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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> <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/2311.09609">arXiv:2311.09609</a> <span> [<a href="https://arxiv.org/pdf/2311.09609">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/sciadv.adn8694">10.1126/sciadv.adn8694 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Suppression of Antiferromagnetic Order by Strain in Honeycomb Cobaltate: Implication for Quantum Spin Liquid </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kim%2C+G">Gye-Hyeon Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+M">Miju Park</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+U">Uksam Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Kang%2C+B">Baekjune Kang</a>, <a href="/search/cond-mat?searchtype=author&query=Seo%2C+U">Uihyeon Seo</a>, <a href="/search/cond-mat?searchtype=author&query=Ji%2C+G">GwangCheol Ji</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+S">Seunghyeon Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Cho%2C+D">Deok-Yong Cho</a>, <a href="/search/cond-mat?searchtype=author&query=Yoo%2C+J">Jung-Woo Yoo</a>, <a href="/search/cond-mat?searchtype=author&query=Ok%2C+J+M">Jong Mok Ok</a>, <a href="/search/cond-mat?searchtype=author&query=Sohn%2C+C">Changhee Sohn</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="2311.09609v2-abstract-short" style="display: inline;"> Recently, layered honeycomb cobaltates have been predicted as a new promising system for realizing the Kitaev quantum spin liquid, a many-body quantum entangled ground state characterized by fractional excitations. However, these cobaltates, similar to other candidate materials, exhibit classical antiferromagnetic ordering at low temperatures, which impedes the formation of the expected quantum st… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.09609v2-abstract-full').style.display = 'inline'; document.getElementById('2311.09609v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.09609v2-abstract-full" style="display: none;"> Recently, layered honeycomb cobaltates have been predicted as a new promising system for realizing the Kitaev quantum spin liquid, a many-body quantum entangled ground state characterized by fractional excitations. However, these cobaltates, similar to other candidate materials, exhibit classical antiferromagnetic ordering at low temperatures, which impedes the formation of the expected quantum state. Here, we demonstrate that the control of the trigonal crystal field of Co ions is crucial to suppress classical antiferromagnetic ordering and to locate its ground state in closer vicinity to quantum spin liquid in layered honeycomb cobaltates. By utilizing heterostructure engineering on Cu3Co2SbO6 thin films, we adjust the trigonal distortion of CoO6 octahedra and the associated trigonal crystal field. The original N茅el temperature of 16 K in bulk Cu3Co2SbO6 decreases (increases) to 7.8 K (22.7 K) in strained Cu3Co2SbO6 films by decreasing (increasing) the magnitude of the trigonal crystal fields. Our experimental finding substantiates the potential of layered honeycomb cobaltate heterostructures and strain engineering to accomplish the extremely elusive quantum phase of matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.09609v2-abstract-full').style.display = 'none'; document.getElementById('2311.09609v2-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.15753">arXiv:2309.15753</a> <span> [<a href="https://arxiv.org/pdf/2309.15753">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"> Optical detection of bond-dependent and frustrated spin in the two-dimensional cobalt-based honeycomb antiferromagnet Cu3Co2SbO6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kang%2C+B">Baekjune Kang</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+U">Uksam Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Jung%2C+T+S">Taek Sun Jung</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+S">Seunghyeon Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+G">Gye-Hyeon Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Seo%2C+U">UiHyeon Seo</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+M">Miju Park</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jin-Hyun Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+M">Minjae Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Ji%2C+G">GwangCheol Ji</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+S">Sehwan Song</a>, <a href="/search/cond-mat?searchtype=author&query=Jo%2C+H">Hyesung Jo</a>, <a href="/search/cond-mat?searchtype=author&query=Hong%2C+S">Seokjo Hong</a>, <a href="/search/cond-mat?searchtype=author&query=Duong%2C+N+X">Nguyen Xuan Duong</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T+H">Tae Heon Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+Y">Yongsoo Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+S">Sungkyun Park</a>, <a href="/search/cond-mat?searchtype=author&query=Ok%2C+J+M">Jong Mok Ok</a>, <a href="/search/cond-mat?searchtype=author&query=Yoo%2C+J">Jung-Woo Yoo</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+J+H">Jae Hoon Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Sohn%2C+C">Changhee Sohn</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="2309.15753v1-abstract-short" style="display: