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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/2502.10809">arXiv:2502.10809</a> <span> [<a href="https://arxiv.org/pdf/2502.10809">pdf</a>, <a href="https://arxiv.org/ps/2502.10809">ps</a>, <a href="https://arxiv.org/format/2502.10809">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"> Circular Dichroism in Resonant Inelastic X-ray Scattering: Probing Altermagnetic Domains in MnTe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Takegami%2C+D">D. Takegami</a>, <a href="/search/cond-mat?searchtype=author&query=Aoyama%2C+T">T. Aoyama</a>, <a href="/search/cond-mat?searchtype=author&query=Okauchi%2C+T">T. Okauchi</a>, <a href="/search/cond-mat?searchtype=author&query=Yamaguchi%2C+T">T. Yamaguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Tippireddy%2C+S">S. Tippireddy</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Garc%C3%ADa-Fern%C3%A1ndez%2C+M">M. Garc铆a-Fern谩ndez</a>, <a href="/search/cond-mat?searchtype=author&query=Mizokawa%2C+T">T. Mizokawa</a>, <a href="/search/cond-mat?searchtype=author&query=Ohgushi%2C+K">K. Ohgushi</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Chaloupka%2C+J">J. Chaloupka</a>, <a href="/search/cond-mat?searchtype=author&query=Kune%C5%A1%2C+J">J. Kune拧</a>, <a href="/search/cond-mat?searchtype=author&query=Hariki%2C+A">A. Hariki</a>, <a href="/search/cond-mat?searchtype=author&query=Suzuki%2C+H">H. Suzuki</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2502.10809v1-abstract-short" style="display: inline;"> X-ray magnetic circular dichroism provides a means to identify ferromagnetic, chiral, and altermagnetic orders via their time-reversal-symmetry ($\mathcal{T}$) breaking. However, differentiating magnetic domains related by crystallographic symmetries remains a technical challenge. Here we reveal a circular dichroism (CD) in the resonant inelastic x-ray scattering (RIXS) spectra from the altermagne… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.10809v1-abstract-full').style.display = 'inline'; document.getElementById('2502.10809v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.10809v1-abstract-full" style="display: none;"> X-ray magnetic circular dichroism provides a means to identify ferromagnetic, chiral, and altermagnetic orders via their time-reversal-symmetry ($\mathcal{T}$) breaking. However, differentiating magnetic domains related by crystallographic symmetries remains a technical challenge. Here we reveal a circular dichroism (CD) in the resonant inelastic x-ray scattering (RIXS) spectra from the altermagnetic MnTe. The azimuthal dependence of the RIXS-CD intensity of the magnon excitations indicates a dominant occupation of a single altermagnetic domain. The RIXS-CD in our scattering geometry is ascribed to the mirror-symmetry breaking associated with the $\mathcal{T}$-broken altermagnetic order. Our results establish RIXS-CD as a domain-sensitive probe of elementary excitations in quantum materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.10809v1-abstract-full').style.display = 'none'; document.getElementById('2502.10809v1-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 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/2501.16034">arXiv:2501.16034</a> <span> [<a href="https://arxiv.org/pdf/2501.16034">pdf</a>, <a href="https://arxiv.org/format/2501.16034">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"> Circular dichroism in resonant inelastic x-ray scattering from birefringence in CuO </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Nag%2C+A">Abhishek Nag</a>, <a href="/search/cond-mat?searchtype=author&query=Perren%2C+G+S">G茅rard Sylvester Perren</a>, <a href="/search/cond-mat?searchtype=author&query=Ueda%2C+H">Hiroki Ueda</a>, <a href="/search/cond-mat?searchtype=author&query=Boothroyd%2C+A+T">A. T. Boothroyd</a>, <a href="/search/cond-mat?searchtype=author&query=Prabhakaran%2C+D">D. Prabhakaran</a>, <a href="/search/cond-mat?searchtype=author&query=Garc%C3%ADa-Fern%C3%A1ndez%2C+M">M. Garc铆a-Fern谩ndez</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Staub%2C+U">Urs Staub</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="2501.16034v1-abstract-short" style="display: inline;"> Resonant inelastic x-ray scattering (RIXS) has become a prominent technique to study quasiparticle excitations. With advances in polarization analysis capabilities at different facilities, RIXS offers exceptional potential for investigating symmetry-broken quasiparticles like chiral phonons and magnons. At optical wavelengths birefringence can severely affect polarization states in low-symmetry sy… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.16034v1-abstract-full').style.display = 'inline'; document.getElementById('2501.16034v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.16034v1-abstract-full" style="display: none;"> Resonant inelastic x-ray scattering (RIXS) has become a prominent technique to study quasiparticle excitations. With advances in polarization analysis capabilities at different facilities, RIXS offers exceptional potential for investigating symmetry-broken quasiparticles like chiral phonons and magnons. At optical wavelengths birefringence can severely affect polarization states in low-symmetry systems. Here we show its importance for soft x-ray resonances. Given the growing interest in Circular Dichroism (CD) in RIXS, it is important to evaluate how birefringence may affect the RIXS spectra of anisotropic systems. We investigate CuO, a well-known anisotropic material, using Cu $L_3$-edge RIXS and detect significant CD in both magnetic and orbital excitations in the collinear antiferromagnetic phase. We demonstrate that the CD can be modeled by a proper treatment of RIXS scattering amplitudes derived from single-ion calculations with birefringence. Recognizing these effects is crucial for unambiguous identification of subtle dichroic effects induced by symmetry-broken quasiparticles. Furthermore, the combined sensitivity of RIXS and birefringence to local symmetry presents an opportunity to study microscopic changes driven by external perturbations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.16034v1-abstract-full').style.display = 'none'; document.getElementById('2501.16034v1-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 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">Main Text of 7 Pages including references and 4 figures. Supplementary of 6 pages appended</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2501.09915">arXiv:2501.09915</a> <span> [<a href="https://arxiv.org/pdf/2501.09915">pdf</a>, <a href="https://arxiv.org/format/2501.09915">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="Other Condensed Matter">cond-mat.other</span> </div> </div> <p class="title is-5 mathjax"> Non-Hermitian Aharonov-Bohm Cage in Bosonic Bogoliubov-de Gennes Systems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kunling Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zeng%2C+B">Bowen Zeng</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+Y">Yong Hu</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="2501.09915v2-abstract-short" style="display: inline;"> The non-Hermitian Aharonov-Bohm (AB) cage is a unique localization phenomenon that confines all possible excitations. This confinement leads to fully flat spectra in momentum space, which are typically accompanied with the degeneracy with various types. Classifying the degeneracy type is crucial for studying the dynamical properties of the non-Hermitian AB cage, but the methods for such classifica… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.09915v2-abstract-full').style.display = 'inline'; document.getElementById('2501.09915v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2501.09915v2-abstract-full" style="display: none;"> The non-Hermitian Aharonov-Bohm (AB) cage is a unique localization phenomenon that confines all possible excitations. This confinement leads to fully flat spectra in momentum space, which are typically accompanied with the degeneracy with various types. Classifying the degeneracy type is crucial for studying the dynamical properties of the non-Hermitian AB cage, but the methods for such classification and their physical connections remain not very clear. Here, we construct a non-Hermitian AB cage in a bosonic Bogoliubov-de Gennes (BdG) system with various types of degenerate flat bands (DFBs). Using the transfer matrix, we demonstrate the localization mechanism for the formation of AB cage and derive the minimal polynomial in mathematics for classifying the degeneracy types of DFBs, thus providing comprehensive understanding of the correspondence among the degeneracy type of DFBs, the minimal polynomial, and the transfer matrix. With such correspondence, we propose a scheme to realize highly degenerate flat bands. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2501.09915v2-abstract-full').style.display = 'none'; document.getElementById('2501.09915v2-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 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">10 pages, 4 figures, one table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.13704">arXiv:2412.13704</a> <span> [<a href="https://arxiv.org/pdf/2412.13704">pdf</a>, <a href="https://arxiv.org/format/2412.13704">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> </div> </div> <p class="title is-5 mathjax"> Diffusion models and stochastic quantisation in lattice field theory </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Aarts%2C+G">Gert Aarts</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+L">Lingxiao Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kai Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2412.13704v1-abstract-short" style="display: inline;"> Diffusion models are currently the leading generative AI approach used for image generation in e.g. DALL-E and Stable Diffusion. In this talk we relate diffusion models to stochastic quantisation in field theory and employ it to generate configurations for scalar fields on a two-dimensional lattice. We end with some speculations on possible applications. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.13704v1-abstract-full" style="display: none;"> Diffusion models are currently the leading generative AI approach used for image generation in e.g. DALL-E and Stable Diffusion. In this talk we relate diffusion models to stochastic quantisation in field theory and employ it to generate configurations for scalar fields on a two-dimensional lattice. We end with some speculations on possible applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.13704v1-abstract-full').style.display = 'none'; document.getElementById('2412.13704v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 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">7 pages + references. Proceedings of the 41st International Symposium on Lattice Field Theory (Lattice 2024), July 28th - August 3rd, 2024, University of Liverpool, UK</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> RIKEN-iTHEMS-Report-24 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2412.04633">arXiv:2412.04633</a> <span> [<a href="https://arxiv.org/pdf/2412.04633">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"> Surface molecular engineering to enable processing of sulfide solid electrolytes in humid ambient air </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+M">Mengchen Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Hong%2C+J+J">Jessica J. Hong</a>, <a href="/search/cond-mat?searchtype=author&query=Sebti%2C+E">Elias Sebti</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+S">Shen Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+S">Shijie Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Pennebaker%2C+T">Tyler Pennebaker</a>, <a href="/search/cond-mat?searchtype=author&query=Hui%2C+Z">Zeyu Hui</a>, <a href="/search/cond-mat?searchtype=author&query=Miao%2C+Q">Qiushi Miao</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+E">Ershuang Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Harpak%2C+N">Nimrod Harpak</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+S">Sicen Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+J">Jianbin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Oh%2C+J+W">Jeong Woo Oh</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+M">Min-Sang Song</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+J">Jian Luo</a>, <a href="/search/cond-mat?searchtype=author&query=Cl%C3%A9ment%2C+R+J">Rapha毛le J. Cl茅ment</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+P">Ping 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="2412.04633v1-abstract-short" style="display: inline;"> Sulfide solid state electrolytes are promising candidates to realize all solid state batteries due to their superior ionic conductivity and excellent ductility. However, their hypersensitivity to moisture requires processing environments that are not compatible with todays lithium ion battery manufacturing infrastructure. Herein, we present a reversible surface modification strategy that enables t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.04633v1-abstract-full').style.display = 'inline'; document.getElementById('2412.04633v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2412.04633v1-abstract-full" style="display: none;"> Sulfide solid state electrolytes are promising candidates to realize all solid state batteries due to their superior ionic conductivity and excellent ductility. However, their hypersensitivity to moisture requires processing environments that are not compatible with todays lithium ion battery manufacturing infrastructure. Herein, we present a reversible surface modification strategy that enables the processability of sulfide SSEs under humid ambient air. We demonstrate that a long chain alkyl thiol, undecanethiol, is chemically compatible with the electrolyte with negligible impact on its ion conductivity. Importantly, the thiol modification extends the amount of time that the sulfide SSE can be exposed to air with 33 percent relative humidity with limited degradation of its structure while retaining a conductivity of above 1 mS per cm for up to 2 days, a more than 100 fold improvement in protection time over competing approaches. Experimental and computational results reveal that the thiol group anchors to the SSE surface, while the hydrophobic hydrocarbon tail provides protection by repelling water. The modified Li6PS5Cl SSE maintains its function after exposure to ambient humidity when implemented in a Li0.5In LiNi0.8Co0.1Mn0.1O2 ASSB. The proposed protection strategy based on surface molecular interactions represents a major step forward towards cost competitive and energy efficient sulfide SSE manufacturing for ASSB applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2412.04633v1-abstract-full').style.display = 'none'; document.getElementById('2412.04633v1-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">38 pages, 6 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/2410.21212">arXiv:2410.21212</a> <span> [<a href="https://arxiv.org/pdf/2410.21212">pdf</a>, <a href="https://arxiv.org/format/2410.21212">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Lattice">hep-lat</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="Machine Learning">cs.LG</span> </div> </div> <p class="title is-5 mathjax"> On learning higher-order cumulants in diffusion models </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Aarts%2C+G">Gert Aarts</a>, <a href="/search/cond-mat?searchtype=author&query=Habibi%2C+D+E">Diaa E. Habibi</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+L">Lingxiao Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kai Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2410.21212v1-abstract-short" style="display: inline;"> To analyse how diffusion models learn correlations beyond Gaussian ones, we study the behaviour of higher-order cumulants, or connected n-point functions, under both the forward and backward process. We derive explicit expressions for the moment- and cumulant-generating functionals, in terms of the distribution of the initial data and properties of forward process. It is shown analytically that du… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.21212v1-abstract-full').style.display = 'inline'; document.getElementById('2410.21212v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.21212v1-abstract-full" style="display: none;"> To analyse how diffusion models learn correlations beyond Gaussian ones, we study the behaviour of higher-order cumulants, or connected n-point functions, under both the forward and backward process. We derive explicit expressions for the moment- and cumulant-generating functionals, in terms of the distribution of the initial data and properties of forward process. It is shown analytically that during the forward process higher-order cumulants are conserved in models without a drift, such as the variance-expanding scheme, and that therefore the endpoint of the forward process maintains nontrivial correlations. We demonstrate that since these correlations are encoded in the score function, higher-order cumulants are learnt in the backward process, also when starting from a normal prior. We confirm our analytical results in an exactly solvable toy model with nonzero cumulants and in scalar lattice field theory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.21212v1-abstract-full').style.display = 'none'; document.getElementById('2410.21212v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">21 pages, many figures. Extended version of contribution accepted in the NeurIPS 2024 workshop "Machine Learning and the Physical Sciences"</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> RIKEN-iTHEMS-Report-24 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2410.13319">arXiv:2410.13319</a> <span> [<a href="https://arxiv.org/pdf/2410.13319">pdf</a>, <a href="https://arxiv.org/format/2410.13319">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"> Evolution of pairing symmetry in FeSe$_{1-x}$S$_x$ as probed by uniaxial-strain tuning of $T_c$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Liu%2C+R">Ruixian Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Tang%2C+Q">Qi Tang</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+C">Chang Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+C">Chunyi Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaijuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Q">Qiaoyu Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+X">Xingye 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="2410.13319v2-abstract-short" style="display: inline;"> In iron-based superconductors (FeSCs), the interplay between electronic nematicity and superconductivity is essential for understanding the exotic superconducting ground state. In the nematic regime, uniaxial-strain ($\varepsilon$) tuning of the superconducting transition temperature $T_c$ [$螖T_c(\varepsilon)=伪\varepsilon+尾\varepsilon^2$] offers a unique approach to investigating the evolution of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.13319v2-abstract-full').style.display = 'inline'; document.getElementById('2410.13319v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2410.13319v2-abstract-full" style="display: none;"> In iron-based superconductors (FeSCs), the interplay between electronic nematicity and superconductivity is essential for understanding the exotic superconducting ground state. In the nematic regime, uniaxial-strain ($\varepsilon$) tuning of the superconducting transition temperature $T_c$ [$螖T_c(\varepsilon)=伪\varepsilon+尾\varepsilon^2$] offers a unique approach to investigating the evolution of pairing symmetry if both $s$ and $d$ wave pairing instabilities are relevant. Here, we employ uniaxial strain to tune the $T_c$ of FeSe$_{1-x}$S$_x$, in which both nematicity and superconductivity undergo significant changes with doping. While $T_c$ is usually suppressed quadratically with $\varepsilon$ in optimally doped BaFe$_2$As$_2$, $螖T_c(\varepsilon)$ in FeSe$_{1-x}$S$_x$ dominated by $螖T_c(\varepsilon)=尾\varepsilon^2$ changes its sign from $尾$ < $0$ in FeSe to $尾$ > $0$ in FeSe$_{1-x}$S$_x$ ($x\gtrsim0.10$), indicating an evolution of the pairing symmetry from an $s_{\pm}$ state towards an $s+d$ wave state. These findings highlight the $螖T_c(\varepsilon)$ as a powerful probe for elucidating the superconducting pairing symmetry in the nematic regime of FeSCs and provide new insights into the evolution of pairing symmetry in FeSCs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2410.13319v2-abstract-full').style.display = 'none'; document.getElementById('2410.13319v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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, 4 figures. Supplementary is available upon reasonable request</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.08196">arXiv:2409.08196</a> <span> [<a href="https://arxiv.org/pdf/2409.08196">pdf</a>, <a href="https://arxiv.org/format/2409.08196">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Acoustic higher-order topological insulator from momentum-space nonsymmorphic symmetries </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hu%2C+J">Jinbing Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kai Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+T">Tianle Song</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+X">Xuntao Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhuang%2C+S">Songlin Zhuang</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+Y">Yi Yang</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="2409.08196v1-abstract-short" style="display: inline;"> Momentum-space nonsymmorphic symmetries, stemming from the projective algebra of synthetic gauge fields, can modify the manifold of the Brillouin zone and lead to a variety of topological phenomena. We present an acoustic realization of higher-order topological insulators (HOTIs) protected by a pair of anticommutative momentum-space glide reflections. We confirm the presence of momentum-space glid… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.08196v1-abstract-full').style.display = 'inline'; document.getElementById('2409.08196v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.08196v1-abstract-full" style="display: none;"> Momentum-space nonsymmorphic symmetries, stemming from the projective algebra of synthetic gauge fields, can modify the manifold of the Brillouin zone and lead to a variety of topological phenomena. We present an acoustic realization of higher-order topological insulators (HOTIs) protected by a pair of anticommutative momentum-space glide reflections. We confirm the presence of momentum-space glide reflection from the measured momentum half translation of edge bands and their momentum-resolved probability distribution using a cylinder geometry made of acoustic resonator arrays. In particular, we observe both intrinsic and extrinsic HOTI features in such a cylinder: hopping strength variation along the open boundary leads to a bulk gap closure, while that along the closed boundary results in an edge gap closure. In addition, we confirm the presence of quadrupole corner modes with transmission and field distribution measurements. Our observation enriches the study of topological physics of momentum-space nonsymmorphic symmetries. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.08196v1-abstract-full').style.display = 'none'; document.getElementById('2409.08196v1-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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/2409.07705">arXiv:2409.07705</a> <span> [<a href="https://arxiv.org/pdf/2409.07705">pdf</a>, <a href="https://arxiv.org/format/2409.07705">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Orbital inversion and emergent lattice dynamics in infinite layer CaCoO$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Jost%2C+D">Daniel Jost</a>, <a href="/search/cond-mat?searchtype=author&query=Lomeli%2C+E+G">Eder G. Lomeli</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+W+J">Woo Jin Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Been%2C+E+M">Emily M. Been</a>, <a href="/search/cond-mat?searchtype=author&query=Rossi%2C+M">Matteo Rossi</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kejin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Jia%2C+C">Chunjing Jia</a>, <a href="/search/cond-mat?searchtype=author&query=Moritz%2C+B">Brian Moritz</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+Z">Zhi-Xun Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Hwang%2C+H+Y">Harold Y. Hwang</a>, <a href="/search/cond-mat?searchtype=author&query=Devereaux%2C+T+P">Thomas P. Devereaux</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+W">Wei-Sheng Lee</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="2409.07705v1-abstract-short" style="display: inline;"> The layered cobaltate CaCoO$_2$ exhibits a unique herringbone-like structure. Serving as a potential prototype for a new class of complex lattice patterns, we study the properties of CaCoO$_2$ using X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). Our results reveal a significant inter-plane hybridization between the Ca $4s-$ and Co $3d-$orbitals, leading to an i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.07705v1-abstract-full').style.display = 'inline'; document.getElementById('2409.07705v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.07705v1-abstract-full" style="display: none;"> The layered cobaltate CaCoO$_2$ exhibits a unique herringbone-like structure. Serving as a potential prototype for a new class of complex lattice patterns, we study the properties of CaCoO$_2$ using X-ray absorption spectroscopy (XAS) and resonant inelastic X-ray scattering (RIXS). Our results reveal a significant inter-plane hybridization between the Ca $4s-$ and Co $3d-$orbitals, leading to an inversion of the textbook orbital occupation of a square planar geometry. Further, our RIXS data reveal a strong low energy mode, with anomalous intensity modulations as a function of momentum transfer close to a quasi-static response suggestive of electronic and/or orbital ordering. These findings indicate that the newly discovered herringbone structure exhibited in CaCoO$_2$ may serve as a promising laboratory for the design of materials having strong electronic, orbital and lattice correlations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.07705v1-abstract-full').style.display = 'none'; document.getElementById('2409.07705v1-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.06333">arXiv:2409.06333</a> <span> [<a href="https://arxiv.org/pdf/2409.06333">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acsnano.3c11391">10.1021/acsnano.3c11391 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ferroelasticity in Two-Dimensional Hybrid Ruddlesden$-$Popper Perovskites Mediated by Cross-Plane Intermolecular Coupling and Metastable Funnel-Like Phases </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kripalani%2C+D+R">Devesh R. Kripalani</a>, <a href="/search/cond-mat?searchtype=author&query=Guan%2C+Q">Qiye Guan</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+H">Hejin Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Cai%2C+Y">Yongqing Cai</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kun Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.06333v1-abstract-short" style="display: inline;"> Ferroelasticity describes a phenomenon in which a material exhibits two or more equally stable orientation variants and can be switched from one form to another under an applied stress. Recent works have demonstrated that two-dimensional layered organic$-$inorganic hybrid Ruddlesden$-$Popper perovskites can serve as ideal platforms for realizing ferroelasticity, however, the ferroelastic (FE) beha… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.06333v1-abstract-full').style.display = 'inline'; document.getElementById('2409.06333v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.06333v1-abstract-full" style="display: none;"> Ferroelasticity describes a phenomenon in which a material exhibits two or more equally stable orientation variants and can be switched from one form to another under an applied stress. Recent works have demonstrated that two-dimensional layered organic$-$inorganic hybrid Ruddlesden$-$Popper perovskites can serve as ideal platforms for realizing ferroelasticity, however, the ferroelastic (FE) behavior of structures with a single octahedra layer such as (BA)$_2$PbI$_4$ (BA = CH$_3$(CH$_2$)$_3$NH$_3$$^+$) has remained elusive. Herein, by using a combined first-principles and metadynamics approach, the FE behavior of (BA)$_2$PbI$_4$ under mechanical and thermal stresses is uncovered. FE switching is mediated by cross-plane intermolecular coupling, which could occur through multiple rotational modes, rendering the formation of FE domains and several metastable paraelastic (PE) phases. Such metastable phases are akin to wrinkled structures in other layered materials and can act as a "funnel" of hole carriers. Thermal excitation tends to flatten the kinetic barriers of the transition pathways between orientation variants, suggesting an enhanced concentration of metastable PE states at high temperatures, while halogen mixing with Br raises these barriers and conversely lowers the concentration of PE states. These findings reveal the rich structural diversity of (BA)$_2$PbI$_4$ domains, which can play a vital role in enhancing the optoelectronic properties of the perovskite and raise exciting prospects for mechanical switching, shape memory, and information processing. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.06333v1-abstract-full').style.display = 'none'; document.getElementById('2409.06333v1-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 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ACS Nano (2024), 18(22), 14187-14197 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.03275">arXiv:2409.03275</a> <span> [<a href="https://arxiv.org/pdf/2409.03275">pdf</a>, <a href="https://arxiv.org/format/2409.03275">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.111.L041406">10.1103/PhysRevB.111.L041406 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Inverse Design of Winding Tuple for Non-Hermitian Topological Edge Modes </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yang%2C+Z">Zihe Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kunling Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zeng%2C+B">Bowen Zeng</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+Y">Yong Hu</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="2409.03275v3-abstract-short" style="display: inline;"> The interplay between topological localization and non-Hermiticity localization in non-Hermitian crystal systems results in a diversity of shapes of topological edge modes (EMs), offering opportunities to manipulate these modes for potential topological applications. The characterization of the domain of EMs and the engineering of these EMs require detailed information about their wave functions,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.03275v3-abstract-full').style.display = 'inline'; document.getElementById('2409.03275v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.03275v3-abstract-full" style="display: none;"> The interplay between topological localization and non-Hermiticity localization in non-Hermitian crystal systems results in a diversity of shapes of topological edge modes (EMs), offering opportunities to manipulate these modes for potential topological applications. The characterization of the domain of EMs and the engineering of these EMs require detailed information about their wave functions, which conventional calculation of topological invariants cannot provide. In this Letter, by recognizing EMs as specified solutions of eigenequation, we derive their wave functions in an extended non-Hermitian Su-Schrieffer-Heeger model. We then inversely construct a winding tuple $\left \{ w_{\scriptscriptstyle GBZ},w_{\scriptscriptstyle BZ}\right \} $ that characterizes the existence of EMs and their spatial distribution. Moreover, we define a novel spectral winding number equivalent to $w_{\scriptscriptstyle BZ}$, which is determined by the product of energies of different bands. The inverse design of topological invariants allows us to categorize the localized nature of EMs even in systems lacking sublattice symmetry, which can facilitate the manipulation and utilization of EMs in the development of novel quantum materials and devices. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.03275v3-abstract-full').style.display = 'none'; document.getElementById('2409.03275v3-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 January, 2025; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 111, L041406 (2025) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.15750">arXiv:2407.15750</a> <span> [<a href="https://arxiv.org/pdf/2407.15750">pdf</a>, <a href="https://arxiv.org/format/2407.15750">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"> Unified Description of Charge Density Waves in Electron- and Hole-doped Cuprate Superconductors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Tu%2C+S">Sijia Tu</a>, <a href="/search/cond-mat?searchtype=author&query=Nag%2C+A">Abhishek Nag</a>, <a href="/search/cond-mat?searchtype=author&query=Tam%2C+C+C">Charles C. Tam</a>, <a href="/search/cond-mat?searchtype=author&query=Tippireddy%2C+S">Sahil Tippireddy</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+Z">Zefeng Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">Mirian Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Jin%2C+K">Kui Jin</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.15750v1-abstract-short" style="display: inline;"> High-temperature cuprates superconductors are characterised by the complex interplay between superconductivity (SC) and charge density wave (CDW) in the context of intertwined competing orders. In contrast to abundant studies for hole-doped cuprates, the exact nature of CDW and its relationship to SC was much less explored in electron-doped counterparts. Here, we performed resonant inelastic x-ray… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15750v1-abstract-full').style.display = 'inline'; document.getElementById('2407.15750v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.15750v1-abstract-full" style="display: none;"> High-temperature cuprates superconductors are characterised by the complex interplay between superconductivity (SC) and charge density wave (CDW) in the context of intertwined competing orders. In contrast to abundant studies for hole-doped cuprates, the exact nature of CDW and its relationship to SC was much less explored in electron-doped counterparts. Here, we performed resonant inelastic x-ray scattering (RIXS) experiments to investigate the relationship between CDW and SC in electron-doped La$_{2-x}$Ce$_x$CuO$_4$. The short-range CDW order with a correlation length $\sim35$~脜~was found in a wide range of temperature and doping concentration. Near the optimal doping, the CDW order is weakened inside the SC phase, implying an intimate relationship between the two orders. This interplay has been commonly reported in hole-doped La-based cuprates near the optimal doping. We reconciled the diverging behaviour of CDW across the superconducting phase in various cuprate materials by introducing the CDW correlation length as a key parameter. Our study paves the way for establishing a unified picture to describe the phenomenology of CDW and its relationship with SC in the cuprate family. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15750v1-abstract-full').style.display = 'none'; document.getElementById('2407.15750v1-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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 5 figures; Supplementary Materials available upon request</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.15692">arXiv:2407.15692</a> <span> [<a href="https://arxiv.org/pdf/2407.15692">pdf</a>, <a href="https://arxiv.org/format/2407.15692">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/PhysRevResearch.6.043184">10.1103/PhysRevResearch.6.043184 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Impact of electron correlations on two-particle charge response in electron- and hole-doped cuprates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Nag%2C+A">Abhishek Nag</a>, <a href="/search/cond-mat?searchtype=author&query=Zinni%2C+L">Luciano Zinni</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+J">J. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Tu%2C+S">Sijia Tu</a>, <a href="/search/cond-mat?searchtype=author&query=Walters%2C+A+C">A. C. Walters</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Hayden%2C+S+M">S. M. Hayden</a>, <a href="/search/cond-mat?searchtype=author&query=Bejas%2C+M">Mat铆as Bejas</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+Z">Zefeng Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Yamase%2C+H">H. Yamase</a>, <a href="/search/cond-mat?searchtype=author&query=Jin%2C+K">Kui Jin</a>, <a href="/search/cond-mat?searchtype=author&query=Garc%C3%ADa-Fern%C3%A1ndez%2C+M">M. Garc铆a-Fern谩ndez</a>, <a href="/search/cond-mat?searchtype=author&query=Fink%2C+J">J. Fink</a>, <a href="/search/cond-mat?searchtype=author&query=Greco%2C+A">Andr茅s Greco</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.15692v2-abstract-short" style="display: inline;"> Estimating many-body effects that deviate from an independent particle approach, has long been a key research interest in condensed matter physics. Layered cuprates are prototypical systems, where electron-electron interactions are found to strongly affect the dynamics of single-particle excitations. It is however, still unclear how the electron correlations influence charge excitations, such as p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15692v2-abstract-full').style.display = 'inline'; document.getElementById('2407.15692v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.15692v2-abstract-full" style="display: none;"> Estimating many-body effects that deviate from an independent particle approach, has long been a key research interest in condensed matter physics. Layered cuprates are prototypical systems, where electron-electron interactions are found to strongly affect the dynamics of single-particle excitations. It is however, still unclear how the electron correlations influence charge excitations, such as plasmons, which have been variously treated with either weak or strong correlation models. In this work, we demonstrate the hybridised nature of collective valence charge fluctuations leading to dispersing acoustic-like plasmons in hole-doped La$_{1.84}$Sr$_{0.16}$CuO$_{4}$ and electron-doped La$_{1.84}$Ce$_{0.16}$CuO$_{4}$ using the two-particle probe, resonant inelastic x-ray scattering. We then describe the plasmon dispersions in both systems, within both the weak mean-field Random Phase Approximation (RPA) and strong coupling $t$-$J$-$V$ models. The $t$-$J$-$V$ model, which includes the correlation effects implicitly, accurately describes the plasmon dispersions as resonant excitations outside the single-particle intra-band continuum. In comparison, a quantitative description of the plasmon dispersion in the RPA approach is obtained only upon explicit consideration of re-normalized electronic band parameters. Our comparative analysis shows that electron correlations significantly impact the low-energy plasmon excitations across the cuprate doping phase diagram, even at long wavelengths. Thus, complementary information on the evolution of electron correlations, influenced by the rich electronic phases in condensed matter systems, can be extracted through the study of two-particle charge response. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.15692v2-abstract-full').style.display = 'none'; document.getElementById('2407.15692v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Research 6, 043184 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.10268">arXiv:2407.10268</a> <span> [<a href="https://arxiv.org/pdf/2407.10268">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> </div> </div> <p class="title is-5 mathjax"> Weakly Coupled Type-II Superconductivity in a Laves compound ZrRe2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yu%2C+Y">Yingpeng Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Z">Zhaolong Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Q">Qi Li</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Z">Zhaoxu Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yulong Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Hao%2C+M">Munan Hao</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+Y">Yaling Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Gong%2C+C">Chunsheng Gong</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+L">Long Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Xie%2C+Z">Zhenkai Xie</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaiyao Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Ren%2C+H">Huifen Ren</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+X">Xu Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Jin%2C+S">Shifeng Jin</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="2407.10268v1-abstract-short" style="display: inline;"> We present a comprehensive investigation of the superconducting properties of ZrRe2, a Re-based hexagonal Laves compounds. ZrRe2 crystallizes in a C14-type structure (space group P63/mmc), with cell parameters a=b=5.2682(5) and c=8.63045 . Resistivity and magnetic susceptibility data both suggest that ZrRe2 exhibits a sharp superconducting transition above 6.1 K. The measured lower and upper criti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.10268v1-abstract-full').style.display = 'inline'; document.getElementById('2407.10268v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.10268v1-abstract-full" style="display: none;"> We present a comprehensive investigation of the superconducting properties of ZrRe2, a Re-based hexagonal Laves compounds. ZrRe2 crystallizes in a C14-type structure (space group P63/mmc), with cell parameters a=b=5.2682(5) and c=8.63045 . Resistivity and magnetic susceptibility data both suggest that ZrRe2 exhibits a sharp superconducting transition above 6.1 K. The measured lower and upper critical fields are 6.27 mT and 12.77 T, respectively, with a large upper critical field that approached the Pauli limit.Measurements of the heat capacity confirm the presence of bulk superconductivity, with a normalized specific heat change of 1.24 and an electron-phonon strength of 0.69 . DFT calculations revealed that the band structure of ZrRe2 is intricate and without van-Hove singularity. The observed large specific heat jump, combined with the electron-phonon strength , suggests that ZrRe2 is a weakly coupled type II superconductor. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.10268v1-abstract-full').style.display = 'none'; document.getElementById('2407.10268v1-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 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">14 pages,7 figures, 2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.19992">arXiv:2406.19992</a> <span> [<a href="https://arxiv.org/pdf/2406.19992">pdf</a>, <a href="https://arxiv.org/format/2406.19992">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</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.L140302">10.1103/PhysRevB.110.L140302 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Abnormal Frequency Response Determined by Saddle Points in Non-Hermitian Crystal Systems </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kunling Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+J">Jun Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Zeng%2C+B">Bowen Zeng</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+Y">Yong Hu</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="2406.19992v2-abstract-short" style="display: inline;"> In non-Hermitian crystal systems under open boundary condition (OBC), it is generally believed that the OBC modes with frequencies containing positive imaginary parts, when excited by external driving, will experience exponential growth in population, thereby leading to instability. However, our work challenges this conventional understanding. In such a system, we find an anomalous response that g… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.19992v2-abstract-full').style.display = 'inline'; document.getElementById('2406.19992v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.19992v2-abstract-full" style="display: none;"> In non-Hermitian crystal systems under open boundary condition (OBC), it is generally believed that the OBC modes with frequencies containing positive imaginary parts, when excited by external driving, will experience exponential growth in population, thereby leading to instability. However, our work challenges this conventional understanding. In such a system, we find an anomalous response that grows exponentially with the frequency aligned with those of saddle points. The frequencies of these saddle points on the complex plane are below the maximum imaginary part of OBC spectrum, but they can lie within or beyond the OBC spectrum. We derive general formulas of excitation-response relationships and find that this anomalous response can occur because the excitation of OBC modes eventually evolve toward these saddle points at long times. Only when the frequencies of all these saddle points are below the real axis do the non-Hermitian crystal systems remain stable under periodic excitation. Thus our results also provide new insights on the stability criterion of non-Hermitian crystal systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.19992v2-abstract-full').style.display = 'none'; document.getElementById('2406.19992v2-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 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 110, L140302, 2024 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.15062">arXiv:2406.15062</a> <span> [<a href="https://arxiv.org/pdf/2406.15062">pdf</a>, <a href="https://arxiv.org/format/2406.15062">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="Superconductivity">cond-mat.supr-con</span> </div> </div> <p class="title is-5 mathjax"> Decoupling of Static and Dynamic Charge Correlations revealed by Uniaxial Strain in a Cuprate Superconductor </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Martinelli%2C+L">L. Martinelli</a>, <a href="/search/cond-mat?searchtype=author&query=Bia%C5%82o%2C+I">I. Bia艂o</a>, <a href="/search/cond-mat?searchtype=author&query=Hong%2C+X">X. Hong</a>, <a href="/search/cond-mat?searchtype=author&query=Oppliger%2C+J">J. Oppliger</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+C">C. Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Schaller%2C+T">T. Schaller</a>, <a href="/search/cond-mat?searchtype=author&query=K%C3%BCspert%2C+J">J. K眉spert</a>, <a href="/search/cond-mat?searchtype=author&query=Fischer%2C+M+H">M. H. Fischer</a>, <a href="/search/cond-mat?searchtype=author&query=Kurosawa%2C+T">T. Kurosawa</a>, <a href="/search/cond-mat?searchtype=author&query=Momono%2C+N">N. Momono</a>, <a href="/search/cond-mat?searchtype=author&query=Oda%2C+M">M. Oda</a>, <a href="/search/cond-mat?searchtype=author&query=Novikov%2C+D+V">D. V. Novikov</a>, <a href="/search/cond-mat?searchtype=author&query=Khadiev%2C+A">A. Khadiev</a>, <a href="/search/cond-mat?searchtype=author&query=Weschke%2C+E">E. Weschke</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">J. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Q">Q. Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Chang%2C+J">J. Chang</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="2406.15062v3-abstract-short" style="display: inline;"> We use uniaxial strain in combination with ultra-high-resolution Resonant Inelastic X-ray Scattering (RIXS) at the oxygen K- and copper L3-edges to study the excitations stemming from the charge ordering wave vector in La1.875Sr0.125CuO4. By detwinning stripe ordering, we demonstrate that the optical phonon anomalies do not show any stripe anisotropy. The low-energy charge excitations also retain… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15062v3-abstract-full').style.display = 'inline'; document.getElementById('2406.15062v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.15062v3-abstract-full" style="display: none;"> We use uniaxial strain in combination with ultra-high-resolution Resonant Inelastic X-ray Scattering (RIXS) at the oxygen K- and copper L3-edges to study the excitations stemming from the charge ordering wave vector in La1.875Sr0.125CuO4. By detwinning stripe ordering, we demonstrate that the optical phonon anomalies do not show any stripe anisotropy. The low-energy charge excitations also retain an in-plane four-fold symmetry. As such, we find that both phonon and charge excitations are decoupled entirely from the strength of static charge ordering. The almost isotropic character of charge excitations is indicative of a quantum critical behaviour and remains a possible source for the strange metal properties found in the normal state of cuprate superconductors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15062v3-abstract-full').style.display = 'none'; document.getElementById('2406.15062v3-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">v1</span> submitted 21 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">9 pages, 6 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/2406.00863">arXiv:2406.00863</a> <span> [<a href="https://arxiv.org/pdf/2406.00863">pdf</a>, <a href="https://arxiv.org/format/2406.00863">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"> Collapse of a quantum vortex in an attractive two-dimensional Bose gas </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Banerjee%2C+S">Sambit Banerjee</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kai Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Tiwari%2C+S+K">Shiva Kant Tiwari</a>, <a href="/search/cond-mat?searchtype=author&query=Tamura%2C+H">Hikaru Tamura</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+R">Rongjie Li</a>, <a href="/search/cond-mat?searchtype=author&query=Kevrekidis%2C+P">Panayotis Kevrekidis</a>, <a href="/search/cond-mat?searchtype=author&query=Mistakidis%2C+S+I">Simeon I. Mistakidis</a>, <a href="/search/cond-mat?searchtype=author&query=Walther%2C+V">Valentin Walther</a>, <a href="/search/cond-mat?searchtype=author&query=Hung%2C+C">Chen-Lung Hung</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="2406.00863v1-abstract-short" style="display: inline;"> We experimentally and numerically study the collapse dynamics of a quantum vortex in a two-dimensional atomic superfluid following a fast interaction ramp from repulsion to attraction. We find the conditions and time scales for a superfluid vortex to radially converge into a quasi-stationary density profile, demonstrating the first spontaneous formation of a vortex soliton in an atomic Bose gas. W… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.00863v1-abstract-full').style.display = 'inline'; document.getElementById('2406.00863v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.00863v1-abstract-full" style="display: none;"> We experimentally and numerically study the collapse dynamics of a quantum vortex in a two-dimensional atomic superfluid following a fast interaction ramp from repulsion to attraction. We find the conditions and time scales for a superfluid vortex to radially converge into a quasi-stationary density profile, demonstrating the first spontaneous formation of a vortex soliton in an atomic Bose gas. We record an emergent universal dynamics of an azimuthal modulational instability, which amplifies initial density perturbations and leads to the eventual splitting of a vortex soliton or direct fragmentation of a superfluid into disordered, but roughly circular arrays of Townes soliton-like wavepackets. Our study sets the stage for exploring universal out-of-equilibrium dynamics of vortex quantum matter quenched to attractive interactions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.00863v1-abstract-full').style.display = 'none'; document.getElementById('2406.00863v1-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 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.16835">arXiv:2405.16835</a> <span> [<a href="https://arxiv.org/pdf/2405.16835">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"> Superionic surface Li-ion transport in carbonaceous materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+J">Jianbin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+S">Shen Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+C">Chaoshan Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Qi%2C+J">Ji Qi</a>, <a href="/search/cond-mat?searchtype=author&query=Wan%2C+H">Hongli Wan</a>, <a href="/search/cond-mat?searchtype=author&query=Lai%2C+S">Shen Lai</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+S">Shijie Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Ko%2C+T+W">Tsz Wai Ko</a>, <a href="/search/cond-mat?searchtype=author&query=Liang%2C+Z">Zhaohui Liang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Harpak%2C+N">Nimrod Harpak</a>, <a href="/search/cond-mat?searchtype=author&query=Solan%2C+N">Nick Solan</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+M">Mengchen Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Hui%2C+Z">Zeyu Hui</a>, <a href="/search/cond-mat?searchtype=author&query=Ai%2C+P+J">Paulina J. Ai</a>, <a href="/search/cond-mat?searchtype=author&query=Griffith%2C+K">Kent Griffith</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+C">Chunsheng Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Ong%2C+S+P">Shyue Ping Ong</a>, <a href="/search/cond-mat?searchtype=author&query=Yao%2C+Y">Yan Yao</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+P">Ping 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="2405.16835v1-abstract-short" style="display: inline;"> Unlike Li-ion transport in the bulk of carbonaceous materials, little is known about Li-ion diffusion on their surface. In this study, we have discovered an ultra-fast Li-ion transport phenomenon on the surface of carbonaceous materials, particularly when they have limited Li insertion capacity along with a high surface area. This is exemplified by a carbon black, Ketjen Black (KB). An ionic condu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.16835v1-abstract-full').style.display = 'inline'; document.getElementById('2405.16835v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.16835v1-abstract-full" style="display: none;"> Unlike Li-ion transport in the bulk of carbonaceous materials, little is known about Li-ion diffusion on their surface. In this study, we have discovered an ultra-fast Li-ion transport phenomenon on the surface of carbonaceous materials, particularly when they have limited Li insertion capacity along with a high surface area. This is exemplified by a carbon black, Ketjen Black (KB). An ionic conductivity of 18.1 mS cm-1 at room temperature is observed, far exceeding most solid-state ion conductors. Theoretical calculations reveal a low diffusion barrier for the surface Li species. The species is also identified as Li*, which features a partial positive charge. As a result, lithiated KB functions effectively as an interlayer between Li and solid-state electrolytes (SSE) to mitigate dendrite growth and cell shorting. This function is found to be electrolyte agnostic, effective for both sulfide and halide SSEs. Further, lithiated KB can act as a high-performance mixed ion/electron conductor that is thermodynamically stable at potentials near Li metal. A graphite anode mixed with KB instead of a solid electrolyte demonstrates full utilization with a capacity retention of ~85% over 300 cycles. The discovery of this surface-mediated ultra-fast Li-ion transport mechanism provides new directions for the design of solid-state ion conductors and solid-state batteries. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.16835v1-abstract-full').style.display = 'none'; document.getElementById('2405.16835v1-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 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">21 pages, 6 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/2404.19410">arXiv:2404.19410</a> <span> [<a href="https://arxiv.org/pdf/2404.19410">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="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="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1093/pnasnexus/pgae100">10.1093/pnasnexus/pgae100 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sarkar%2C+S">Subhrangsu Sarkar</a>, <a href="/search/cond-mat?searchtype=author&query=Capu%2C+R">Roxana Capu</a>, <a href="/search/cond-mat?searchtype=author&query=Pashkevich%2C+Y+G">Yurii G. Pashkevich</a>, <a href="/search/cond-mat?searchtype=author&query=Knobel%2C+J">Jonas Knobel</a>, <a href="/search/cond-mat?searchtype=author&query=Cantarino%2C+M+R">Marli R. Cantarino</a>, <a href="/search/cond-mat?searchtype=author&query=Nag%2C+A">Abhishek Nag</a>, <a href="/search/cond-mat?searchtype=author&query=Kummer%2C+K">Kurt Kummer</a>, <a href="/search/cond-mat?searchtype=author&query=Betto%2C+D">Davide Betto</a>, <a href="/search/cond-mat?searchtype=author&query=Sant%2C+R">Roberto Sant</a>, <a href="/search/cond-mat?searchtype=author&query=Nicholson%2C+C+W">Christopher W. Nicholson</a>, <a href="/search/cond-mat?searchtype=author&query=Khmaladze%2C+J">Jarji Khmaladze</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-jin. Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Brookes%2C+N+B">Nicholas B. Brookes</a>, <a href="/search/cond-mat?searchtype=author&query=Monney%2C+C">Claude Monney</a>, <a href="/search/cond-mat?searchtype=author&query=Bernhard%2C+C">Christian Bernhard</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="2404.19410v1-abstract-short" style="display: inline;"> Heterostructures from complex oxides allow one to combine various electronic and magnetic orders as to induce new quantum states. A prominent example is the coupling between superconducting and magnetic orders in multilayers from high-Tc cuprates and manganites. A key role is played here by the interfacial CuO2 layer whose distinct properties remain to be fully understood. Here, we study with reso… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.19410v1-abstract-full').style.display = 'inline'; document.getElementById('2404.19410v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.19410v1-abstract-full" style="display: none;"> Heterostructures from complex oxides allow one to combine various electronic and magnetic orders as to induce new quantum states. A prominent example is the coupling between superconducting and magnetic orders in multilayers from high-Tc cuprates and manganites. A key role is played here by the interfacial CuO2 layer whose distinct properties remain to be fully understood. Here, we study with resonant inelastic X-ray scattering (RIXS) the magnon excitations of this interfacial CuO2 layer. In particular, we show that the underlying antiferromagnetic exchange interaction at the interface is strongly suppressed to J ~ 70 meV, as compared to J ~ 130 meV for the CuO2 layers away from the interface. Moreover, we observe an anomalous momentum dependence of the intensity of the interfacial magnon mode and show that it suggests that the antiferromagnetic order is accompanied by a particular kind of orbital order that yields a so-called altermagnetic state. Such a two-dimensional altermagnet has recently been predicted to enable new spintronic applications and superconducting proximity effects. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.19410v1-abstract-full').style.display = 'none'; document.getElementById('2404.19410v1-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> 30 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PNAS Nexus, Volume 3, Issue 4, April 2024, pgae100 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.05175">arXiv:2404.05175</a> <span> [<a href="https://arxiv.org/pdf/2404.05175">pdf</a>, <a href="https://arxiv.org/format/2404.05175">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"> Solute strengthening and softening from screw dislocation in BCC tantalum: A first-principles study </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Feng%2C+J">Jiajun Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kangzhi Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+X">Xiaowei Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Fu%2C+X">Xiao Fu</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+Q">Qiuting Luo</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Z">Ziran 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="2404.05175v1-abstract-short" style="display: inline;"> Improving the high-temperature performance and low-temperature plasticity of tantalum (Ta) alloys is a significant scientific challenge. We employed first-principles calculations to study the interaction between screw dislocations and solute atoms in the body centered cubic (BCC) structure of Ta, with a particular focus on solid solution softening and strengthening. We analyzed the impact of vario… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.05175v1-abstract-full').style.display = 'inline'; document.getElementById('2404.05175v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.05175v1-abstract-full" style="display: none;"> Improving the high-temperature performance and low-temperature plasticity of tantalum (Ta) alloys is a significant scientific challenge. We employed first-principles calculations to study the interaction between screw dislocations and solute atoms in the body centered cubic (BCC) structure of Ta, with a particular focus on solid solution softening and strengthening. We analyzed the impact of various solute elements on the generalized stacking fault energy (GSFE), energy barriers within the single-atom column displacement model, and their interaction with screw dislocations. The results indicate that Hf and Zr, either individually or in combination, exhibit notable solute softening effects in BCC Ta, significantly reducing GSFE, energy barriers, and interaction energies. In contrast, Nb shows relative insensitivity to solute effects, while Mo, W, and Ir demonstrate solute strengthening effects. The calculations suggest that the interaction energy between screw dislocations and solute atoms is a reliable indicator for predicting strengthening and softening effects. Additionally, we extend these predictions to ternary alloys, demonstrating that the strengthening and softening phenomena in these materials can be explained through the electronic work function at the electronic level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.05175v1-abstract-full').style.display = 'none'; document.getElementById('2404.05175v1-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 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.04897">arXiv:2404.04897</a> <span> [<a href="https://arxiv.org/pdf/2404.04897">pdf</a>, <a href="https://arxiv.org/format/2404.04897">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"> Electronic origin of solute effects on the mobility of screw dislocation in bcc molybdenum </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kangzhi Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+J">Jiajun Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Z">Ziran Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Deng%2C+H">Huiqiu Deng</a>, <a href="/search/cond-mat?searchtype=author&query=Jia%2C+L">Lixia Jia</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+X">Xinfu 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="2404.04897v1-abstract-short" style="display: inline;"> In body-centered cubic (bcc) metals such as molybdenum, screw dislocations often exhibit non-Schmid behavior, moving in directions unpredicted by the Schmid law. The mobility of these dislocations is notably influenced by the presence of solute atoms within the alloy matrix. In this study, employing first-principles calculations, we delve into the electronic origins of these influences.Initially,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04897v1-abstract-full').style.display = 'inline'; document.getElementById('2404.04897v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.04897v1-abstract-full" style="display: none;"> In body-centered cubic (bcc) metals such as molybdenum, screw dislocations often exhibit non-Schmid behavior, moving in directions unpredicted by the Schmid law. The mobility of these dislocations is notably influenced by the presence of solute atoms within the alloy matrix. In this study, employing first-principles calculations, we delve into the electronic origins of these influences.Initially, we construct both single atomic column and triple atomic column models to simulate the formation of screw dislocations with solute atoms. Our investigation reveals that tantalum (Ta) and tungsten (W) increase the formation energy of solute-dislocation complexes, in contrast to osmium (Os), iridium (Ir), and platinum (Pt). Subsequently, employing a comprehensive screw dislocation dipole model under shear deformation, we explore the combined effects of solute atoms and deformation on dislocation core movement. Our findings demonstrate that Ta and W, positioned as first nearest neighbors, reduce the stress required to move dislocation cores away from corresponding dislocation dipoles. Conversely, Os, Ir, and Pt exhibit an attractive effect on dislocation cores, lowering the energy barrier for screw dislocation formation and enticing dislocation cores towards these solute atoms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.04897v1-abstract-full').style.display = 'none'; document.getElementById('2404.04897v1-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 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.01399">arXiv:2403.01399</a> <span> [<a href="https://arxiv.org/pdf/2403.01399">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.chemmater.4c00669">10.1021/acs.chemmater.4c00669 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Noncentrosymmetric Nowotny Chimney Ladder Ferromagnet Cr4Ge7 with a High Curie Temperature of ~ 207 K </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yu%2C+Z">Zhenhai Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaijuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Hou%2C+X">Xiaofei Hou</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+X">Xuejiao Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Tao%2C+Z">Zhen Tao</a>, <a href="/search/cond-mat?searchtype=author&query=Ye%2C+Y">Yunguan Ye</a>, <a href="/search/cond-mat?searchtype=author&query=Xia%2C+W">Wei Xia</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zhongyang Li</a>, <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+J">Jinggeng Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+W">Wei Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+Z">Ziyi Liu</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+X">Xia Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+N">Na Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Cheng%2C+J">Jinguang Cheng</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+J">Jianlin Luo</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+Q">Qiang Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Pomjakushin%2C+V">Vladimir Pomjakushin</a>, <a href="/search/cond-mat?searchtype=author&query=Zhong%2C+Z">Zhicheng Zhong</a>, <a href="/search/cond-mat?searchtype=author&query=Rui%2C+S+J">Soh Jian Rui</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+X">Xingye Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+Y">Yanfeng 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="2403.01399v1-abstract-short" style="display: inline;"> Noncentrosymmetric magnets usually host intriguing magnetic interactions inherent the crystal structure with broken inversion symmetry, which can give rise to rich magnetic behaviors. We report herein the high-pressure synthesis, crystal structure, magnetizations and magnetic structure of a so-called Nowotny chimney ladder compound Cr4Ge7. Our analysis on the powder neutron diffraction data revise… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.01399v1-abstract-full').style.display = 'inline'; document.getElementById('2403.01399v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.01399v1-abstract-full" style="display: none;"> Noncentrosymmetric magnets usually host intriguing magnetic interactions inherent the crystal structure with broken inversion symmetry, which can give rise to rich magnetic behaviors. We report herein the high-pressure synthesis, crystal structure, magnetizations and magnetic structure of a so-called Nowotny chimney ladder compound Cr4Ge7. Our analysis on the powder neutron diffraction data revises the crystal structure as a noncentrosymmetric space group (P-4c2, No.116). It exhibits two magnetic orders within the temperature range of 2 - 400 K. The first order at ~ 207 K associated with a small magnetic moment of ~ 0.75 miuB is assigned to a commensurate ferromagnetic structure with a propagation vector k = (0, 0, 0). The weak itinerant ferromagnet nature should be caused by the complex Cr spin orders from different Wyckoff positions. The second order at ~ 18 K is assumed to arise from a competition between the Dzyaloshinskii-Moria and Heisenberg interactions. The results provide an excellent platform for study on intricate interactions between various magnetic exchanges as well as for the exploration of high temperature exotic magnetic properties which host potential applications in next-generation spintronics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.01399v1-abstract-full').style.display = 'none'; document.getElementById('2403.01399v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">21 pages, 5 figures, 2 tables; Supporting Information is not included</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Chemistry of Materials, 2024 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.00728">arXiv:2403.00728</a> <span> [<a href="https://arxiv.org/pdf/2403.00728">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/10.1002/adma.202310668">10.1002/adma.202310668 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Emergence of interfacial magnetism in strongly-correlated nickelate-titanate superlattices </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Asmara%2C+T+C">Teguh Citra Asmara</a>, <a href="/search/cond-mat?searchtype=author&query=Green%2C+R+J">Robert J. Green</a>, <a href="/search/cond-mat?searchtype=author&query=Suter%2C+A">Andreas Suter</a>, <a href="/search/cond-mat?searchtype=author&query=Wei%2C+Y">Yuan Wei</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+W">Wenliang Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Knez%2C+D">Daniel Knez</a>, <a href="/search/cond-mat?searchtype=author&query=Harris%2C+G">Grant Harris</a>, <a href="/search/cond-mat?searchtype=author&query=Tseng%2C+Y">Yi Tseng</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+T">Tianlun Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Betto%2C+D">Davide Betto</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">Mirian Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Klein%2C+Y+M">Yannick Maximilian Klein</a>, <a href="/search/cond-mat?searchtype=author&query=Kumar%2C+N">Neeraj Kumar</a>, <a href="/search/cond-mat?searchtype=author&query=Galdino%2C+C+W">Carlos William Galdino</a>, <a href="/search/cond-mat?searchtype=author&query=Salman%2C+Z">Zaher Salman</a>, <a href="/search/cond-mat?searchtype=author&query=Prokscha%2C+T">Thomas Prokscha</a>, <a href="/search/cond-mat?searchtype=author&query=Medarde%2C+M">Marisa Medarde</a>, <a href="/search/cond-mat?searchtype=author&query=M%C3%BCller%2C+E">Elisabeth M眉ller</a>, <a href="/search/cond-mat?searchtype=author&query=Soh%2C+Y">Yona Soh</a>, <a href="/search/cond-mat?searchtype=author&query=Brookes%2C+N+B">Nicholas B. Brookes</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Radovic%2C+M">Milan Radovic</a>, <a href="/search/cond-mat?searchtype=author&query=Schmitt%2C+T">Thorsten Schmitt</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="2403.00728v2-abstract-short" style="display: inline;"> Strongly-correlated transition-metal oxides are widely known for their various exotic phenomena. This is exemplified by rare-earth nickelates such as LaNiO$_{3}$, which possess intimate interconnections between their electronic, spin, and lattice degrees of freedom. Their properties can be further enhanced by pairing them in hybrid heterostructures, which can lead to hidden phases and emergent phe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.00728v2-abstract-full').style.display = 'inline'; document.getElementById('2403.00728v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.00728v2-abstract-full" style="display: none;"> Strongly-correlated transition-metal oxides are widely known for their various exotic phenomena. This is exemplified by rare-earth nickelates such as LaNiO$_{3}$, which possess intimate interconnections between their electronic, spin, and lattice degrees of freedom. Their properties can be further enhanced by pairing them in hybrid heterostructures, which can lead to hidden phases and emergent phenomena. An important example is the LaNiO$_{3}$/LaTiO$_{3}$ superlattice, where an interlayer electron transfer has been observed from LaTiO$_{3}$ into LaNiO$_{3}$ leading to a high-spin state. However, macroscopic emergence of magnetic order associated with this high-spin state has so far not been observed. Here, by using muon spin rotation, x-ray absorption, and resonant inelastic x-ray scattering, we present direct evidence of an emergent antiferromagnetic order with high magnon energy and exchange interactions at the LaNiO$_{3}$/LaTiO$_{3}$ interface. As the magnetism is purely interfacial, a single LaNiO$_{3}$/LaTiO$_{3}$ interface can essentially behave as an atomically thin strongly-correlated quasi-two-dimensional antiferromagnet, potentially allowing its technological utilisation in advanced spintronic devices. Furthermore, its strong quasi-two-dimensional magnetic correlations, orbitally-polarized planar ligand holes, and layered superlattice design make its electronic, magnetic, and lattice configurations resemble the precursor states of superconducting cuprates and nickelates, but with an $S \rightarrow 1$ spin state instead. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.00728v2-abstract-full').style.display = 'none'; document.getElementById('2403.00728v2-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">41 pages, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Advanced Materials 36, 2310668 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2403.00493">arXiv:2403.00493</a> <span> [<a href="https://arxiv.org/pdf/2403.00493">pdf</a>, <a href="https://arxiv.org/format/2403.00493">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="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.109.235106">10.1103/PhysRevB.109.235106 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Investigation of spin excitations and charge order in bulk crystals of the infinite-layer nickelate LaNiO$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hayashida%2C+S">S. Hayashida</a>, <a href="/search/cond-mat?searchtype=author&query=Sundaramurthy%2C+V">V. Sundaramurthy</a>, <a href="/search/cond-mat?searchtype=author&query=Puphal%2C+P">P. Puphal</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Fenk%2C+B">B. Fenk</a>, <a href="/search/cond-mat?searchtype=author&query=Isobe%2C+M">M. Isobe</a>, <a href="/search/cond-mat?searchtype=author&query=Minola%2C+M">M. Minola</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+Y+-">Y. -M. Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Suyolcu%2C+Y+E">Y. E. Suyolcu</a>, <a href="/search/cond-mat?searchtype=author&query=van+Aken%2C+P+A">P. A. van Aken</a>, <a href="/search/cond-mat?searchtype=author&query=Keimer%2C+B">B. Keimer</a>, <a href="/search/cond-mat?searchtype=author&query=Hepting%2C+M">M. Hepting</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="2403.00493v2-abstract-short" style="display: inline;"> Recent x-ray spectroscopic studies have revealed spin excitations and charge density waves in thin films of infinite-layer (IL) nickelates. However, clarifying whether the origin of these phenomena is intrinsic to the material class or attributable to impurity phases in the films has presented a major challenge. Here we utilize topotactic methods to synthesize bulk crystals of the IL nickelate LaN… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.00493v2-abstract-full').style.display = 'inline'; document.getElementById('2403.00493v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.00493v2-abstract-full" style="display: none;"> Recent x-ray spectroscopic studies have revealed spin excitations and charge density waves in thin films of infinite-layer (IL) nickelates. However, clarifying whether the origin of these phenomena is intrinsic to the material class or attributable to impurity phases in the films has presented a major challenge. Here we utilize topotactic methods to synthesize bulk crystals of the IL nickelate LaNiO$_2$ with crystallographically oriented surfaces. We examine these crystals using resonant inelastic x-ray scattering (RIXS) at the Ni $L_3$-edge to elucidate the spin and charge correlations in the bulk of the material. While we detect the presence of prominent spin excitations in the crystals, fingerprints of charge order are absent at the ordering vectors identified in previous in thin-film studies. These results contribute to the understanding of the bulk properties of LaNiO$_2$ and establish topotactically synthesized crystals as viable complementary specimens for spectroscopic investigations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.00493v2-abstract-full').style.display = 'none'; document.getElementById('2403.00493v2-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 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 March, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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, 7 figures with supplemental materials</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 109, 235106 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.12657">arXiv:2401.12657</a> <span> [<a href="https://arxiv.org/pdf/2401.12657">pdf</a>, <a href="https://arxiv.org/ps/2401.12657">ps</a>, <a href="https://arxiv.org/format/2401.12657">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 class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-024-53863-5">10.1038/s41467-024-53863-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electronic and magnetic excitations in La$_3$Ni$_2$O$_7$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Chen%2C+X">Xiaoyang Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+Z">Zhicheng Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Mei%2C+J">Jiong Mei</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+K">Kun Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+J">Jie Li</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">Mirian Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+X">Xing Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Sun%2C+H">Hualei Sun</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+D">Dawei Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+M">Meng Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+J">Jiangping Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+Y">Yi Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+D">Donglai Feng</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="2401.12657v1-abstract-short" style="display: inline;"> The striking discovery of high-temperature superconductivity (HTSC) of 80 K in a bilayer nickelate La$_3$Ni$_2$O$_7$ under a moderately high pressure of about 14 GPa ignited a new wave of studying HTSC in nickelates. The properties of the parental phase at ambient pressure may contain key information on basic interactions therein and bosons that may mediate pairing giving birth to superconductivit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12657v1-abstract-full').style.display = 'inline'; document.getElementById('2401.12657v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.12657v1-abstract-full" style="display: none;"> The striking discovery of high-temperature superconductivity (HTSC) of 80 K in a bilayer nickelate La$_3$Ni$_2$O$_7$ under a moderately high pressure of about 14 GPa ignited a new wave of studying HTSC in nickelates. The properties of the parental phase at ambient pressure may contain key information on basic interactions therein and bosons that may mediate pairing giving birth to superconductivity. Moreover, the bilayer structure of La$_3$Ni$_2$O$_7$ may suggest a distinct minimal model in comparison to cuprate superconductors. Here using X-ray absorption spectroscopy and resonant inelastic X-ray scattering, we studied La$_3$Ni$_2$O$_7$ at ambient pressure, and found that Ni 3$d_{x^2-y^2}$, Ni 3$d_{z^2}$, and ligand oxygen 2$p$ orbitals dominate the low-energy physics with a small charge-transfer energy. Remarkably, well-defined optical-like magnetic excitations were found to soften into a quasi-static spin-density-wave ordering, evidencing the strong electronic correlations and rich magnetic properties. Based on a Heisenberg spin model, we found that the inter-layer effective magnetic superexchange interaction is much larger than the intra-layer ones, and proposed two viable magnetic structures. Our results set the foundation for further exploration of La$_3$Ni$_2$O$_7$ superconductor. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12657v1-abstract-full').style.display = 'none'; document.getElementById('2401.12657v1-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 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications 15, 9597 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.12035">arXiv:2401.12035</a> <span> [<a href="https://arxiv.org/pdf/2401.12035">pdf</a>, <a href="https://arxiv.org/format/2401.12035">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.133.066501">10.1103/PhysRevLett.133.066501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The origin of magnetism in a supposedly nonmagnetic osmium oxide </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Borgatti%2C+F">F. Borgatti</a>, <a href="/search/cond-mat?searchtype=author&query=Florio%2C+P">P. Florio</a>, <a href="/search/cond-mat?searchtype=author&query=Frassineti%2C+J">J. Frassineti</a>, <a href="/search/cond-mat?searchtype=author&query=Mosca%2C+D+F">D. Fiore Mosca</a>, <a href="/search/cond-mat?searchtype=author&query=Faure%2C+Q">Q. Faure</a>, <a href="/search/cond-mat?searchtype=author&query=Detlefs%2C+B">B. Detlefs</a>, <a href="/search/cond-mat?searchtype=author&query=Sahle%2C+C+J">C. J. Sahle</a>, <a href="/search/cond-mat?searchtype=author&query=Francoual%2C+S">S. Francoual</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">J. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K+-">K. -J. Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Mitrovic%2C+V+F">V. F. Mitrovic</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Ghiringhelli%2C+G">G. Ghiringhelli</a>, <a href="/search/cond-mat?searchtype=author&query=Franchini%2C+C">C. Franchini</a>, <a href="/search/cond-mat?searchtype=author&query=Boscherini%2C+F">F. Boscherini</a>, <a href="/search/cond-mat?searchtype=author&query=Sanna%2C+S">S. Sanna</a>, <a href="/search/cond-mat?searchtype=author&query=Sala%2C+a+M+M">and M. Moretti Sala</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="2401.12035v1-abstract-short" style="display: inline;"> A supposedly nonmagnetic 5d$^1$ double perosvkite oxide is investigated by a combination of spectroscopic and theoretical methods, namely resonant inelastic X-ray scattering, X-ray absorption spectroscopy, magnetic circular dichroism, and multiplet ligand field calculations. We found that the large spin-orbit coupling admixes the 5d $t_{2g}$ and $e_g$ orbitals, covalency raises the 5d population w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12035v1-abstract-full').style.display = 'inline'; document.getElementById('2401.12035v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.12035v1-abstract-full" style="display: none;"> A supposedly nonmagnetic 5d$^1$ double perosvkite oxide is investigated by a combination of spectroscopic and theoretical methods, namely resonant inelastic X-ray scattering, X-ray absorption spectroscopy, magnetic circular dichroism, and multiplet ligand field calculations. We found that the large spin-orbit coupling admixes the 5d $t_{2g}$ and $e_g$ orbitals, covalency raises the 5d population well above the nominal value, and the local symmetry is lower than $O_h$. The obtained electronic interactions account for the finite magnetic moment of Os in this compound and, in general, of 5d$^1$ ions. Our results provide direct evidence of elusive Jahn-Teller distortions, hinting at a strong electron-lattice coupling. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12035v1-abstract-full').style.display = 'none'; document.getElementById('2401.12035v1-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 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 133, 066501 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.16444">arXiv:2312.16444</a> <span> [<a href="https://arxiv.org/pdf/2312.16444">pdf</a>, <a href="https://arxiv.org/format/2312.16444">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> </div> <p class="title is-5 mathjax"> Universal orbital and magnetic structures in infinite-layer nickelates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Rossi%2C+M">M. Rossi</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+H">H. Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+K">K. Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Goodge%2C+B+H">B. H. Goodge</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">J. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Osada%2C+M">M. Osada</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+Y">Y. Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+D">D. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+B+Y">B. Y. Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Jost%2C+D">D. Jost</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+Z+X">Z. X. Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Been%2C+E">E. Been</a>, <a href="/search/cond-mat?searchtype=author&query=Moritz%2C+B">B. Moritz</a>, <a href="/search/cond-mat?searchtype=author&query=Kourkoutis%2C+L+F">L. F. Kourkoutis</a>, <a href="/search/cond-mat?searchtype=author&query=Devereaux%2C+T+P">T. P. Devereaux</a>, <a href="/search/cond-mat?searchtype=author&query=Hwang%2C+H+Y">H. Y. Hwang</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+W+S">W. S. Lee</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="2312.16444v1-abstract-short" style="display: inline;"> We conducted a comparative study of the rare-earth infinite-layer nickelates films, RNiO2 (R = La, Pr, and Nd) using resonant inelastic X-ray scattering (RIXS). We found that the gross features of the orbital configurations are essentially the same, with minor variations in the detailed hybridization. For low-energy excitations, we unambiguously confirm the presence of damped magnetic excitations… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.16444v1-abstract-full').style.display = 'inline'; document.getElementById('2312.16444v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.16444v1-abstract-full" style="display: none;"> We conducted a comparative study of the rare-earth infinite-layer nickelates films, RNiO2 (R = La, Pr, and Nd) using resonant inelastic X-ray scattering (RIXS). We found that the gross features of the orbital configurations are essentially the same, with minor variations in the detailed hybridization. For low-energy excitations, we unambiguously confirm the presence of damped magnetic excitations in all three compounds. By fitting to a linear spin-wave theory, comparable spin exchange coupling strengths and damping coefficients are extracted, indicating a universal magnetic structure in the infinite-layer nickelates. Interestingly, while signatures of a charge order are observed in LaNiO2 in the quasi-elastic region of the RIXS spectrum, it is absent in NdNiO2 and PrNiO2. This prompts further investigation into the universality and the origins of charge order within the infinite-layer inickelates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.16444v1-abstract-full').style.display = 'none'; document.getElementById('2312.16444v1-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 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </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 figures. Accepted by Physical Review 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/2312.11601">arXiv:2312.11601</a> <span> [<a href="https://arxiv.org/pdf/2312.11601">pdf</a>, <a href="https://arxiv.org/format/2312.11601">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</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="High Energy Physics - Experiment">hep-ex</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/JHEP05(2024)314">10.1007/JHEP05(2024)314 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Physical Signatures of Fermion-Coupled Axion Dark Matter </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Berlin%2C+A">Asher Berlin</a>, <a href="/search/cond-mat?searchtype=author&query=Millar%2C+A+J">Alexander J. Millar</a>, <a href="/search/cond-mat?searchtype=author&query=Trickle%2C+T">Tanner Trickle</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kevin Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2312.11601v2-abstract-short" style="display: inline;"> In the presence of axion dark matter, fermion spins experience an "axion wind" torque and an "axioelectric" force. We investigate new experimental probes of these effects and find that magnetized analogs of multilayer dielectric haloscopes can explore orders of magnitude of new parameter space for the axion-electron coupling. We also revisit the calculation of axion absorption into in-medium excit… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.11601v2-abstract-full').style.display = 'inline'; document.getElementById('2312.11601v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.11601v2-abstract-full" style="display: none;"> In the presence of axion dark matter, fermion spins experience an "axion wind" torque and an "axioelectric" force. We investigate new experimental probes of these effects and find that magnetized analogs of multilayer dielectric haloscopes can explore orders of magnitude of new parameter space for the axion-electron coupling. We also revisit the calculation of axion absorption into in-medium excitations, showing that axioelectric absorption is screened in spin-polarized targets, and axion wind absorption can be characterized in terms of a magnetic energy loss function. Finally, our detailed theoretical treatment allows us to critically examine recent claims in the literature. We find that axioelectric corrections to electronic energy levels are smaller than previously estimated and that the purported electron electric dipole moment due to a constant axion field is entirely spurious. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.11601v2-abstract-full').style.display = 'none'; document.getElementById('2312.11601v2-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 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </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">58 pages, 8 figures. v2: discussion expanded, matches journal version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> FERMILAB-PUB-23-779-SQMS-T, SLAC-PUB-17758 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 05 (2024) 314 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.08260">arXiv:2312.08260</a> <span> [<a href="https://arxiv.org/pdf/2312.08260">pdf</a>, <a href="https://arxiv.org/format/2312.08260">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"> Spin fluctuations sufficient to mediate superconductivity in nickelates </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Worm%2C+P">Paul Worm</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Q">Qisi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Kitatani%2C+M">Motoharu Kitatani</a>, <a href="/search/cond-mat?searchtype=author&query=Bia%C5%82o%2C+I">Izabela Bia艂o</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+Q">Qiang Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Ren%2C+X">Xiaolin Ren</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Csontosov%C3%A1%2C+D">Diana Csontosov谩</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+X">Xingjiang Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+Z">Zhihai Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Si%2C+L">Liang Si</a>, <a href="/search/cond-mat?searchtype=author&query=Chang%2C+J">Johan Chang</a>, <a href="/search/cond-mat?searchtype=author&query=Tomczak%2C+J+M">Jan M. Tomczak</a>, <a href="/search/cond-mat?searchtype=author&query=Held%2C+K">Karsten Held</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="2312.08260v1-abstract-short" style="display: inline;"> Infinite-layer nickelates show high-temperature superconductivity, and the experimental phase diagram agrees well with the one simulated within the dynamical vertex approximation (D$螕$A). Here, we compare the spin-fluctuation spectrum behind these calculations to resonant inelastic X-ray scattering experiments. The overall agreement is good. This independent cross-validation of the strength of spi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.08260v1-abstract-full').style.display = 'inline'; document.getElementById('2312.08260v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.08260v1-abstract-full" style="display: none;"> Infinite-layer nickelates show high-temperature superconductivity, and the experimental phase diagram agrees well with the one simulated within the dynamical vertex approximation (D$螕$A). Here, we compare the spin-fluctuation spectrum behind these calculations to resonant inelastic X-ray scattering experiments. The overall agreement is good. This independent cross-validation of the strength of spin fluctuations strongly supports the scenario, advanced by D$螕$A, that spin-fluctuations are the mediator of the superconductivity observed in nickelates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.08260v1-abstract-full').style.display = 'none'; document.getElementById('2312.08260v1-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </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">13 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/2312.04406">arXiv:2312.04406</a> <span> [<a href="https://arxiv.org/pdf/2312.04406">pdf</a>, <a href="https://arxiv.org/format/2312.04406">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"> Resolving the Orbital Character of Low-energy Excitations in Mott Insulator with Intermediate Spin-orbit Coupling </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=von+Arx%2C+K">K. von Arx</a>, <a href="/search/cond-mat?searchtype=author&query=Rothenb%C3%BChler%2C+P">P. Rothenb眉hler</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Q">Qisi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">J. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Vecchione%2C+A">A. Vecchione</a>, <a href="/search/cond-mat?searchtype=author&query=Fittipaldi%2C+R">R. Fittipaldi</a>, <a href="/search/cond-mat?searchtype=author&query=Sassa%2C+Y">Y. Sassa</a>, <a href="/search/cond-mat?searchtype=author&query=Cuoco%2C+M">M. Cuoco</a>, <a href="/search/cond-mat?searchtype=author&query=Forte%2C+F">F. Forte</a>, <a href="/search/cond-mat?searchtype=author&query=Chang%2C+J">J. Chang</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="2312.04406v1-abstract-short" style="display: inline;"> Multi-band Mott insulators with moderate spin-orbit and Hund's coupling are key reference points for theoretical concept developments of correlated electron systems. The ruthenate Mott insulator Ca$_{2}$RuO$_{4}$ has therefore been intensively studied by spectroscopic probes. However, it has been challenging to resolve the fundamental excitations emerging from the hierarchy of electronic energy sc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.04406v1-abstract-full').style.display = 'inline'; document.getElementById('2312.04406v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.04406v1-abstract-full" style="display: none;"> Multi-band Mott insulators with moderate spin-orbit and Hund's coupling are key reference points for theoretical concept developments of correlated electron systems. The ruthenate Mott insulator Ca$_{2}$RuO$_{4}$ has therefore been intensively studied by spectroscopic probes. However, it has been challenging to resolve the fundamental excitations emerging from the hierarchy of electronic energy scales. Here we apply state-of-the-art resonant inelastic x-ray scattering to probe deeper into the electronic excitations found in Ca$_{2}$RuO$_{4}$. In this fashion, we probe a series of spin-orbital excitations at low energies and resolve the level splitting of the intra-$t_{2g}$ structure due to spin-orbit coupling and crystal field splitting. Most importantly, the low-energy excitations exhibit strong orbital character. Such direct determination of relevant electronic energy scales is important, as it sharpens the target for theory developments of Mott insulators' orbital degree of freedom. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.04406v1-abstract-full').style.display = 'none'; document.getElementById('2312.04406v1-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.04276">arXiv:2312.04276</a> <span> [<a href="https://arxiv.org/pdf/2312.04276">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> </div> </div> <p class="title is-5 mathjax"> Unusual Sign Reversal of Field-like Spin-Orbit Torque in Pt/Ni/Py with an Ultrathin Ni Spacer </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zishuang Li</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+W">Wenqiang Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaiyuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zhan%2C+X">Xiang Zhan</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+T">Tiejun Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+R">Ronghua 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="2312.04276v2-abstract-short" style="display: inline;"> The magnetization manipulation by spin-orbit torques (SOTs) in nonmagnetic-metal (NM)/ferromagnet (FM) heterostructures has provided great opportunities for spin devices. Besides the conventional spin Hall effect (SHE) in heavy metals with strong spin-orbit coupling, the orbital currents have been proposed to be another promising approach to generate strong SOTs. Here, we systematically study the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.04276v2-abstract-full').style.display = 'inline'; document.getElementById('2312.04276v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.04276v2-abstract-full" style="display: none;"> The magnetization manipulation by spin-orbit torques (SOTs) in nonmagnetic-metal (NM)/ferromagnet (FM) heterostructures has provided great opportunities for spin devices. Besides the conventional spin Hall effect (SHE) in heavy metals with strong spin-orbit coupling, the orbital currents have been proposed to be another promising approach to generate strong SOTs. Here, we systematically study the SOTs efficiency and its dependence on the FM thickness and different NM/FM interfaces in two prototypical Pt/Py and Ta/Py systems by inserting an ultrathin magnetic layer (0.4 nm thick ML = Co, Fe, Gd, and Ni). The dampinglike (DL) torque efficiency $尉_{DL}$ is significantly enhanced by inserting ultrathin Co, Fe, and Ni layers and is noticeably suppressed for the Gd insertion. Moreover, the Ni insertion results in a sign change of the field-like (FL) torque in Pt/Py and substantially reduces $尉_{DL}$ in Ta/Py. These results are likely related to the additional spin currents generated by combining the orbital Hall effect (OHE) in the NM and orbital-to-spin conversion in the ML insertion layer and/or their interfaces, especially for the Ni insertion. Our results demonstrate that inserting ultrathin ML can effectively manipulate the strength and sign of the SOTs, which would be helpful for spintronics applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.04276v2-abstract-full').style.display = 'none'; document.getElementById('2312.04276v2-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.01169">arXiv:2311.01169</a> <span> [<a href="https://arxiv.org/pdf/2311.01169">pdf</a>, <a href="https://arxiv.org/format/2311.01169">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link 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="Instrumentation and Methods for Astrophysics">astro-ph.IM</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="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Physics and Society">physics.soc-ph</span> </div> </div> <p class="title is-5 mathjax"> Resource-aware Research on Universe and Matter: Call-to-Action in Digital Transformation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Bruers%2C+B">Ben Bruers</a>, <a href="/search/cond-mat?searchtype=author&query=Cruces%2C+M">Marilyn Cruces</a>, <a href="/search/cond-mat?searchtype=author&query=Demleitner%2C+M">Markus Demleitner</a>, <a href="/search/cond-mat?searchtype=author&query=Duckeck%2C+G">Guenter Duckeck</a>, <a href="/search/cond-mat?searchtype=author&query=D%C3%BCren%2C+M">Michael D眉ren</a>, <a href="/search/cond-mat?searchtype=author&query=Eich%2C+N">Niclas Eich</a>, <a href="/search/cond-mat?searchtype=author&query=En%C3%9Flin%2C+T">Torsten En脽lin</a>, <a href="/search/cond-mat?searchtype=author&query=Erdmann%2C+J">Johannes Erdmann</a>, <a href="/search/cond-mat?searchtype=author&query=Erdmann%2C+M">Martin Erdmann</a>, <a href="/search/cond-mat?searchtype=author&query=Fackeldey%2C+P">Peter Fackeldey</a>, <a href="/search/cond-mat?searchtype=author&query=Felder%2C+C">Christian Felder</a>, <a href="/search/cond-mat?searchtype=author&query=Fischer%2C+B">Benjamin Fischer</a>, <a href="/search/cond-mat?searchtype=author&query=Fr%C3%B6se%2C+S">Stefan Fr枚se</a>, <a href="/search/cond-mat?searchtype=author&query=Funk%2C+S">Stefan Funk</a>, <a href="/search/cond-mat?searchtype=author&query=Gasthuber%2C+M">Martin Gasthuber</a>, <a href="/search/cond-mat?searchtype=author&query=Grimshaw%2C+A">Andrew Grimshaw</a>, <a href="/search/cond-mat?searchtype=author&query=Hadasch%2C+D">Daniela Hadasch</a>, <a href="/search/cond-mat?searchtype=author&query=Hannemann%2C+M">Moritz Hannemann</a>, <a href="/search/cond-mat?searchtype=author&query=Kappes%2C+A">Alexander Kappes</a>, <a href="/search/cond-mat?searchtype=author&query=Kleinem%C3%BChl%2C+R">Raphael Kleinem眉hl</a>, <a href="/search/cond-mat?searchtype=author&query=Kozlov%2C+O+M">Oleksiy M. Kozlov</a>, <a href="/search/cond-mat?searchtype=author&query=Kuhr%2C+T">Thomas Kuhr</a>, <a href="/search/cond-mat?searchtype=author&query=Lupberger%2C+M">Michael Lupberger</a>, <a href="/search/cond-mat?searchtype=author&query=Neuhaus%2C+S">Simon Neuhaus</a>, <a href="/search/cond-mat?searchtype=author&query=Niknejadi%2C+P">Pardis Niknejadi</a> , et al. (12 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="2311.01169v1-abstract-short" style="display: inline;"> Given the urgency to reduce fossil fuel energy production to make climate tipping points less likely, we call for resource-aware knowledge gain in the research areas on Universe and Matter with emphasis on the digital transformation. A portfolio of measures is described in detail and then summarized according to the timescales required for their implementation. The measures will both contribute to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.01169v1-abstract-full').style.display = 'inline'; document.getElementById('2311.01169v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.01169v1-abstract-full" style="display: none;"> Given the urgency to reduce fossil fuel energy production to make climate tipping points less likely, we call for resource-aware knowledge gain in the research areas on Universe and Matter with emphasis on the digital transformation. A portfolio of measures is described in detail and then summarized according to the timescales required for their implementation. The measures will both contribute to sustainable research and accelerate scientific progress through increased awareness of resource usage. This work is based on a three-days workshop on sustainability in digital transformation held in May 2023. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.01169v1-abstract-full').style.display = 'none'; document.getElementById('2311.01169v1-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 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 2 figures, publication following workshop 'Sustainability in the Digital Transformation of Basic Research on Universe & Matter', 30 May to 2 June 2023, Meinerzhagen, Germany, https://indico.desy.de/event/37480</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.13214">arXiv:2310.13214</a> <span> [<a href="https://arxiv.org/pdf/2310.13214">pdf</a>, <a href="https://arxiv.org/format/2310.13214">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="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.132.056002">10.1103/PhysRevLett.132.056002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Evolution of the magnetic excitations in electron-doped $\mathrm{La}_{2-x} \mathrm{Ce}_x \mathrm{CuO}_{4}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Li%2C+X+T">X. T. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Tu%2C+S+J">S. J. Tu</a>, <a href="/search/cond-mat?searchtype=author&query=Chaix%2C+L">L. Chaix</a>, <a href="/search/cond-mat?searchtype=author&query=Fawaz%2C+C">C. Fawaz</a>, <a href="/search/cond-mat?searchtype=author&query=d%27Astuto%2C+M">M. d'Astuto</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+X">X. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Yakhou-Harris%2C+F">F. Yakhou-Harris</a>, <a href="/search/cond-mat?searchtype=author&query=Kummer%2C+K">K. Kummer</a>, <a href="/search/cond-mat?searchtype=author&query=Brookes%2C+N+B">N. B. Brookes</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K+J">K. J. Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Lin%2C+Z+F">Z. F. Lin</a>, <a href="/search/cond-mat?searchtype=author&query=Yuan%2C+J">J. Yuan</a>, <a href="/search/cond-mat?searchtype=author&query=Jin%2C+K">K. Jin</a>, <a href="/search/cond-mat?searchtype=author&query=Dean%2C+M+P+M">M. P. M. Dean</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+X">X. 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="2310.13214v2-abstract-short" style="display: inline;"> We investigated the high energy spin excitations in electron-doped $\mathrm{La}_{2-x} \mathrm{Ce}_x \mathrm{CuO}_{4}$, a cuprate superconductor, by resonant inelastic x-ray scattering (RIXS) measurements. Efforts were paid to disentangle the paramagnon signal from non-spin-flip spectral weight mixing in the RIXS spectrum at $\bf{Q_{\|}}$ = $(0.6蟺, 0)$ and $(0.9蟺, 0)$ along the (1 0) direction. Our… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.13214v2-abstract-full').style.display = 'inline'; document.getElementById('2310.13214v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.13214v2-abstract-full" style="display: none;"> We investigated the high energy spin excitations in electron-doped $\mathrm{La}_{2-x} \mathrm{Ce}_x \mathrm{CuO}_{4}$, a cuprate superconductor, by resonant inelastic x-ray scattering (RIXS) measurements. Efforts were paid to disentangle the paramagnon signal from non-spin-flip spectral weight mixing in the RIXS spectrum at $\bf{Q_{\|}}$ = $(0.6蟺, 0)$ and $(0.9蟺, 0)$ along the (1 0) direction. Our results show that, for doping level x from 0.07 to 0.185, the variation of the paramagnon excitation energy is marginal. We discuss the implication of our results in connection with the evolution of the electron correlation strength in this system. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.13214v2-abstract-full').style.display = 'none'; document.getElementById('2310.13214v2-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 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </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">in press on Phys. Rev. Lett</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 132, 056002 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.10847">arXiv:2310.10847</a> <span> [<a href="https://arxiv.org/pdf/2310.10847">pdf</a>, <a href="https://arxiv.org/format/2310.10847">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.108.155122">10.1103/PhysRevB.108.155122 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Non-local features of the spin-orbit exciton in Kitaev materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Lebert%2C+B+W">Blair W. Lebert</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+S">Subin Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+B+H">Beom Hyun Kim</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=Casa%2C+D">Diego Casa</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kejin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">Mirian Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+Y">Young-June 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="2310.10847v1-abstract-short" style="display: inline;"> A comparative resonant inelastic x-ray scattering (RIXS) study of three well-known Kitaev materials is presented: $伪$-Li$_2$IrO$_3$, Na$_2$IrO$_3$, and $伪$-RuCl$_3$. Despite similar low-energy physics, these materials show distinct electronic properties, such as the large difference in the size of the charge gap. The RIXS spectra of the spin-orbit exciton for these materials show remarkably simila… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.10847v1-abstract-full').style.display = 'inline'; document.getElementById('2310.10847v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.10847v1-abstract-full" style="display: none;"> A comparative resonant inelastic x-ray scattering (RIXS) study of three well-known Kitaev materials is presented: $伪$-Li$_2$IrO$_3$, Na$_2$IrO$_3$, and $伪$-RuCl$_3$. Despite similar low-energy physics, these materials show distinct electronic properties, such as the large difference in the size of the charge gap. The RIXS spectra of the spin-orbit exciton for these materials show remarkably similar three-peak features, including sharp low energy peak (peak A) as well as transitions between $j_{\text{eff}}=1/2$ and $j_{\text{eff}}=3/2$ states. Comparison of experimental spectra with cluster calculations reveals that the observed three-peak structure reflects the significant role that non-local physics plays in the electronic structure of these materials. In particular, the low-energy peak A arises from a holon-doublon pair rather than a conventional particle-hole exciton as proposed earlier. Our study suggests that while spin-orbit assisted Mott insulator is still the best description for these materials, electron itinerancy cannot be ignored when formulating low-energy Hamiltonian of these materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.10847v1-abstract-full').style.display = 'none'; document.getElementById('2310.10847v1-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 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 108, 155122, 2023 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.15989">arXiv:2309.15989</a> <span> [<a href="https://arxiv.org/pdf/2309.15989">pdf</a>, <a href="https://arxiv.org/format/2309.15989">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="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.109.125126">10.1103/PhysRevB.109.125126 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Detection of a two-phonon mode in a cuprate superconductor via polarimetric RIXS </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Scott%2C+K">Kirsty Scott</a>, <a href="/search/cond-mat?searchtype=author&query=Kisiel%2C+E">Elliot Kisiel</a>, <a href="/search/cond-mat?searchtype=author&query=Yakhou%2C+F">Flora Yakhou</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">Mirian Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Kummer%2C+K">Kurt Kummer</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Zhong%2C+R">Ruidan Zhong</a>, <a href="/search/cond-mat?searchtype=author&query=Schneeloch%2C+J+A">John A. Schneeloch</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+G+D">Genda D. Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Brookes%2C+N+B">Nicholas B. Brookes</a>, <a href="/search/cond-mat?searchtype=author&query=Kemper%2C+A+F">Alexander F. Kemper</a>, <a href="/search/cond-mat?searchtype=author&query=Minola%2C+M">Matteo Minola</a>, <a href="/search/cond-mat?searchtype=author&query=Boschini%2C+F">Fabio Boschini</a>, <a href="/search/cond-mat?searchtype=author&query=Frano%2C+A">Alex Frano</a>, <a href="/search/cond-mat?searchtype=author&query=Gozar%2C+A">Adrian Gozar</a>, <a href="/search/cond-mat?searchtype=author&query=Neto%2C+E+H+d+S">Eduardo H. da Silva Neto</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="2309.15989v1-abstract-short" style="display: inline;"> Recent improvements in the energy resolution of resonant inelastic x-ray scattering experiments (RIXS) at the Cu-L$_3$ edge have enabled the study of lattice, spin, and charge excitations. Here, we report on the detection of a low intensity signal at 140meV, twice the energy of the bond-stretching (BS) phonon mode, in the cuprate superconductor… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.15989v1-abstract-full').style.display = 'inline'; document.getElementById('2309.15989v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.15989v1-abstract-full" style="display: none;"> Recent improvements in the energy resolution of resonant inelastic x-ray scattering experiments (RIXS) at the Cu-L$_3$ edge have enabled the study of lattice, spin, and charge excitations. Here, we report on the detection of a low intensity signal at 140meV, twice the energy of the bond-stretching (BS) phonon mode, in the cuprate superconductor $\textrm{Bi}_2\textrm{Sr}_2\textrm{Ca}\textrm{Cu}_2\textrm{O}_{8+x}$ (Bi-2212). Ultra-high resolution polarimetric RIXS measurements allow us to resolve the outgoing polarization of the signal and identify this feature as a two-phonon excitation. Further, we study the connection between the two-phonon mode and the BS one-phonon mode by constructing a joint density of states toy model that reproduces the key features of the data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.15989v1-abstract-full').style.display = 'none'; document.getElementById('2309.15989v1-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/2308.15820">arXiv:2308.15820</a> <span> [<a href="https://arxiv.org/pdf/2308.15820">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/2053-1583/aceb05">10.1088/2053-1583/aceb05 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fermi level depinning via insertion of a graphene buffer layer at the gold-2D tin monoxide contact </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Tian%2C+Y">Yujia Tian</a>, <a href="/search/cond-mat?searchtype=author&query=Kripalani%2C+D+R">Devesh R. Kripalani</a>, <a href="/search/cond-mat?searchtype=author&query=Xue%2C+M">Ming Xue</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kun Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2308.15820v1-abstract-short" style="display: inline;"> Two-dimensional (2D) tin monoxide (SnO) has attracted much attention owing to its distinctive electronic and optical properties, which render itself suitable as a channel material in field effect transistors (FETs). However, upon contact with metals for such applications, the Fermi level pinning effect may occur, where states are induced in its band gap by the metal, hindering its intrinsic semico… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.15820v1-abstract-full').style.display = 'inline'; document.getElementById('2308.15820v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.15820v1-abstract-full" style="display: none;"> Two-dimensional (2D) tin monoxide (SnO) has attracted much attention owing to its distinctive electronic and optical properties, which render itself suitable as a channel material in field effect transistors (FETs). However, upon contact with metals for such applications, the Fermi level pinning effect may occur, where states are induced in its band gap by the metal, hindering its intrinsic semiconducting properties. We propose the insertion of graphene at the contact interface to alleviate the metal-induced gap states. By using gold (Au) as the electrode material and monolayer SnO (mSnO) as the channel material, the geometry, bonding strength, charge transfer and tunnel barriers of charges, and electronic properties including the work function, band structure, density of states, and Schottky barriers are thoroughly investigated using first-principles calculations for the structures with and without graphene to reveal the contact behaviours and Fermi level depinning mechanism. It has been demonstrated that strong covalent bonding is formed between gold and mSnO, while the graphene interlayer forms weak van der Waals interaction with both materials, which minimises the perturbance to the band structure of mSnO. The effects of out-of-plane compression are also analysed to assess the performance of the contact under mechanical deformation, and a feasible fabrication route for the heterostructure with graphene is proposed. This work systematically explores the properties of the Au-mSnO contact for applications in FETs and provides thorough guidance for future exploitation of 2D materials in various electronic applications and for selection of buffer layers to improve metal-semiconductor contact. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.15820v1-abstract-full').style.display = 'none'; document.getElementById('2308.15820v1-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> 30 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </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 figures, published in 2D Materials</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> 2D Materials 10 (2023) 045015 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.14413">arXiv:2308.14413</a> <span> [<a href="https://arxiv.org/pdf/2308.14413">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1039/D2NH00573E">10.1039/D2NH00573E <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Abnormal behavior of preferred formation of cationic vacancy from the interior in 纬-GeSe monolayer with the stereo-chemical antibonding lone-pair state </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Huan%2C+C">Changmeng Huan</a>, <a href="/search/cond-mat?searchtype=author&query=Cai%2C+Y">Yongqing Cai</a>, <a href="/search/cond-mat?searchtype=author&query=Kripalani%2C+D+R">Devesh R. Kripalani</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kun Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Ke%2C+Q">Qingqing Ke</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="2308.14413v1-abstract-short" style="display: inline;"> Two-dimensional (2D) materials tend to have the preferably formation of vacancies at the outer surface. Here, contrary to the normal notion, we reveal a type of vacancy that thermodynamically initiates from the interior part of the 2D backbone of germanium selenide (纬-GeSe). Interestingly, the Ge-vacancy (VGe) in the interior part of 纬-GeSe possesses the lowest formation energy amongst the various… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.14413v1-abstract-full').style.display = 'inline'; document.getElementById('2308.14413v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.14413v1-abstract-full" style="display: none;"> Two-dimensional (2D) materials tend to have the preferably formation of vacancies at the outer surface. Here, contrary to the normal notion, we reveal a type of vacancy that thermodynamically initiates from the interior part of the 2D backbone of germanium selenide (纬-GeSe). Interestingly, the Ge-vacancy (VGe) in the interior part of 纬-GeSe possesses the lowest formation energy amongst the various types of defects considered. We also find a low diffusion barrier (1.04 eV) of VGe which is a half of those of sulfur vacancy in MoS2. The facile formation of mobile VGe is rooted in the antibonding coupling of the lone-pair Ge 4s and Se 4p states near the valence band maximum, which also exists in other gamma-phase MX (M=Sn, Ge; X=S, Te). The VGe is accompanied by a shallow acceptor level in the band gap and induces strong infrared light absorption and p-type conductivity. The VGe located in the middle cationic Ge sublattice is well protected by the surface Se layers-a feature that is absent in other atomically thin materials. Our work suggests that the unique well-buried inner VGe, with the potential of forming structurally protected ultrathin conducting filaments, may render the GeSe layer an ideal platform for quantum emitting, memristive, and neuromorphic applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.14413v1-abstract-full').style.display = 'none'; document.getElementById('2308.14413v1-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 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nanoscale Horiz. 8, 404-411 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.13569">arXiv:2307.13569</a> <span> [<a href="https://arxiv.org/pdf/2307.13569">pdf</a>, <a href="https://arxiv.org/format/2307.13569">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"> Reply to "Comment on newly found Charge Density Waves in infinite layer Nickelates'' </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Tam%2C+C+C">Charles C. Tam</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Ding%2C+X">Xiang Ding</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Nag%2C+A">Abhishek Nag</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+M">Mei Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+B">Bing Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Luo%2C+H">Huiqian Luo</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+P">Peng Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">Mirian Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Qiao%2C+L">Liang Qiao</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2307.13569v1-abstract-short" style="display: inline;"> Charge density waves (CDW) have been reported in NdNiO$_2$ and LaNiO$_2$ thin films grown on SrTiO$_3$ substrates using Ni-$L_3$ resonant x-ray scattering in Refs. [1-3]. In their comment [arXiv:2306.15086] on these reports, Pelliciari et al. found no evidence for a CDW in a NdNiO$_2$ film by performing fixed-momentum energy-dependent measurements. Instead, they observed a nearby non-resonant scat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.13569v1-abstract-full').style.display = 'inline'; document.getElementById('2307.13569v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.13569v1-abstract-full" style="display: none;"> Charge density waves (CDW) have been reported in NdNiO$_2$ and LaNiO$_2$ thin films grown on SrTiO$_3$ substrates using Ni-$L_3$ resonant x-ray scattering in Refs. [1-3]. In their comment [arXiv:2306.15086] on these reports, Pelliciari et al. found no evidence for a CDW in a NdNiO$_2$ film by performing fixed-momentum energy-dependent measurements. Instead, they observed a nearby non-resonant scattering peak, attributed to the (101) substrate reflection, made accessible at Ni-$L_3$ due to third harmonic light contamination. Here we present fixed-momentum energy-dependent resonant inelastic x-ray scattering measurements across Ni-$L_3$ on NdNiO$_2$, used in the preceding study [1]. We see intrinsic Ni-$L_3$ energy profiles at all measured \textbf{Q} values, including a strong resonance effect at $\mathbf{Q}_\mathrm{CDW} = (-1/3, 0, 0.316)$ reciprocal lattice units. Attempts to measure the (101) substrate peak using third harmonic light at Ni-$L_3$ at I21, Diamond were unfruitful. Our results clearly demonstrate the electronic origin of the scattering peak published in Ref. [1] and lack of a detectable structural component in the peak. