:2412.18682</a> <span> [<a href="https://arxiv.org/pdf/2412.18682">pdf</a>, <a href="https://arxiv.org/format/2412.18682">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="Computational Engineering, Finance, and Science">cs.CE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Computational Physics">physics.comp-ph</span> </div> </div> <p class="title is-5 mathjax"> Dissipation Dilution-Driven Topology Optimization for Maximizing the $Q$ Factor of Nanomechanical Resonators </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Algra%2C+H+J">Hendrik J. Algra</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zichao Li</a>, <a href="/search/cond-mat?searchtype=author&query=Langelaar%2C+M">Matthijs Langelaar</a>, <a href="/search/cond-mat?searchtype=author&query=Alijani%2C+F">Farbod Alijani</a>, <a href="/search/cond-mat?searchtype=author&query=Arag%C3%B3n%2C+A+M">Alejandro M. Arag贸n</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="2412.18682v1-abstract-short" style="display: inline;"> The quality factor ($Q$ factor) of nanomechanical resonators is influenced by geometry and stress, a phenomenon called dissipation dilution. Studies have explored maximizing this effect, leading to softly-clamped resonator designs. This paper proposes a topology optimization methodology to design two-dimensional nanomechanical resonators with high $Q$ factors by maximizing dissipation dilution. A… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.18682v1-abstract-full').style.display = 'inline'; document.getElementById('2412.18682v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.18682v1-abstract-full" style="display: none;"> The quality factor ($Q$ factor) of nanomechanical resonators is influenced by geometry and stress, a phenomenon called dissipation dilution. Studies have explored maximizing this effect, leading to softly-clamped resonator designs. This paper proposes a topology optimization methodology to design two-dimensional nanomechanical resonators with high $Q$ factors by maximizing dissipation dilution. A formulation based on the ratio of geometrically nonlinear to linear modal stiffnesses of a prestressed finite element model is used, with its corresponding adjoint sensitivity analysis formulation. Systematic design in square domains yields geometries with comparable $Q$ factors to literature. We analyze the trade-offs between resonance frequency and quality factor, and how these are reflected in the geometry of resonators. We further apply the methodology to optimize a resonator on a full hexagonal domain. By using the entire mesh -- i.e., without assuming any symmetries -- we find that the optimizer converges to a two-axis symmetric design comprised of four tethers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.18682v1-abstract-full').style.display = 'none'; document.getElementById('2412.18682v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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">23 pages, 13 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 74P15; 74S05 <span class="has-text-black-bis has-text-weight-semibold">ACM Class:</span> I.6.5; J.2 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.18481">arXiv:2412.18481</a> <span> [<a href="https://arxiv.org/pdf/2412.18481">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"> Linear Enhancement of Spin-Orbit Torques and Absence of Bulk Rashba-Type Spin Splitting in Perpendicularly Magnetized [Pt/Co/W]n Superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yan%2C+Z">Zhihao Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhengxiao Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+L">Lujun Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+X">Xin Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+L">Lijun Zhu</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="2412.18481v1-abstract-short" style="display: inline;"> The development of magnetic heterostructures with strong spin-orbit torques (SOTs), low impedance, strong perpendicular magnetic anisotropy (PMA), and good integration compatibility at the same time is central for high-performance spintronic memory and computing applications. Here, we report the development of the symmetry-broken spin-orbit superlattice [Pt/Co/W]n that can be sputtered-deposited o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.18481v1-abstract-full').style.display = 'inline'; document.getElementById('2412.18481v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.18481v1-abstract-full" style="display: none;"> The development of magnetic heterostructures with strong spin-orbit torques (SOTs), low impedance, strong perpendicular magnetic anisotropy (PMA), and good integration compatibility at the same time is central for high-performance spintronic memory and computing applications. Here, we report the development of the symmetry-broken spin-orbit superlattice [Pt/Co/W]n that can be sputtered-deposited on commercial oxidized silicon substrates and have giant SOTs, strong uniaxial PMA of 9.2 Merg/cm3. The dampinglike and fieldlike SOTs of the [Pt/Co/W]n superlattices exhibit a linear increase with the repeat number n and reach the giant values of 225% and -33% (two orders of magnitude greater than that in clean-limit Pt) at n = 12, respectively. The dampinglike SOT is also of the opposite sign and much greater in magnitude than the fieldlike SOT, regardless of the number of n. These results clarify that the spin current that generates SOTs in the [Pt/Co/W]n superlattices arises predominantly from the spin Hall effect rather than bulk Rashba-type spin splitting, providing a unified understanding of the SOTs in the superlattices. We also demonstrate deterministic switching in thicker-than-50-nm PMA [Pt/Co/W]12 superlattices at a low current density. This work establishes the [Pt/Co/W]n superlattice as a compelling material candidate for ultra-fast, low-power, long-retention nonvolatile spintronic memory and computing technologies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.18481v1-abstract-full').style.display = 'none'; document.getElementById('2412.18481v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.18414">arXiv:2412.18414</a> <span> [<a href="https://arxiv.org/pdf/2412.18414">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Machine Learning">cs.LG</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Discovery of 2D Materials via Symmetry-Constrained Diffusion Model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Xu%2C+S">Shihang Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Chu%2C+S">Shibing Chu</a>, <a href="/search/cond-mat?searchtype=author&query=Mrad%2C+R">Rami