inline;"> Two-dimensional honeycomb antiferromagnet becomes an important class of materials as it can provide a route to Kitaev quantum spin liquid, characterized by massive quantum entanglement and fractional excitations. The signatures of its proximity to Kitaev quantum spin liquid in the honeycomb antiferromagnet includes anisotropic bond-dependent magnetic responses and persistent fluctuation by frustra… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.15753v1-abstract-full').style.display = 'inline'; document.getElementById('2309.15753v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.15753v1-abstract-full" style="display: none;"> Two-dimensional honeycomb antiferromagnet becomes an important class of materials as it can provide a route to Kitaev quantum spin liquid, characterized by massive quantum entanglement and fractional excitations. The signatures of its proximity to Kitaev quantum spin liquid in the honeycomb antiferromagnet includes anisotropic bond-dependent magnetic responses and persistent fluctuation by frustration in paramagnetic regime. Here, we propose Cu3Co2SbO6 heterostructures as an intriguing honeycomb antiferromagnet for quantum spin liquid, wherein bond-dependent and frustrated spins interact with optical excitons. This system exhibits antiferromagnetism at 16 K with different spin-flip magnetic fields between a bond-parallel and bond-perpendicular directions, aligning more closely with the generalized Heisenberg-Kitaev than the XXZ model. Optical spectroscopy reveals a strong excitonic transition coupled to the antiferromagnetism, enabling optical detection of its spin states. Particularly, such spin-exciton coupling presents anisotropic responses between bond-parallel and bond-perpendicular magnetic field as well as a finite spin-spin correlation function around 40 K, higher than twice its N茅el temperature. The characteristic temperature that remains barely changed even under strong magnetic fields highlights the robustness of the spin-fluctuation region. Our results demonstrate Cu3Co2SbO6 as a unique candidate for the quantum spin liquid phase, where the spin Hamiltonian and quasiparticle excitations can be probed and potentially controlled by light. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.15753v1-abstract-full').style.display = 'none'; document.getElementById('2309.15753v1-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> 27 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.05376">arXiv:2211.05376</a> <span> [<a href="https://arxiv.org/pdf/2211.05376">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.107.075103">10.1103/PhysRevB.107.075103 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Honeycomb oxide heterostructure: a new platform for Kitaev quantum spin liquid </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kang%2C+B">Baekjune Kang</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+M">Miju Park</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+S">Sehwan Song</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+S">Seunghyun Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Choe%2C+D">Daeseong Choe</a>, <a href="/search/cond-mat?searchtype=author&query=Kong%2C+M">Minsik Kong</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+M">Minjae Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Seo%2C+C">Choongwon Seo</a>, <a href="/search/cond-mat?searchtype=author&query=Ko%2C+E+K">Eun Kyo Ko</a>, <a href="/search/cond-mat?searchtype=author&query=Yi%2C+G">Gangsan Yi</a>, <a href="/search/cond-mat?searchtype=author&query=Yoo%2C+J">Jung-woo Yoo</a>, <a href="/search/cond-mat?searchtype=author&query=Park%2C+S">Sungkyun Park</a>, <a href="/search/cond-mat?searchtype=author&query=Ok%2C+J+M">Jong Mok Ok</a>, <a href="/search/cond-mat?searchtype=author&query=Sohn%2C+C">Changhee Sohn</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="2211.05376v3-abstract-short" style="display: inline;"> Kitaev quantum spin liquid, massively quantum entangled states, is so scarce in nature that searching for new candidate systems remains a great challenge. Honeycomb heterostructure could be a promising route to realize and utilize such an exotic quantum phase by providing additional controllability of Hamiltonian and device compatibility, respectively. Here, we provide epitaxial honeycomb oxide th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.05376v3-abstract-full').style.display = 'inline'; document.getElementById('2211.05376v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.05376v3-abstract-full" style="display: none;"> Kitaev quantum spin liquid, massively quantum entangled states, is so scarce in nature that searching for new candidate systems remains a great challenge. Honeycomb heterostructure could be a promising route to realize and utilize such an exotic quantum phase by providing additional controllability of Hamiltonian and device compatibility, respectively. Here, we provide epitaxial honeycomb oxide thin film Na3Co2SbO6, a candidate of Kitaev quantum spin liquid proposed recently. We found a spin glass and antiferromagnetic ground states depending on Na stoichiometry, signifying not only the importance of Na vacancy control but also strong frustration in Na3Co2SbO6. Despite its classical ground state, the field-dependent magnetic susceptibility shows remarkable scaling collapse with a single critical exponent, which can be interpreted as evidence of quantum criticality. Its electronic ground state and derived spin Hamiltonian from spectroscopies are consistent with the predicted Kitaev model. Our work provides a unique route to the realization and utilization of Kitaev quantum spin liquid. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.05376v3-abstract-full').style.display = 'none'; document.getElementById('2211.05376v3-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1709.00281">arXiv:1709.00281</a> <span> [<a href="https://arxiv.org/pdf/1709.00281">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.nanolett.6b02978">10.1021/acs.nanolett.6b02978 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantitative measurements of size-dependent magnetoelectric coupling in Fe3O4 nanoparticles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yoo%2C+K">Kyongjun Yoo</a>, <a href="/search/cond-mat?searchtype=author&query=Jeon%2C+B">Byung-Gu Jeon</a>, <a href="/search/cond-mat?searchtype=author&query=Chun%2C+S+H">Sae Hwan Chun</a>, <a href="/search/cond-mat?searchtype=author&query=Patil%2C+D+R">Deepak Rajaram Patil</a>, <a href="/search/cond-mat?searchtype=author&query=Lim%2C+Y">Yong-jun Lim</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+S">Seung-hyun Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Gil%2C+J">Jihyo Gil</a>, <a href="/search/cond-mat?searchtype=author&query=Cheon%2C+J">Jinwoo Cheon</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+K+H">Kee Hoon Kim</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1709.00281v1-abstract-short" style="display: inline;"> Bulk magnetite (Fe3O4), the loadstone used in magnetic compasses, has been known to exhibit magnetoelectric (ME) properties below ~10 K; however, corresponding ME effects in Fe3O4 nanoparticles have been enigmatic. We investigate quantitatively the ME coupling of spherical Fe3O4 nanoparticles with uniform diameters (d) from 3 to 15 nm embedded in an insulating host, using a sensitive ME susceptome… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.00281v1-abstract-full').style.display = 'inline'; document.getElementById('1709.00281v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.00281v1-abstract-full" style="display: none;"> Bulk magnetite (Fe3O4), the loadstone used in magnetic compasses, has been known to exhibit magnetoelectric (ME) properties below ~10 K; however, corresponding ME effects in Fe3O4 nanoparticles have been enigmatic. We investigate quantitatively the ME coupling of spherical Fe3O4 nanoparticles with uniform diameters (d) from 3 to 15 nm embedded in an insulating host, using a sensitive ME susceptometer. The intrinsic ME susceptibility (MES) of the Fe3O4 nanoparticles is measured, exhibiting a maximum value of ~0.6 ps/m at 5 K for d=15 nm. We found that the MES is reduced with reduced d but remains finite until d=~5 nm, which is close to the critical thickness for observing the Verwey transition. Moreover, with reduced diameter, the critical temperature below which the MES becomes conspicuous increased systematically from 9.8 K in the bulk to 19.7 K in the nanoparticles with d=7 nm, reflecting the core-shell effect on the ME properties. These results point to a new pathway for investigating ME effect in various nanomaterials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.00281v1-abstract-full').style.display = 'none'; document.getElementById('1709.00281v1-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 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nano Letters 16, 12 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.0452">arXiv:1405.0452</a> <span> [<a href="https://arxiv.org/pdf/1405.0452">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/1.4896225">10.1063/1.4896225 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin-orbit torque-driven magnetization switching and thermal effects studied in Ta\CoFeB\MgO nanowires </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Conte%2C+R+L">R. Lo Conte</a>, <a href="/search/cond-mat?searchtype=author&query=Hrabec%2C+A">A. Hrabec</a>, <a href="/search/cond-mat?searchtype=author&query=Mihai%2C+A+P">A. P. Mihai</a>, <a href="/search/cond-mat?searchtype=author&query=Schulz%2C+T">T. Schulz</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+S+-">S. -J. Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Marrows%2C+C+H">C. H. Marrows</a>, <a href="/search/cond-mat?searchtype=author&query=Moore%2C+T+A">T. A. Moore</a>, <a href="/search/cond-mat?searchtype=author&query=Kl%C3%A4ui%2C+M">M. Kl盲ui</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="1405.0452v1-abstract-short" style="display: inline;"> We demonstrate magnetization switching in out-of-plane magnetized Ta\CoFeB\MgO nanowires by current pulse injection along the nanowires, both with and without a constant and uniform magnetic field collinear to the current direction. We deduce that an effective torque arising from spin-orbit effects in the multilayer drives the switching mechanism. While the generation of a component of the magneti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.0452v1-abstract-full').style.display = 'inline'; document.getElementById('1405.0452v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.0452v1-abstract-full" style="display: none;"> We demonstrate magnetization switching in out-of-plane magnetized Ta\CoFeB\MgO nanowires by current pulse injection along the nanowires, both with and without a constant and uniform magnetic field collinear to the current direction. We deduce that an effective torque arising from spin-orbit effects in the multilayer drives the switching mechanism. While the generation of a component of the magnetization along the current direction is crucial for the switching to occur, we observe that even without a longitudinal field thermally generated magnetization fluctuations can lead to switching. Analysis using a generalized N茅el-Brown model enables key parameters of the thermally induced spin-orbit torques switching process to be estimated, such as the attempt frequency and the effective energy barrier. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.0452v1-abstract-full').style.display = 'none'; document.getElementById('1405.0452v1-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 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 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/1202.6464">arXiv:1202.6464</a> <span> [<a href="https://arxiv.org/pdf/1202.6464">pdf</a>, <a href="https://arxiv.org/ps/1202.6464">ps</a>, <a href="https://arxiv.org/format/1202.6464">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"> Spin wave modes in magnetic nanodisks under in-plane magnetic field </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kaneko%2C+T">T. Kaneko</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+S+M">S. M. Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Miyake%2C+K">K. Miyake</a>, <a href="/search/cond-mat?searchtype=author&query=Sahashi%2C+M">M. Sahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Imamura%2C+H">H. Imamura</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="1202.6464v1-abstract-short" style="display: inline;"> The size dependence of spin wave modes in a circular Permalloy (Py) nanodisk under an in-plane magnetic field is systematically studied by using micromagnetics simulations. We show that as the disk diameter is increased, the resonance frequency of the backward mode deceases while that of the uniform mode increases. The avoided crossing of resonance frequencies of the uniform mode and the backward… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.6464v1-abstract-full').style.display = 'inline'; document.getElementById('1202.6464v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1202.6464v1-abstract-full" style="display: none;"> The size dependence of spin wave modes in a circular Permalloy (Py) nanodisk under an in-plane magnetic field is systematically studied by using micromagnetics simulations. We show that as the disk diameter is increased, the resonance frequency of the backward mode deceases while that of the uniform mode increases. The avoided crossing of resonance frequencies of the uniform mode and the backward mode appears in the plot of the size dependence of resonance frequencies and the backward mode turns into the so-called "edge mode" for large nanodisks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1202.6464v1-abstract-full').style.display = 'none'; document.getElementById('1202.6464v1-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 February, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2012. </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">3 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/cond-mat/0007282">arXiv:cond-mat/0007282</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0007282">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0007282">ps</a>, <a href="https://arxiv.org/format/cond-mat/0007282">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.62.045503">10.1103/PhysRevC.62.045503 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A variational perturbation scheme for many-particle systems in the functional integral approach </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=You%2C+S+K">Sang Koo You</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+C+K">Chul Koo Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Nahm%2C+K">Kyun Nahm</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+H+S">Hyun Sik Noh</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="cond-mat/0007282v1-abstract-short" style="display: inline;"> A variational Perturbation theory based on the functional integral approach is formulated for many-particle systems. Using the variational action obtained through Jensen-Peierls' inequality, a perturbative expansion scheme for the thermodynamic potential is established. A modified Wick's theorem is obtained for the variational perturbation expansions. This theorem allows one to carry out systema… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0007282v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0007282v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0007282v1-abstract-full" style="display: none;"> A variational Perturbation theory based on the functional integral approach is formulated for many-particle systems. Using the variational action obtained through Jensen-Peierls' inequality, a perturbative expansion scheme for the thermodynamic potential is established. A modified Wick's theorem is obtained for the variational perturbation expansions. This theorem