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.13569v1-abstract-full').style.display = 'none'; document.getElementById('2307.13569v1-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 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.15882">arXiv:2306.15882</a> <span> [<a href="https://arxiv.org/pdf/2306.15882">pdf</a>, <a href="https://arxiv.org/ps/2306.15882">ps</a>, <a href="https://arxiv.org/format/2306.15882">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"> Effect of anisotropic spin-orbit coupling on condensation and superfluidity of a two dimensional Fermi gases </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kezhao Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.15882v2-abstract-short" style="display: inline;"> We investigated the ground state properties of a two dimensional Fermi superfluid with an anisotropic spin-orbit coupling (SOC) using path-integral field theoretical method. Within the framework of mean-field theory, we obtained the condensed fraction including contributions from both singlet and triple pairing fields. We found that for small interaction parameters and large anisotropic parameters… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.15882v2-abstract-full').style.display = 'inline'; document.getElementById('2306.15882v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.15882v2-abstract-full" style="display: none;"> We investigated the ground state properties of a two dimensional Fermi superfluid with an anisotropic spin-orbit coupling (SOC) using path-integral field theoretical method. Within the framework of mean-field theory, we obtained the condensed fraction including contributions from both singlet and triple pairing fields. We found that for small interaction parameters and large anisotropic parameters, the total condensed fraction changes non-monotonically when increasing the strength of SOC and has a global maximum. But this feature disappears with decreasing the anisotropic parameter and increasing the interaction parameter. However, condensed fraction always decrease with increasing the anisotropic parameters. Because of the anisotropy of the SOC, the superfluid fraction becomes a tensor. We obtained the superfluid fraction tensor by deriving the effective action of the phase field of the order parameter. Our numerical results show that for small interaction parameters and large anisotropic parameters, superfluid fraction of the $x$ component $蟻_{x}$ has a minimum as a function of the SOC strength. And this minimum of $蟻_{x}$ disappears when decreasing the anisotropic parameters. In the strong interaction regime, $蟻_{x}$ always decreases with increasing the strength of SOC. While for the $y$ component of the superfluid fraction $蟻_{y}$, no matter how large the interaction parameters and anisotropic parameters are, it always has a minimum as a function of the SOC strength. As a function of the anisotropic parameter, for strong SOC strength, $蟻_{x}<蟻_{y}$ with $蟻_{x}$ having a minimum. For small SOC parameters $蟻_{x}>蟻_{y}$ with $蟻_{y}$ developing a minimum only in the weak interaction limit. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.15882v2-abstract-full').style.display = 'none'; document.getElementById('2306.15882v2-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 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </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, 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/2306.05828">arXiv:2306.05828</a> <span> [<a href="https://arxiv.org/pdf/2306.05828">pdf</a>, <a href="https://arxiv.org/format/2306.05828">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s42005-024-01701-x">10.1038/s42005-024-01701-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Strain-Tuned Magnetic Frustration in a Square Lattice $J_1$-$J_2$ Material </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Bia%C5%82o%2C+I">I. Bia艂o</a>, <a href="/search/cond-mat?searchtype=author&query=Martinelli%2C+L">L. Martinelli</a>, <a href="/search/cond-mat?searchtype=author&query=De+Luca%2C+G">G. De Luca</a>, <a href="/search/cond-mat?searchtype=author&query=Worm%2C+P">P. Worm</a>, <a href="/search/cond-mat?searchtype=author&query=Drewanowski%2C+A">A. Drewanowski</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">J. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Kummer%2C+K">K. Kummer</a>, <a href="/search/cond-mat?searchtype=author&query=Brookes%2C+N+B">N. B. Brookes</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+L">L. Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Edgeton%2C+A">A. Edgeton</a>, <a href="/search/cond-mat?searchtype=author&query=Eom%2C+C+B">C. B. Eom</a>, <a href="/search/cond-mat?searchtype=author&query=Tomczak%2C+J+M">J. M. Tomczak</a>, <a href="/search/cond-mat?searchtype=author&query=Held%2C+K">K. Held</a>, <a href="/search/cond-mat?searchtype=author&query=Gibert%2C+M">M. Gibert</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Q">Qisi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Chang%2C+J">J. Chang</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="2306.05828v2-abstract-short" style="display: inline;"> Magnetic frustration is a route that can lead to the emergence of novel ground states, including spin liquids and spin ices. Such frustration can be introduced through either the geometry of lattice structures or by incompatible exchange interactions. Identifying suitable strategies to control the degree of magnetic frustration in real systems is an active field of research. In this study, we devi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.05828v2-abstract-full').style.display = 'inline'; document.getElementById('2306.05828v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.05828v2-abstract-full" style="display: none;"> Magnetic frustration is a route that can lead to the emergence of novel ground states, including spin liquids and spin ices. Such frustration can be introduced through either the geometry of lattice structures or by incompatible exchange interactions. Identifying suitable strategies to control the degree of magnetic frustration in real systems is an active field of research. In this study, we devise a design principle for the tuning of frustrated magnetism on the square lattice through the manipulation of nearest (NN) and next-nearest neighbor (NNN) antiferromagnetic (AF) exchange interactions. By studying the magnon excitations in epitaxially-strained La$_2$NiO$_4$ films using resonant inelastic x-ray scattering (RIXS) we show that, in contrast to the cuprates, the dispersion peaks at the AF zone boundary. This indicates the presence of an AF-NNN spin interaction. Using first principles simulations and an effective spin-model, we demonstrate the AF-NNN coupling to be a consequence of the two-orbital nature of La$_2$NiO$_4$. Our results demonstrate that compressive strain can enhance this coupling, providing a design principle for the tunability of frustrated magnetism on a square lattice. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.05828v2-abstract-full').style.display = 'none'; document.getElementById('2306.05828v2-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 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Commun. Phys. 7, 230 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.03094">arXiv:2306.03094</a> <span> [<a href="https://arxiv.org/pdf/2306.03094">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"> Calculation of Special Spin Behavior of Dy3+ in DyFe1-xCrxO3 System by Molecular Field Model </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Gao%2C+K">Kaiyang Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kexuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Shen%2C+J">Jiyu Shen</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+Z">Zeyi Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Gong%2C+C">Chenying Gong</a>, <a href="/search/cond-mat?searchtype=author&query=Wu%2C+Z">Zhongjin Wu</a>, <a href="/search/cond-mat?searchtype=author&query=Shi%2C+K">Ke Shi</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+J">Jing Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Z">Zhaoyi Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+M">Min 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="2306.03094v1-abstract-short" style="display: inline;"> In this study, the sol-gel method synthesized the magnetic measurement and analysis of single-phase polycrystalline perovskite DyFe1-xCrxO3 (DFCO). The experimental data were fitted and calculated by a four-sublattice molecular field model. Unlike previous studies, we found that in DyFe1-xCrxO3, the spin of the A-site rare earth ion Dy3+ also changed simultaneously with the spin reorientation of t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.03094v1-abstract-full').style.display = 'inline'; document.getElementById('2306.03094v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.03094v1-abstract-full" style="display: none;"> In this study, the sol-gel method synthesized the magnetic measurement and analysis of single-phase polycrystalline perovskite DyFe1-xCrxO3 (DFCO). The experimental data were fitted and calculated by a four-sublattice molecular field model. Unlike previous studies, we found that in DyFe1-xCrxO3, the spin of the A-site rare earth ion Dy3+ also changed simultaneously with the spin reorientation of the Fe3+/Cr3+ ions. The effective spin is defined as the projection of the A site's total spin on the B site's spin plane, and the curve of temperature changes is obtained after fitting. With this theory, a very accurate thermomagnetic curve is obtained by fitting. This is convincing and, at the same time, provides a reference for the development of spintronic devices in the future. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.03094v1-abstract-full').style.display = 'none'; document.getElementById('2306.03094v1-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.12762">arXiv:2305.12762</a> <span> [<a href="https://arxiv.org/pdf/2305.12762">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> </div> </div> <p class="title is-5 mathjax"> Promoted Electronic Coupling of Acoustic Phonon Modes in Doped Semimetallic MoTe2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Cui%2C+X">Xiangyue Cui</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+H">Hejin Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+X">Xuefei Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kun Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Cai%2C+Y">Yongqing Cai</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="2305.12762v1-abstract-short" style="display: inline;"> As a prototype of the Weyl superconductor, layered molybdenum telluride (MoTe2) encompasses two semimetallic phases (1T_prime and Td) which differentiate from each other via a slight tilting of the out-of-plane lattice. Both phases are subjected to serious phase mixing which complicates the analysis of its origin of superconductivity. Herein, we explore the electron-phonon coupling (EPC) of the mo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.12762v1-abstract-full').style.display = 'inline'; document.getElementById('2305.12762v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.12762v1-abstract-full" style="display: none;"> As a prototype of the Weyl superconductor, layered molybdenum telluride (MoTe2) encompasses two semimetallic phases (1T_prime and Td) which differentiate from each other via a slight tilting of the out-of-plane lattice. Both phases are subjected to serious phase mixing which complicates the analysis of its origin of superconductivity. Herein, we explore the electron-phonon coupling (EPC) of the monolayer semimetallic MoTe2, without phase ambiguity under this thickness limit. Apart from the hardening or softening of phonon modes, the strength of the EPC can be strongly modulated by doping. Specifically, longitudinal and out-of-plane acoustic modes are significantly activated for electron doped MoTe2. This is ascribed to the presence of rich valley states and equispaced nesting bands which are dynamically populated under charge doping. Through comparing the monolayer and bilayer MoTe2, the strength of EPC is found to be less likely to depend on thickness for neutral samples but clearly promoted for thinner samples with electron doping, while for hole doping, the strength alters more significantly with the thickness than doping. Our work explains the puzzling issue of the doping sensitivity of the superconductivity in semimetallic MoTe2 and establishes the critical role of activating acoustic phonons in such low-dimensional materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.12762v1-abstract-full').style.display = 'none'; document.getElementById('2305.12762v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> ACS Nano 17, 16530-16538 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.04424">arXiv:2305.04424</a> <span> [<a href="https://arxiv.org/pdf/2305.04424">pdf</a>, <a href="https://arxiv.org/format/2305.04424">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"> Uniaxial-Strain Tuning of the Intertwined Orders in BaFe$_2$(As$_{1-x}$P$_{x}$)$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+Z">Zinan Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+D">Ding Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Fu%2C+X">Xue Fu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaijuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+Y">Yanhong Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Tan%2C+G">Guotai Tan</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+X">Xingye Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Dai%2C+P">Pengcheng Dai</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="2305.04424v1-abstract-short" style="display: inline;"> An experimental determination of electronic phase diagrams of high-transition temperature (high-$T_c$) superconductors forms the basis for a microscopic understanding of unconventional superconductivity. For most high-$T_c$ superconductors, the electronic phase diagrams are established through partial chemical substitution, which also induces lattice disorder. Here we show that symmetry-specific u… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.04424v1-abstract-full').style.display = 'inline'; document.getElementById('2305.04424v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.04424v1-abstract-full" style="display: none;"> An experimental determination of electronic phase diagrams of high-transition temperature (high-$T_c$) superconductors forms the basis for a microscopic understanding of unconventional superconductivity. For most high-$T_c$ superconductors, the electronic phase diagrams are established through partial chemical substitution, which also induces lattice disorder. Here we show that symmetry-specific uniaxial strain can be used to study electronic phases in iron-based superconductors, composed of two-dimensional nearly square iron lattice planed separated by other elements. By applying tunable uniaxial strain along different high symmetry directions and carrying out transport measurements, we establish strain-tuning dependent electronic nematicity, antiferromagnetic (AF) order, and superconductivity of BaFe$_2$(As$_{1-x}$P$_{x}$)$_2$ superconductor. We find that uniaxial strain along the nearest Fe-Fe direction can dramatically tune the AF order and superconductivity, producing an electronic phase diagram clearly different from the chemical substitution-induced one. Our results thus establish strain tuning as a way to study the intertwined orders in correlated electron materials without using chemical substitution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.04424v1-abstract-full').style.display = 'none'; document.getElementById('2305.04424v1-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 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.09366">arXiv:2304.09366</a> <span> [<a href="https://arxiv.org/pdf/2304.09366">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> </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/10.1088/1674-1056/ac5c37">10.1088/1674-1056/ac5c37 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thickness-dependent magnetic properties in Pt[CoNi]n multilayers with perpendicular magnetic anisotropy </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yan%2C+C">Chunjie Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+L">Lina Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaiyuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+L">Liupeng Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Fu%2C+Q">Qingwei Fu</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+W">Wenqiang Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Yue%2C+W">Wen-Cheng Yue</a>, <a href="/search/cond-mat?searchtype=author&query=Liang%2C+L">Like Liang</a>, <a href="/search/cond-mat?searchtype=author&query=Tao%2C+Z">Zui Tao</a>, <a href="/search/cond-mat?searchtype=author&query=Du%2C+J">Jun Du</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Y">Yong-Lei Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+R">Ronghua 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="2304.09366v1-abstract-short" style="display: inline;"> We systematically investigated the Ni and Co thickness-dependent perpendicular magnetic anisotropy (PMA) coefficient, magnetic domain structures, and magnetization dynamics of Pt(5 nm)/[Co(t_Co nm)/Ni(t_Ni nm)]5/Pt(1 nm) multilayers by combining the four standard magnetic characterization techniques. The magnetic-related hysteresis loops obtained from the field-dependent magnetization M and anomal… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.09366v1-abstract-full').style.display = 'inline'; document.getElementById('2304.09366v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.09366v1-abstract-full" style="display: none;"> We systematically investigated the Ni and Co thickness-dependent perpendicular magnetic anisotropy (PMA) coefficient, magnetic domain structures, and magnetization dynamics of Pt(5 nm)/[Co(t_Co nm)/Ni(t_Ni nm)]5/Pt(1 nm) multilayers by combining the four standard magnetic characterization techniques. The magnetic-related hysteresis loops obtained from the field-dependent magnetization M and anomalous Hall resistivity (AHR) \r{ho}_xy found that the two serial multilayers with t_Co = 0.2 and 0.3 nm have the optimum PMA coefficient K_U well as the highest coercivity H_C at the Ni thickness t_Ni = 0.6 nm. Additionally, the magnetic domain structures obtained by Magneto-optic Kerr effect (MOKE) microscopy also significantly depend on the thickness and K_U of the films. Furthermore, the thickness-dependent linewidth of ferromagnetic resonance is inversely proportional to K_U and H_C, indicating that inhomogeneous magnetic properties dominate the linewidth. However, the intrinsic Gilbert damping constant determined by a linear fitting of frequency-dependent linewidth does not depend on Ni thickness and K_U. Our results could help promote the PMA [Co/Ni] multilayer applications in various spintronic and spin-orbitronic devices. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.09366v1-abstract-full').style.display = 'none'; document.getElementById('2304.09366v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Chinese Phys. B 32 (2023) 017503 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.08858">arXiv:2304.08858</a> <span> [<a href="https://arxiv.org/pdf/2304.08858">pdf</a>, <a href="https://arxiv.org/ps/2304.08858">ps</a>, <a href="https://arxiv.org/format/2304.08858">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/10.1063/5.0138493">10.1063/5.0138493 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Efficient characteristics of exchange coupling and spin-flop transition in Py/Gd bilayer using anisotropic magnetoresistance </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaiyuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Zhan%2C+X">Xiang Zhan</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+Z">Zishuang Li</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+H">Haotian Li</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+C">Chunjie Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+L">Lina Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+R">Ronghua 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="2304.08858v1-abstract-short" style="display: inline;"> The interlayer antiferromagnetic coupling rare-earth/transition-metal bilayer ferrimagnet systems have attracted much attention because they present variously unusual temperature-and field-dependent nontrivial magnetic states and dynamics. These properties and the implementation of their applications in spintronics highly depend on the significant temperature dependence of the magnetic exchange st… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.08858v1-abstract-full').style.display = 'inline'; document.getElementById('2304.08858v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.08858v1-abstract-full" style="display: none;"> The interlayer antiferromagnetic coupling rare-earth/transition-metal bilayer ferrimagnet systems have attracted much attention because they present variously unusual temperature-and field-dependent nontrivial magnetic states and dynamics. These properties and the implementation of their applications in spintronics highly depend on the significant temperature dependence of the magnetic exchange stiffness constant A. Here, we quantitatively determine the temperature dependence of magnetic exchange stiffness A_{Py-Gd} and A_{Gd} in the artificially layered ferrimagnet consisting of a Py/Gd bilayer, using a measurement of anisotropic magnetoresistance (AMR) of the bilayer thin film at different temperatures and magnetic fields. The obtained temperature dependence of A_{Py-Gd} and A_{Gd} exhibit a scaling power law with the magnetization of Gd. The critical field of spin-flop transition and its temperature dependence can also be directly obtained by this method. Additionally, the experimental results are well reproduced by micromagnetic simulations with the obtained parameters A_{Py-Gd} and A_{Gd}, which further confirms the reliability of this easily accessible technique. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.08858v1-abstract-full').style.display = 'none'; document.getElementById('2304.08858v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Applied Physics Letters 122 (2023) 102403 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.05026">arXiv:2304.05026</a> <span> [<a href="https://arxiv.org/pdf/2304.05026">pdf</a>, <a href="https://arxiv.org/format/2304.05026">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"> Excitation and voltage-gated modulation of single-mode dynamics in a planar nano-gap spin Hall nano-oscillator </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Chen%2C+L">Lina Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+Y">Yu Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+Z">Zhenyu Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Kaiyuan Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Tao%2C+Z">Zui Tao</a>, <a href="/search/cond-mat?searchtype=author&query=Pu%2C+Y">Yong Pu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+T">Tiejun Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Liu%2C+R">Ronghua 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="2304.05026v1-abstract-short" style="display: inline;"> We experimentally study the dynamical modes excited by current-induced spin-orbit torque and its electrostatic gating effect in a 3-terminal planar nano-gap spin Hall nano-oscillator (SHNO) with a moderate interfacial perpendicular magnetic anisotropy (IPMA). Both quasilinear propagating spin-wave and localized "bullet" modes are achieved and controlled by varying the applied in-plane magnetic fie… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.05026v1-abstract-full').style.display = 'inline'; document.getElementById('2304.05026v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.05026v1-abstract-full" style="display: none;"> We experimentally study the dynamical modes excited by current-induced spin-orbit torque and its electrostatic gating effect in a 3-terminal planar nano-gap spin Hall nano-oscillator (SHNO) with a moderate interfacial perpendicular magnetic anisotropy (IPMA). Both quasilinear propagating spin-wave and localized "bullet" modes are achieved and controlled by varying the applied in-plane magnetic field and driving current. The minimum linewidth shows a linear dependence on the actual temperature of the active area, confirming single-mode dynamics based on the nonlinear theory of spin-torque nano-oscillation with a single mode. The observed electrostatic gating tuning oscillation frequency arises from voltage-controlled magnetic anisotropy and threshold current of SHNO via modification of the nonlinear damping and/or the interfacial spin-orbit coupling of the magnetic multilayer. In contrast to previously observed two-mode coexistence degrading the spectral purity in Py/Pt-based SHNOs with a negligible IPMA, a single coherent spin-wave mode with a low driven current can be achieved by selecting the ferromagnet layer with a suitable IPMA because the nonlinear mode coupling can be diminished by bringing in the PMA field to compensate the easy-plane shape anisotropy. Moreover, the simulations demonstrate that the experimentally observed current and gate-voltage modulation of auto-oscillation modes are also closely associated with the nonlinear damping and mode coupling, which are determined by the ellipticity of magnetization precession. The demonstrated nonlinear mode coupling mechanism and electrical control approach of spin-wave modes could provide the clue to facilitate the implementation of the mutual synchronization map for neuromorphic computing applications in SHNO array networks. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.05026v1-abstract-full').style.display = 'none'; document.getElementById('2304.05026v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </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, 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/2304.02115">arXiv:2304.02115</a> <span> [<a href="https://arxiv.org/pdf/2304.02115">pdf</a>, <a href="https://arxiv.org/format/2304.02115">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="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.132.066004">10.1103/PhysRevLett.132.066004 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Collective nature of orbital excitations in layered cuprates in the absence of apical oxygens </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Martinelli%2C+L">Leonardo Martinelli</a>, <a href="/search/cond-mat?searchtype=author&query=Wohlfeld%2C+K">Krzysztof Wohlfeld</a>, <a href="/search/cond-mat?searchtype=author&query=Pelliciari%2C+J">Jonathan Pelliciari</a>, <a href="/search/cond-mat?searchtype=author&query=Arpaia%2C+R">Riccardo Arpaia</a>, <a href="/search/cond-mat?searchtype=author&query=Brookes%2C+N+B">Nicholas B. Brookes</a>, <a href="/search/cond-mat?searchtype=author&query=Di+Castro%2C+D">Daniele Di Castro</a>, <a href="/search/cond-mat?searchtype=author&query=Fernandez%2C+M+G">Mirian G. Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Kang%2C+M">Mingu Kang</a>, <a href="/search/cond-mat?searchtype=author&query=Krockenberger%2C+Y">Yoshiharu Krockenberger</a>, <a href="/search/cond-mat?searchtype=author&query=Kummer%2C+K">Kurt Kummer</a>, <a href="/search/cond-mat?searchtype=author&query=McNally%2C+D+E">Daniel E. McNally</a>, <a href="/search/cond-mat?searchtype=author&query=Paris%2C+E">Eugenio Paris</a>, <a href="/search/cond-mat?searchtype=author&query=Schmitt%2C+T">Thorsten Schmitt</a>, <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+H">Hideki Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Walters%2C+A">Andrew Walters</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Braicovich%2C+L">Lucio Braicovich</a>, <a href="/search/cond-mat?searchtype=author&query=Comin%2C+R">Riccardo Comin</a>, <a href="/search/cond-mat?searchtype=author&query=Sala%2C+M+M">Marco Moretti Sala</a>, <a href="/search/cond-mat?searchtype=author&query=Devereaux%2C+T+P">Thomas P. Devereaux</a>, <a href="/search/cond-mat?searchtype=author&query=Daghofer%2C+M">Maria Daghofer</a>, <a href="/search/cond-mat?searchtype=author&query=Ghiringhelli%2C+G">Giacomo Ghiringhelli</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="2304.02115v3-abstract-short" style="display: inline;"> We have investigated the 3d orbital excitations in CaCuO2 (CCO), Nd2CuO4 (NCO), and La2CuO4 (LCO) using high-resolution resonant inelastic x-ray scattering. In LCO they behave as well-localized excitations, similarly to several other cuprates. On the contrary, in CCO and NCO the dxy orbital clearly disperse, pointing to a collective character of this excitation (orbiton) in compounds without apica… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.02115v3-abstract-full').style.display = 'inline'; document.getElementById('2304.02115v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.02115v3-abstract-full" style="display: none;"> We have investigated the 3d orbital excitations in CaCuO2 (CCO), Nd2CuO4 (NCO), and La2CuO4 (LCO) using high-resolution resonant inelastic x-ray scattering. In LCO they behave as well-localized excitations, similarly to several other cuprates. On the contrary, in CCO and NCO the dxy orbital clearly disperse, pointing to a collective character of this excitation (orbiton) in compounds without apical oxygen. We ascribe the origin of the dispersion as stemming from a substantial next-nearest-neighbor (NNN) orbital superexchange. Such an exchange leads to the liberation of orbiton from its coupling to magnons, which is associated with the orbiton hopping between nearest neighbor copper sites. We show that the exceptionally large NNN orbital superexchange can be traced back to the absence of apical oxygens suppressing the charge transfer energy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.02115v3-abstract-full').style.display = 'none'; document.getElementById('2304.02115v3-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 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 132, 066004 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.03925">arXiv:2302.03925</a> <span> [<a href="https://arxiv.org/pdf/2302.03925">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-023-06016-5">10.1038/s41586-023-06016-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Chiral phonons probed by X rays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Ueda%2C+H">Hiroki Ueda</a>, <a href="/search/cond-mat?searchtype=author&query=Garc%C3%ADa-Fern%C3%A1ndez%2C+M">Mirian Garc铆a-Fern谩ndez</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Romao%2C+C+P">Carl P. Romao</a>, <a href="/search/cond-mat?searchtype=author&query=Brink%2C+J+v+d">Jeroen van den Brink</a>, <a href="/search/cond-mat?searchtype=author&query=Spaldin%2C+N+A">Nicola A. Spaldin</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Staub%2C+U">Urs Staub</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.03925v1-abstract-short" style="display: inline;"> The concept of chirality is of great relevance in nature, from chiral molecules such as sugar to parity transformations in particle physics. In condensed matter physics, recent studies have demonstrated chiral fermions and their relevance in emergent phenomena closely related to topology. The experimental verification of chiral phonons (bosons) remains challenging, however, despite their expected… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.03925v1-abstract-full').style.display = 'inline'; document.getElementById('2302.03925v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.03925v1-abstract-full" style="display: none;"> The concept of chirality is of great relevance in nature, from chiral molecules such as sugar to parity transformations in particle physics. In condensed matter physics, recent studies have demonstrated chiral fermions and their relevance in emergent phenomena closely related to topology. The experimental verification of chiral phonons (bosons) remains challenging, however, despite their expected strong impact on fundamental physical properties. Here we show experimental proof of chiral phonons using resonant inelastic X-ray scattering with circularly polarized X rays. Using the prototypical chiral material, quartz, we demonstrate that circularly polarized X rays, which are intrinsically chiral, couple to chiral phonons at specific positions in reciprocal space, allowing us to determine the chiral dispersion of the lattice modes. Our experimental proof of chiral phonons demonstrates a new degree of freedom in condensed matter that is both of fundamental importance and opens the door to exploration of novel emergent phenomena based on chiral bosons <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.03925v1-abstract-full').style.display = 'none'; document.getElementById('2302.03925v1-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">originally announced</span> February 2023. </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</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 618 946 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.08415">arXiv:2301.08415</a> <span> [<a href="https://arxiv.org/pdf/2301.08415">pdf</a>, <a href="https://arxiv.org/format/2301.08415">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="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/sciadv.adg3710">10.1126/sciadv.adg3710 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Low-energy quasi-circular electron correlations with charge order wavelength in $\textrm{Bi}_2\textrm{Sr}_2\textrm{Ca}\textrm{Cu}_2\textrm{O}_{8+未}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Scott%2C+K">K. Scott</a>, <a href="/search/cond-mat?searchtype=author&query=Kisiel%2C+E">E. Kisiel</a>, <a href="/search/cond-mat?searchtype=author&query=Boyle%2C+T+J">T. J. Boyle</a>, <a href="/search/cond-mat?searchtype=author&query=Basak%2C+R">R. Basak</a>, <a href="/search/cond-mat?searchtype=author&query=Jargot%2C+G">G. Jargot</a>, <a href="/search/cond-mat?searchtype=author&query=Das%2C+S">S. Das</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">J. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Pelliciari%2C+J">J. Pelliciari</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+J">J. Li</a>, <a href="/search/cond-mat?searchtype=author&query=Chuang%2C+Y+D">Y. D. Chuang</a>, <a href="/search/cond-mat?searchtype=author&query=Zhong%2C+R+D">R. D. Zhong</a>, <a href="/search/cond-mat?searchtype=author&query=Schneeloch%2C+J+A">J. A. Schneeloch</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+G+D">G. D. Gu</a>, <a href="/search/cond-mat?searchtype=author&query=L%C3%A9gar%C3%A9%2C+F">F. L茅gar茅</a>, <a href="/search/cond-mat?searchtype=author&query=Kemper%2C+A+F">A. F. Kemper</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Bisogni%2C+V">V. Bisogni</a>, <a href="/search/cond-mat?searchtype=author&query=Blanco-Canosa%2C+S">S. Blanco-Canosa</a>, <a href="/search/cond-mat?searchtype=author&query=Frano%2C+A">A. Frano</a>, <a href="/search/cond-mat?searchtype=author&query=Boschini%2C+F">F. Boschini</a>, <a href="/search/cond-mat?searchtype=author&query=Neto%2C+E+H+d+S">E. H. da Silva Neto</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="2301.08415v1-abstract-short" style="display: inline;"> In the study of dynamic charge order correlations in the cuprates, most high energy-resolution resonant inelastic x-ray scattering (RIXS) measurements have focused on momenta along the high-symmetry directions of the copper oxide plane. However, electron scattering along other in-plane directions should not be neglected as they may contain information relevant, for example, to the origin of charge… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.08415v1-abstract-full').style.display = 'inline'; document.getElementById('2301.08415v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.08415v1-abstract-full" style="display: none;"> In the study of dynamic charge order correlations in the cuprates, most high energy-resolution resonant inelastic x-ray scattering (RIXS) measurements have focused on momenta along the high-symmetry directions of the copper oxide plane. However, electron scattering along other in-plane directions should not be neglected as they may contain information relevant, for example, to the origin of charge order correlations or to our understanding of the isotropic scattering responsible for strange metal behavior in cuprates. We report high-resolution resonant inelastic x-ray scattering (RIXS) experiments that reveal the presence of dynamic electron correlations over the $q_x$-$q_y$ scattering plane in underdoped $\textrm{Bi}_2\textrm{Sr}_2\textrm{Ca}\textrm{Cu}_2\textrm{O}_{8+未}$ with $T_c=54$ K. We use the softening of the RIXS-measured bond stretching phonon line as a marker for the presence of charge-order-related dynamic electron correlations. The experiments show that these dynamic correlations exist at energies below approximately $70$ meV and are centered around a quasi-circular manifold in the $q_x$-$q_y$ scattering plane with radius equal to the magnitude of the charge order wave vector, $q_{CO}$. We also demonstrate how this phonon-tracking procedure provides the necessary experimental precision to rule out fluctuations of short-range directional charge order (i.e. centered around $[q_x=\pm q_{CO}, q_y=0]$ and $[q_x=0, q_y=\pm q_{CO}]$) as the origin of the observed correlations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.08415v1-abstract-full').style.display = 'none'; document.getElementById('2301.08415v1-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted and under review</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Science Advances 9, eadg3710 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2301.07637">arXiv:2301.07637</a> <span> [<a href="https://arxiv.org/pdf/2301.07637">pdf</a>, <a href="https://arxiv.org/format/2301.07637">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="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1002/adma.202307515">10.1002/adma.202307515 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Stripe Symmetry of Short-range Charge Density Waves in Cuprate Superconductors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">Jaewon Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Li%2C+J">Jiemin Li</a>, <a href="/search/cond-mat?searchtype=author&query=Nag%2C+A">Abhishek Nag</a>, <a href="/search/cond-mat?searchtype=author&query=Pelliciari%2C+J">Jonathan Pelliciari</a>, <a href="/search/cond-mat?searchtype=author&query=Robarts%2C+H">Hannah Robarts</a>, <a href="/search/cond-mat?searchtype=author&query=Tam%2C+C+C">Charles C. Tam</a>, <a href="/search/cond-mat?searchtype=author&query=Walters%2C+A">Andrew Walters</a>, <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">Stefano Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Garc%C3%ADa-Fern%C3%A1ndez%2C+M">Mirian Garc铆a-Fern谩ndez</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+D">Dongjoon Song</a>, <a href="/search/cond-mat?searchtype=author&query=Eisaki%2C+H">Hiroshi Eisaki</a>, <a href="/search/cond-mat?searchtype=author&query=Johnston%2C+S">Steven Johnston</a>, <a href="/search/cond-mat?searchtype=author&query=Comin%2C+R">Riccardo Comin</a>, <a href="/search/cond-mat?searchtype=author&query=Ding%2C+H">Hong Ding</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K">Ke-Jin Zhou</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2301.07637v1-abstract-short" style="display: inline;"> The omnipresence of charge density waves (CDWs) across almost all cuprate families underpins a common organizing principle. However, a longstanding debate of whether its spatial symmetry is stripe or checkerboard remains unresolved. While CDWs in lanthanum- and yttrium-based cuprates possess a stripe symmetry, distinguishing these two scenarios has been challenging for the short-range CDW in bismu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.07637v1-abstract-full').style.display = 'inline'; document.getElementById('2301.07637v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2301.07637v1-abstract-full" style="display: none;"> The omnipresence of charge density waves (CDWs) across almost all cuprate families underpins a common organizing principle. However, a longstanding debate of whether its spatial symmetry is stripe or checkerboard remains unresolved. While CDWs in lanthanum- and yttrium-based cuprates possess a stripe symmetry, distinguishing these two scenarios has been challenging for the short-range CDW in bismuth-based cuprates. Here, we employed high-resolution resonant inelastic x-ray scattering to uncover the spatial symmetry of the CDW in Bi$_2$Sr$_{2-x}$La$_{x}$CuO$_{6+未}$. Across a wide range of doping and temperature, anisotropic CDW peaks with elliptical shapes were found in reciprocal space. Based on Fourier transform analysis of real-space models, we interpret the results as evidence of unidirectional charge stripes, hosted by mutually 90$^\circ$-rotated anisotropic domains. Our work paves the way for a unified symmetry and microscopic description of CDW order in cuprates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2301.07637v1-abstract-full').style.display = 'none'; document.getElementById('2301.07637v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 3 figures and Supplementary Information; Under peer review</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Advanced Materials 36, 2307515 (2024) </p> </li> </ol> <nav class="pagination is-small is-centered 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