Mrad</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Z">Zhejun Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhelin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Jiao%2C+R">Runxian Jiao</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Y">Yuanping Chen</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="2412.18414v1-abstract-short" style="display: inline;"> Generative model for 2D materials has shown significant promise in accelerating the material discovery process. The stability and performance of these materials are strongly influenced by their underlying symmetry. However, existing generative models for 2D materials often neglect symmetry constraints, which limits both the diversity and quality of the generated structures. Here, we introduce a sy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.18414v1-abstract-full').style.display = 'inline'; document.getElementById('2412.18414v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.18414v1-abstract-full" style="display: none;"> Generative model for 2D materials has shown significant promise in accelerating the material discovery process. The stability and performance of these materials are strongly influenced by their underlying symmetry. However, existing generative models for 2D materials often neglect symmetry constraints, which limits both the diversity and quality of the generated structures. Here, we introduce a symmetry-constrained diffusion model (SCDM) that integrates space group symmetry into the generative process. By incorporating Wyckoff positions, the model ensures adherence to symmetry principles, leading to the generation of 2,000 candidate structures. DFT calculations were conducted to evaluate the convex hull energies of these structures after structural relaxation. From the generated samples, 843 materials that met the energy stability criteria (Ehull < 0.6 eV/atom) were identified. Among these, six candidates were selected for further stability analysis, including phonon band structure evaluations and electronic properties investigations, all of which exhibited phonon spectrum stability. To benchmark the performance of SCDM, a symmetry-unconstrained diffusion model was also evaluated via crystal structure prediction model. The results highlight that incorporating symmetry constraints enhances the effectiveness of generated 2D materials, making a contribution to the discovery of 2D materials through generative modeling. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.18414v1-abstract-full').style.display = 'none'; document.getElementById('2412.18414v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.17636">arXiv:2412.17636</a> <span> [<a href="https://arxiv.org/pdf/2412.17636">pdf</a>, <a href="https://arxiv.org/format/2412.17636">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Discovery of an anomalous non-evaporating sub-nanometre water layer in open environment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhijie Li</a>, <a href="/search/cond-mat?searchtype=author&query=Kong%2C+X">Xi Kong</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+H">Haoyu Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Qu%2C+G">Guanyu Qu</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+P">Pei Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Xie%2C+T">Tianyu Xie</a>, <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+Z">Zhiyuan Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Shi%2C+G">Guoshen Shi</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Ya Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Shi%2C+F">Fazhan Shi</a>, <a href="/search/cond-mat?searchtype=author&query=Du%2C+J">Jiangfeng Du</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="2412.17636v1-abstract-short" style="display: inline;"> Water exhibits complex behaviors as a result of hydrogen bonding, and low-dimensional confined water plays a key role in material science, geology, and biology science. Conventional techniques like STM, TEM, and AFM enable atomic-scale observations but face limitations under ambient conditions and surface topographies. NV center magnetic resonance technology provides an opportunity to overcome the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.17636v1-abstract-full').style.display = 'inline'; document.getElementById('2412.17636v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.17636v1-abstract-full" style="display: none;"> Water exhibits complex behaviors as a result of hydrogen bonding, and low-dimensional confined water plays a key role in material science, geology, and biology science. Conventional techniques like STM, TEM, and AFM enable atomic-scale observations but face limitations under ambient conditions and surface topographies. NV center magnetic resonance technology provides an opportunity to overcome these limitations, offering non-contact atomic-scale measurements with chemical resolution capability. In this study, a nanoscale layer dissection method was developed utilizing NV center technology to analyze water layers with diverse physicochemical properties. It unveiled the presence of a non-evaporating sub-nanometer water layer on a diamond surface under ambient conditions. This layer demonstrated impervious to atmospheric water vapor and exhibited unique electronic transport mediated via hydrogen bonding. These findings provide new perspectives and a platform for studying the structure and behavior of low-dimensional water, as well as the surface properties influenced by adsorbed water under native conditions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.17636v1-abstract-full').style.display = 'none'; document.getElementById('2412.17636v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.16439">arXiv:2412.16439</a> <span> [<a href="https://arxiv.org/pdf/2412.16439">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"> Excitonic effects on infrared vibrational and Raman spectroscopy from first principles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Chan%2C+Y">Yang-Hao Chan</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhenglu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Louie%2C+S+G">Steven G. Louie</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="2412.16439v1-abstract-short" style="display: inline;"> We develop a first-principles approach to compute infrared (IR) vibrational absorption and Raman scattering spectra with excitonic effects included. Our method is based on a perturbative expansion of electron-phonon and electron-light couplings in the time-dependent adiabatic GW (TD-aGW) theory. We show that excitonic effects in the IR absorption spectrum can be included by replacing the free