allows one to carry out systematic calculations of higher order terms without worrying about the double counting problem. A model numerical calculation was carried out on a nucleon gas system interacting through the Yukawa-type potential to test the efficiency of the present method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0007282v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0007282v1-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 July, 2000; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2000. </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 for publication in Phys. Rev. C</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/9808233">arXiv:cond-mat/9808233</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/9808233">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/9808233">ps</a>, <a href="https://arxiv.org/format/cond-mat/9808233">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> </div> </div> <p class="title is-5 mathjax"> Fluctuation correction to the ground state energy density of a dilute Bose gas in the functional Schr枚dinger picture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kim%2C+S">Sang-Hoon Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+H+S">Hyun Sik Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+D+K">Dae Kwan Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+C+K">Chul Koo Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Nahm%2C+K">Kyun Nahm</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="cond-mat/9808233v1-abstract-short" style="display: inline;"> A dilute Bose gas system is studied using the functional Schr枚dinger picture theory. The ground state properties are obtained by solving the infinite dimensional Schr枚dinger equation variationally. It is shown that a shifted Gaussian trial wavefunctional enables us to calculate a higher order correction, which corresponds to the fluctuation contribution from the condensate. The obtained term is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/9808233v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/9808233v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/9808233v1-abstract-full" style="display: none;"> A dilute Bose gas system is studied using the functional Schr枚dinger picture theory. The ground state properties are obtained by solving the infinite dimensional Schr枚dinger equation variationally. It is shown that a shifted Gaussian trial wavefunctional enables us to calculate a higher order correction, which corresponds to the fluctuation contribution from the condensate. The obtained term is compared with the quantum correction arising from the low energy $3 \to 3$ scattering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/9808233v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/9808233v1-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 August, 1998; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 1998. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/9703101">arXiv:cond-mat/9703101</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/9703101">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/9703101">ps</a>, <a href="https://arxiv.org/format/cond-mat/9703101">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"> Finite temperature many-particle theory of condensed matter systems in the functional Schroedinger picture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Noh%2C+H+S">Hyun Sik Noh</a>, <a href="/search/cond-mat?searchtype=author&query=You%2C+S+K">Sang Koo You</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+C+K">Chul Koo Kim</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="cond-mat/9703101v1-abstract-short" style="display: inline;"> A finite temperature many-particle theory of condensed matter systems is formulated using the functional Schroedinger picture. Using the interacting electron gas as a model system, we solve the equation of motion for the density matrix variationally with a Gaussian type trial density matrix. We show that the present formalism yields the finite temperature Hartree-Fock results both for the para-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/9703101v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/9703101v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/9703101v1-abstract-full" style="display: none;"> A finite temperature many-particle theory of condensed matter systems is formulated using the functional Schroedinger picture. Using the interacting electron gas as a model system, we solve the equation of motion for the density matrix variationally with a Gaussian type trial density matrix. We show that the present formalism yields the finite temperature Hartree-Fock results both for the para- and ferromagnetic states in a simple and convenient fashion. Implications of the present results and future prospects are also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/9703101v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/9703101v1-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 March, 1997; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 1997. </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">12pages, to appear in Int. J. Mod. Phys. B</span> </p> </li> </ol> <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>

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