elec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.16439v1-abstract-full').style.display = 'inline'; document.getElementById('2412.16439v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.16439v1-abstract-full" style="display: none;"> We develop a first-principles approach to compute infrared (IR) vibrational absorption and Raman scattering spectra with excitonic effects included. Our method is based on a perturbative expansion of electron-phonon and electron-light couplings in the time-dependent adiabatic GW (TD-aGW) theory. We show that excitonic effects in the IR absorption spectrum can be included by replacing the free electron-hole propagators in the perturbative expression for independent particles with their interacting counterparts, which are readily available from standard GW-Bethe-Salpeter equation calculations. For Raman spectrum, our derived expression agrees with the single and double resonance terms from a diagrammatic approach. We show significant excitonic enhancement in both the IR and resonance Raman scattering intensity for monolayer MoS2, WS2, and WSe2. Moreover, the exciton-phonon coupling strength and exciton energy landscape can be accessed by analyzing resonance Raman spectrum of these materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.16439v1-abstract-full').style.display = 'none'; document.getElementById('2412.16439v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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">17 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/2412.15719">arXiv:2412.15719</a> <span> [<a href="https://arxiv.org/pdf/2412.15719">pdf</a>, <a href="https://arxiv.org/ps/2412.15719">ps</a>, <a href="https://arxiv.org/format/2412.15719">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Gases">cond-mat.quant-gas</span> </div> </div> <p class="title is-5 mathjax"> Many-body interferometry of one-dimensional integrable systems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Arzamasovs%2C+M">Maksims Arzamasovs</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+M">Min Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Y">Yue Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Tian%2C+R">Rui Tian</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zehou Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+S">Shuai Li</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+B">Bo 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="2412.15719v1-abstract-short" style="display: inline;"> We propose using many-body Ramsey interferometry to measure non-equilibrium correlation functions of one-dimensional (1D) integrable systems. The 1D transverse-field Ising model, which is conjectured to equilibrate into non-thermal Gibbs ensemble (GGE) steady states, is studied. It is shown that retarded Green's functions, as opposed to ordinary spin-spin correlators considered previously, can con… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.15719v1-abstract-full').style.display = 'inline'; document.getElementById('2412.15719v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.15719v1-abstract-full" style="display: none;"> We propose using many-body Ramsey interferometry to measure non-equilibrium correlation functions of one-dimensional (1D) integrable systems. The 1D transverse-field Ising model, which is conjectured to equilibrate into non-thermal Gibbs ensemble (GGE) steady states, is studied. It is shown that retarded Green's functions, as opposed to ordinary spin-spin correlators considered previously, can convincingly distinguish between the GGE and thermal post-quench steady states, justifying the assumption of convergence towards the GGE as the system equilibrates. We also propose the experimental protocol for measuring the response functions with Ramsey interferometry, which can be used to distinguish between different post-quench phases of the model. Our proposal can be realized with current ultracold atom techniques, and opens up the possibility to study dynamics in non-thermal ensembles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.15719v1-abstract-full').style.display = 'none'; document.getElementById('2412.15719v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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 (+ Supplemental), 3 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/2412.13417">arXiv:2412.13417</a> <span> [<a href="https://arxiv.org/pdf/2412.13417">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Geophysics">physics.geo-ph</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"> Hugoniot equation of state and sound velocity of CaSiO3 glass under shock compression </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wu%2C+Y">Ye Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Q">Qing Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yishi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+Y">Yu Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zehui Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zining Li</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+C">Chang Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xun Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+H">Haijun Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Fei%2C+Y">Yingwei Fei</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="2412.13417v1-abstract-short" style="display: inline;"> Davemaoite, as the third most abundant mineral in the lower mantle, constitutes significant amounts in pyrolite and mid-ocean ridge basalts. Due to its unquenchable nature, measurements by static compression techniques on physical properties of davemaoite at lower mantle conditions are rare and technically challenging, and those are essential to constrain compositions and properties of mineralogic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.13417v1-abstract-full').style.display = 'inline'; document.getElementById('2412.13417v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.13417v1-abstract-full" style="display: none;"> Davemaoite, as the third most abundant mineral in the lower mantle, constitutes significant amounts in pyrolite and mid-ocean ridge basalts. Due to its unquenchable nature, measurements by static compression techniques on physical properties of davemaoite at lower mantle conditions are rare and technically challenging, and those are essential to constrain compositions and properties of mineralogical models in the lower mantle. Here, we present Hugoniot equation of state and sound velocity of CaSiO3 glass under shock compression. The CaSiO3 glass transforms into the crystalline phase above 34 GPa and completely transforms into davemaoite above 120 GPa. Thermal equation of state and Hugoniot temperature of davemaoite have been derived from the shock wave data. The CaSiO3 glass under shcok compression has very high shock temperature. Shock wave experiments for sound velocity of CaSiO3 glass indicate that no melting is observed at Hugoniot pressure up to 117.6 GPa. We propose that the melting temperature of davemaoite should be higher than those reported theoretically by now. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.13417v1-abstract-full').style.display = 'none'; document.getElementById('2412.13417v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.12630">arXiv:2412.12630</a> <span> [<a href="https://arxiv.org/pdf/2412.12630">pdf</a>, <a href="https://arxiv.org/format/2412.12630">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> </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.110.235402">10.1103/PhysRevB.110.235402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Local optical conductivity of strain solitons in bilayer graphene with arbitrary soliton angle </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wen%2C+L">Lu Wen</a>, <a href="/search/cond-mat?searchtype=author&query=Lv%2C+X">Xinyu Lv</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhiqiang Li</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="2412.12630v1-abstract-short" style="display: inline;"> We theoretically study the electronic band structure and local optical conductivity of domain wall solitons in bilayer graphene (as well as twisted bilayer graphene) with arbitrary soliton angle, which characterizes the local strain direction. We demonstrate that the soliton angle provides an important yet underexplored degree of freedom that can strongly modify the local optical conductivity. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.12630v1-abstract-full').style.display = 'inline'; document.getElementById('2412.12630v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.12630v1-abstract-full" style="display: none;"> We theoretically study the electronic band structure and local optical conductivity of domain wall solitons in bilayer graphene (as well as twisted bilayer graphene) with arbitrary soliton angle, which characterizes the local strain direction. We demonstrate that the soliton angle provides an important yet underexplored degree of freedom that can strongly modify the local optical conductivity. The conductivity spectrum features resonance peaks associated with interband transitions involving the topological as well as high-energy soliton states. Two most prominent peaks exhibit continuous suppression and enhancement, respectively, with the soliton angle. The dependence of the peaks on Fermi energy provides important information about the soliton band structure. The local optical conductivity exhibits substantial spatial dependence, which can be used to study the spatial distribution of the soliton states. Furthermore, we show that the conductivity spectra for all soliton angles are broadly tunable by external pressure, which can double the energies of the resonance peaks in experimentally achievable pressure ranges. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.12630v1-abstract-full').style.display = 'none'; document.getElementById('2412.12630v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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">11 pages, 6 figures, published to Physical Review B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review B 110, 235402 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.09985">arXiv:2412.09985</a> <span> [<a href="https://arxiv.org/pdf/2412.09985">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> <p class="title is-5 mathjax"> Switchable Chern insulator, isospin competitions and charge density waves in rhombohedral graphene moire superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zheng%2C+J">Jian Zheng</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+S">Size Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+K">Kai Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Lyu%2C+B">Bosai Lyu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+S">Shuhan Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Sha%2C+Y">Yating Sha</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhengxian Li</a>, <a href="/search/cond-mat?searchtype=author&query=Watanabe%2C+K">Kenji Watanabe</a>, <a href="/search/cond-mat?searchtype=author&query=Taniguchi%2C+T">Takashi Taniguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Jia%2C+J">Jinfeng Jia</a>, <a href="/search/cond-mat?searchtype=author&query=Shi%2C+Z">Zhiwen Shi</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+G">Guorui Chen</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="2412.09985v1-abstract-short" style="display: inline;"> Graphene-based moire superlattices provide a versatile platform for exploring novel correlated and topological electronic states, driven by enhanced Coulomb interactions within flat bands. The intrinsic tunability of graphene s multiple degrees of freedom enables precise control over these complex quantum phases. In this study, we observe a range of competing phases and their transitions in rhombo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.09985v1-abstract-full').style.display = 'inline'; document.getElementById('2412.09985v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.09985v1-abstract-full" style="display: none;"> Graphene-based moire superlattices provide a versatile platform for exploring novel correlated and topological electronic states, driven by enhanced Coulomb interactions within flat bands. The intrinsic tunability of graphene s multiple degrees of freedom enables precise control over these complex quantum phases. In this study, we observe a range of competing phases and their transitions in rhombohedrally stacked hexalayer graphene on hexagonal boron nitride (r-6G/hBN) moire superlattices. When electrons are polarized away from the moire superlattice, we firstly identify a Chern insulator with reversible Chern numbers at v = 1 (one electron per moire cell), attributed to the competition between bulk and edge magnetizations.Then, we detect transitions between three distinct insulating states at v = 2, driven by vertical displacement field D and vertical magnetic field B. These insulating phases are distinguished as spin-antiferromagnetic, spin-polarized, and valley-polarized insulators, based on their responses to parallel and perpendicular magnetic fields. When electrons are polarized toward the moire superlattice, in a device with large twist angle, insulating states appear at v = 1/3 and 2/3 at zero magnetic field, and v = 1/2 in a magnetic field. Our findings reveal a rich interplay of charge, isospin, topology and magnetic field in rhombohedral graphene moire superlattices. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.09985v1-abstract-full').style.display = 'none'; document.getElementById('2412.09985v1-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> 13 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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">24 pages, 10 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/2412.08994">arXiv:2412.08994</a> <span> [<a href="https://arxiv.org/pdf/2412.08994">pdf</a>, <a href="https://arxiv.org/format/2412.08994">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> </div> <p class="title is-5 mathjax"> $渭$SR study on noncentrosymmetric superconductor NbGe$_{\mathbf{2}}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Jiao%2C+J+C">J. C. Jiao</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+K+W">K. W. Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Hillier%2C+A+D">A. D. Hillier</a>, <a href="/search/cond-mat?searchtype=author&query=Ito%2C+T+U">T. U. Ito</a>, <a href="/search/cond-mat?searchtype=author&query=Higemoto%2C+W">W. Higemoto</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Z. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Lv%2C+B+J">B. J. Lv</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+Z+-">Z. -A. Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Shu%2C+L">L. Shu</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="2412.08994v1-abstract-short" style="display: inline;"> We report a muon spin relaxation ($渭$SR) study on polycrystalline noncentrosymmetric superconductor NbGe$_2$~with the superconducting transition temperature $T_c=2.0\sim2.1$~K. Zero-field $渭$SR~experiment indicates the absence of spontaneous magnetic field in the superconducting state, showing the preservation of time-reversal symmetry in the superconducting state. Transverse-field $渭$SR~experimen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.08994v1-abstract-full').style.display = 'inline'; document.getElementById('2412.08994v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.08994v1-abstract-full" style="display: none;"> We report a muon spin relaxation ($渭$SR) study on polycrystalline noncentrosymmetric superconductor NbGe$_2$~with the superconducting transition temperature $T_c=2.0\sim2.1$~K. Zero-field $渭$SR~experiment indicates the absence of spontaneous magnetic field in the superconducting state, showing the preservation of time-reversal symmetry in the superconducting state. Transverse-field $渭$SR~experiment is performed to map the phase diagram of NbGe$_2$, from which clear evidence of both type-I and type-II superconductivity is obtained. More importantly, we clearly delineate the region in the phase diagram where type-I and type-II superconductivity coexist. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.08994v1-abstract-full').style.display = 'none'; document.getElementById('2412.08994v1-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> 12 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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 Physical. Rev. B</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.08067">arXiv:2412.08067</a> <span> [<a href="https://arxiv.org/pdf/2412.08067">pdf</a>, <a href="https://arxiv.org/format/2412.08067">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="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Emergent topological re-entrant phase transition in a generalized quasiperiodic modulated Su-Schrieffer-Heeger model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wang%2C+X">Xiao-Ming Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+S">Shan-Zhong Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhi Li</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="2412.08067v1-abstract-short" style="display: inline;"> We study the topological properties of the one-dimensional generalized quasiperiodic modulated Su-Schrieffer-Heeger model. The results reveal that topological re-entrant phase transition emerges. Through the analysis of a real-space winding number , we divide the emergent topological re-entrant phase transitions into two types. The first is the re-entrant phase transition from the traditional topo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.08067v1-abstract-full').style.display = 'inline'; document.getElementById('2412.08067v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.08067v1-abstract-full" style="display: none;"> We study the topological properties of the one-dimensional generalized quasiperiodic modulated Su-Schrieffer-Heeger model. The results reveal that topological re-entrant phase transition emerges. Through the analysis of a real-space winding number , we divide the emergent topological re-entrant phase transitions into two types. The first is the re-entrant phase transition from the traditional topological insulator phase into the topological Anderson insulator phase, and the second is the re-entrant phenomenon from one topological Anderson insulator phase into another topological Anderson insulator phase. These two types of re-entrant phase transition correspond to bounded and unbounded cases of quasiperiodic modulation, respectively. Furthermore, we verify the above topological re-entrant phase transitions by analyzing the Lyapunov exponent and bulk gap. Since Su-Schrieffer-Heeger models have been realized in various artificial systems (such as cold atoms, optical waveguide arrays, ion traps, Rydberg atom arrays, etc.), the two types of topological re-entrant phase transition predicted in this paper are expected to be realized in the near future. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.08067v1-abstract-full').style.display = 'none'; document.getElementById('2412.08067v1-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> 10 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.06476">arXiv:2412.06476</a> <span> [<a href="https://arxiv.org/pdf/2412.06476">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> </div> </div> <p class="title is-5 mathjax"> Real-space study of zero-field correlation in tetralayer rhombohedral graphene </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Y">Yufeng Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zonglin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+S">Shudan Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+M">Min Li</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+Y">Yu Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+K">Kai Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+Q">Qia Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+L">Liang Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">Xiaoxue Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Guan%2C+D">Dandan Guan</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Y">Yaoyi Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zheng%2C+H">Hao Zheng</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+C">Canhua Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Watanabe%2C+K">Kenji Watanabe</a>, <a href="/search/cond-mat?searchtype=author&query=Taniguchi%2C+T">Takashi Taniguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Jia%2C+J">Jinfeng Jia</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+T">Tingxin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+G">Guorui Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+J">Jianpeng Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+C">Can Li</a>, <a href="/search/cond-mat?searchtype=author&query=Shi%2C+Z">Zhiwen Shi</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+S">Shiyong 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="2412.06476v1-abstract-short" style="display: inline;"> Rhombohedral graphene (RG) has emerged as a promising platform for exploring exotic quantum phenomena, such as quantum magnetism, unconventional superconductivity, and fractional quantum anomalous Hall effects. Despite its potential, atomic-scale investigations of RG remain limited, hindering a detailed microscopic understanding of the origins of these correlated states. In this study, we employ s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.06476v1-abstract-full').style.display = 'inline'; document.getElementById('2412.06476v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.06476v1-abstract-full" style="display: none;"> Rhombohedral graphene (RG) has emerged as a promising platform for exploring exotic quantum phenomena, such as quantum magnetism, unconventional superconductivity, and fractional quantum anomalous Hall effects. Despite its potential, atomic-scale investigations of RG remain limited, hindering a detailed microscopic understanding of the origins of these correlated states. In this study, we employ scanning probe microscopy and spectroscopy to probe the intrinsic electronic states in trilayer and tetralayer RG. We identify a correlated insulating state with a 17 meV gap at the charge neutrality point in tetralayer RG, which is absent in the trilayer configuration. This gap is suppressed by applying a perpendicular magnetic field or doping the charge carrier density and does not exhibit inter-valley coherence patterns. We attribute this phenomenon to a symmetry-broken layer antiferromagnetic state, characterized by ferrimagnetic ordering in the outermost layers and antiferromagnetic coupling between them. To further investigate this magnetic correlated state, we conduct local scattering experiments. Within the correlated regime, a bound state emerges around a non-magnetic impurity but is absent near magnetic impurities, suggesting that non-magnetic doping induces a spin texture in the ferrimagnetic surface layers. Outside the correlated regime, Friedel oscillations are observed, allowing precise determination of the band dispersion in tetralayer RG. These findings provide atomic-scale evidences of zero-field correlations in RG and may be extended to study other exotic phases in RG. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.06476v1-abstract-full').style.display = 'none'; document.getElementById('2412.06476v1-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> 9 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.04702">arXiv:2412.04702</a> <span> [<a href="https://arxiv.org/pdf/2412.04702">pdf</a>, <a href="https://arxiv.org/format/2412.04702">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="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Infinite Grassmann time-evolving matrix product operators for non-equilibrium quantum impurity problems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sun%2C+Z">Zhijie Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+R">Ruofan Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhenyu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+C">Chu Guo</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="2412.04702v1-abstract-short" style="display: inline;"> An emergent numerical approach to solve quantum impurity problems is to encode the impurity path integral as a matrix product state. For time-dependent problems, the cost of this approach generally scales with the evolution time. Here we consider a common non-equilibrium scenario where an impurity, initially in equilibrium with a thermal bath, is driven out of equilibrium by a time-dependent force… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.04702v1-abstract-full').style.display = 'inline'; document.getElementById('2412.04702v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.04702v1-abstract-full" style="display: none;"> An emergent numerical approach to solve quantum impurity problems is to encode the impurity path integral as a matrix product state. For time-dependent problems, the cost of this approach generally scales with the evolution time. Here we consider a common non-equilibrium scenario where an impurity, initially in equilibrium with a thermal bath, is driven out of equilibrium by a time-dependent force term. Despite that there is no time-translational invariance in the problem, we show that we could still make full use of the infinite matrix product state technique, resulting in a method whose cost is essentially independent of the evolution time. We demonstrate the effectiveness of this method in the integrable case against exact diagonalization, and against existing calculations on the L-shaped Kadanoff-Baym contour in the general case. Our method could be a very competitive method for studying long-time non-equilibrium quantum dynamics, and be potentially used as an efficient impurity solver in the non-equilibrium dynamical mean field theory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.04702v1-abstract-full').style.display = 'none'; document.getElementById('2412.04702v1-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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, 8 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/2412.02516">arXiv:2412.02516</a> <span> [<a href="https://arxiv.org/pdf/2412.02516">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</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"> Ultrafast Superradiant Scintillation from Weakly Confined CsPbBr3 Nanocrystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zaffalon%2C+M+L">Matteo L. Zaffalon</a>, <a href="/search/cond-mat?searchtype=author&query=Fratelli%2C+A">Andrea Fratelli</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhanzhao Li</a>, <a href="/search/cond-mat?searchtype=author&query=Bruni%2C+F">Francesco Bruni</a>, <a href="/search/cond-mat?searchtype=author&query=Cherniukh%2C+I">Ihor Cherniukh</a>, <a href="/search/cond-mat?searchtype=author&query=Carulli%2C+F">Francesco Carulli</a>, <a href="/search/cond-mat?searchtype=author&query=Meinardi%2C+F">Francesco Meinardi</a>, <a href="/search/cond-mat?searchtype=author&query=Kovalenko%2C+M+V">Maksym V. Kovalenko</a>, <a href="/search/cond-mat?searchtype=author&query=Manna%2C+L">Liberato Manna</a>, <a href="/search/cond-mat?searchtype=author&query=Brovelli%2C+S">Sergio Brovelli</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="2412.02516v2-abstract-short" style="display: inline;"> Efficiency and emission rate are two traditionally conflicting parameters in radiation detection, and achieving their simultaneous maximization could significantly advance ultrafast time-of-flight (ToF) technologies. In this study, we demonstrate that this goal is attainable by harnessing the giant oscillator strength (GOS) inherent to weakly confined perovskite nanocrystals, which enables superra… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.02516v2-abstract-full').style.display = 'inline'; document.getElementById('2412.02516v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.02516v2-abstract-full" style="display: none;"> Efficiency and emission rate are two traditionally conflicting parameters in radiation detection, and achieving their simultaneous maximization could significantly advance ultrafast time-of-flight (ToF) technologies. In this study, we demonstrate that this goal is attainable by harnessing the giant oscillator strength (GOS) inherent to weakly confined perovskite nanocrystals, which enables superradiant scintillation under mildly cryogenic conditions that align seamlessly with ToF technologies. We show that the radiative acceleration due to GOS encompasses both single and multiple exciton dynamics arising from ionizing interactions, further enhanced by suppressed non-radiative losses and Auger recombination at 80 K. The outcome is ultrafast scintillation with 420 ps lifetime and light yield of ~10'000 photons/MeV for diluted NC solutions, all without non-radiative losses. Temperature-dependent light-guiding experiments on test-bed nanocomposite scintillators finally indicate that the light-transport capability remains unaffected by the accumulation of band-edge oscillator strength due to GOS. These findings suggest a promising pathway toward developing ultrafast nanotech scintillators with optimized light output and timing performance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.02516v2-abstract-full').style.display = 'none'; document.getElementById('2412.02516v2-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 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.02157">arXiv:2412.02157</a> <span> [<a href="https://arxiv.org/pdf/2412.02157">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Sublayers Editing of Covalent MAX Phase for Nanolaminated Early Transition Metal Compounds </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Ziqian Li</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+K">Ke Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+X">Xudong Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+K">Kan Luo</a>, <a href="/search/cond-mat?searchtype=author&query=Lei%2C+L">Lei Lei</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+M">Mian Li</a>, <a href="/search/cond-mat?searchtype=author&query=Liang%2C+K">Kun Liang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+D">Degao Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Du%2C+S">Shiyu Du</a>, <a href="/search/cond-mat?searchtype=author&query=Chai%2C+Z">Zhifang Chai</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+Q">Qing Huang</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="2412.02157v1-abstract-short" style="display: inline;"> Two-dimensional transition metal carbides and nitrides (MXenes) have gained popularity in fields such as energy storage, catalysis, and electromagnetic interference due to their diverse elemental compositions and variable surface terminations (T). Generally, the synthesis of MXene materials involves etching the weak M-A metallic bonds in the ternary layered transition metal carbides and nitrides (… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.02157v1-abstract-full').style.display = 'inline'; document.getElementById('2412.02157v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.02157v1-abstract-full" style="display: none;"> Two-dimensional transition metal carbides and nitrides (MXenes) have gained popularity in fields such as energy storage, catalysis, and electromagnetic interference due to their diverse elemental compositions and variable surface terminations (T). Generally, the synthesis of MXene materials involves etching the weak M-A metallic bonds in the ternary layered transition metal carbides and nitrides (MAX phase) using HF acid or Lewis acid molten salts, while the strong M-X covalent bonds preserve the two-dimensional framework structure of MXenes. On the other hand, the MAX phase material family also includes a significant class of members where the A site is occupied by non-metal main group elements (such as sulfur and phosphorus), in which both M-A and M-X are covalent bond-type sublayers. The aforementioned etching methods cannot be used to synthesize MXene materials from these parent phases. In this work, we discovered that the covalent bond-type M-A and M-X sublayers exhibit different reactivity with some inorganic materials in a high-temperature molten state. By utilizing this difference in reactivity, we can structurally modify these covalent sublayers, allowing for the substitution of elements at the X site (from B to Se, S, P, C) and converting non-metal A site atoms in non-van der Waals (non-vdW) MAX phases into surface atoms in vdW layered materials. This results in a family of early transition metal Xide chalcogenides (TMXCs) that exhibit lattice characteristics of both MXenes and transition metal chalcogenides. Using electron-donor chemical scissors, these TMXC layered materials can be further exfoliated into monolayer nanosheets. The atomic configurations of each atom in these monolayer TMXCs are the same as those of conventional MXenes, but the oxidation states of the M-site atoms can be regulated by both X-site atoms and intercalated cations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.02157v1-abstract-full').style.display = 'none'; document.getElementById('2412.02157v1-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> 2 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.01518">arXiv:2412.01518</a> <span> [<a href="https://arxiv.org/pdf/2412.01518">pdf</a>, <a href="https://arxiv.org/format/2412.01518">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> <p class="title is-5 mathjax"> Magnetic-Transition-Induced Colossal Magnetoresistance in the Ferrimagnetic Semiconductor Mn$_3$Si$_2$Te$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Y">Yiyue Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">ZeYu Li</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+K">Kunya Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Wei%2C+L">Linlin Wei</a>, <a href="/search/cond-mat?searchtype=author&query=Mi%2C+X">Xinrun Mi</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+A">Aifeng Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+X">Xiaoyuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+X">Xiaolong Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Chai%2C+Y">Yisheng Chai</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+M">Mingquan 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="2412.01518v1-abstract-short" style="display: inline;"> In the ferrimagnetic semiconductor Mn$_3$Si$_2$Te$_6$, a colossal magnetoresistance (CMR) is observed only when a magnetic field is applied along the magnetic hard axis ($\mathbf{H}\parallel c$). This phenomenon suggests an unconventional CMR mechanism potentially driven by the interplay between magnetism, topological band structure, and/or chiral orbital currents (COC). By comparing electrical re… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.01518v1-abstract-full').style.display = 'inline'; document.getElementById('2412.01518v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.01518v1-abstract-full" style="display: none;"> In the ferrimagnetic semiconductor Mn$_3$Si$_2$Te$_6$, a colossal magnetoresistance (CMR) is observed only when a magnetic field is applied along the magnetic hard axis ($\mathbf{H}\parallel c$). This phenomenon suggests an unconventional CMR mechanism potentially driven by the interplay between magnetism, topological band structure, and/or chiral orbital currents (COC). By comparing electrical resistance measurements using continuous direct currents and pulse currents, we found that the current-induced insulator-metal transition, supporting the COC-driven CMR mechanism, is likely a consequence of Joule heating effects. Additionally, multiple magnetic field-induced metamagnetic transitions were identified through AC magnetostriction coefficient experiments, but only when $\mathbf{H}\parallel c$. Importantly, the transition at $\sim$ 5 T marks the boundary between the low-field CMR and high-field weak MR. These findings suggest that field-induced metamagnetic transition combined with partial polarization of magnetic moments are the primary causes of the band gap closure, leading to the observed CMR in Mn$_3$Si$_2$Te$_6$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.01518v1-abstract-full').style.display = 'none'; document.getElementById('2412.01518v1-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> 2 December, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2024. </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> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2411.19566">arXiv:2411.19566</a> <span> [<a href="https://arxiv.org/pdf/2411.19566">pdf</a>, <a href="https://arxiv.org/format/2411.19566">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> </div> </div> <p class="title is-5 mathjax"> Current-driven motion of magnetic domain-wall skyrmions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Nie%2C+H">Haoyang Nie</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhixiong Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+X">Xiansi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Z">Zhenyu 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="2411.19566v1-abstract-short" style="display: inline;"> Domain-wall skyrmions (DWSKs) are topological spin textures confined within domain walls that have recently attracted significant attention due to their potential applications in racetrack memory technologies. In this study, we theoretically investigated the motion of DWSKs driven by spin-polarized currents in ferromagnetic strips. Our findings reveal that the motion of DWSKs is contingent upon th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.19566v1-abstract-full').style.display = 'inline'; document.getElementById('2411.19566v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.19566v1-abstract-full" style="display: none;"> Domain-wall skyrmions (DWSKs) are topological spin textures confined within domain walls that have recently attracted significant attention due to their potential applications in racetrack memory technologies. In this study, we theoretically investigated the motion of DWSKs driven by spin-polarized currents in ferromagnetic strips. Our findings reveal that the motion of DWSKs is contingent upon the direction of the current. When the current is applied parallel to the domain wall, both spin-transfer torque (STT) and spin-orbit torque (SOT) can drive the DWSK along the domain wall. Conversely, for currents applied perpendicular to the domain wall, STT can induce DWSK motion by leveraging the skyrmion Hall effect as a driving force, whereas SOT-driven DWSKs halt their motion after sliding along the domain wall. Furthermore, we demonstrated the current-driven motion of DWSKs along curved domain walls and proposed a racetrack memory architecture utilizing DWSKs. These findings advance the understanding of DWSK dynamics and provide insights for the design of spintronic devices based on DWSKs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.19566v1-abstract-full').style.display = 'none'; document.getElementById('2411.19566v1-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2024. </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 and 5 figures</span> </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=Li%2C+Z&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=100" class="pagination-link " aria-label="Page 3" aria-current="page">3 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=150" class="pagination-link " aria-label="Page 4" aria-current="page">4 </a> </li> <li> <a href="/search/?searchtype=author&query=Li%2C+Z&start=200" class="pagination-link " aria-label="Page 5" aria-current="page">5 </a> </li> <li><span class="pagination-ellipsis">…</span></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