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</div> <div class="control"> <button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2502.15238">arXiv:2502.15238</a> <span> [<a href="https://arxiv.org/pdf/2502.15238">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> </div> <p class="title is-5 mathjax"> Mass enhancement and metal-nonmetal transition driven by d-f hybridization in perovskites La1-xPrxCuO3 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+H">H. Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Ito%2C+M">M. Ito</a>, <a href="/search/cond-mat?searchtype=author&query=Fujioka%2C+J">J. Fujioka</a>, <a href="/search/cond-mat?searchtype=author&query=Ochi%2C+M">M. Ochi</a>, <a href="/search/cond-mat?searchtype=author&query=Sakai%2C+S">S. Sakai</a>, <a href="/search/cond-mat?searchtype=author&query=Arita%2C+R">R. Arita</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">H. Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">S. Ishiwata</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="2502.15238v1-abstract-short" style="display: inline;"> We report the large electron-mass enhancement and the metal to nonmetal transition upon the Pr doping in perovskite-type La1-xPrxCuO3. With increasing the Pr content x around 0.6, the LaCuO3-type three-dimensional structure with trivalent Cu ions changes to the quasi-one-dimensional structure with nearly divalent Cu ions, which accompanies significant changes in the electronic properties. Based on… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.15238v1-abstract-full').style.display = 'inline'; document.getElementById('2502.15238v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2502.15238v1-abstract-full" style="display: none;"> We report the large electron-mass enhancement and the metal to nonmetal transition upon the Pr doping in perovskite-type La1-xPrxCuO3. With increasing the Pr content x around 0.6, the LaCuO3-type three-dimensional structure with trivalent Cu ions changes to the quasi-one-dimensional structure with nearly divalent Cu ions, which accompanies significant changes in the electronic properties. Based on the resistivity, optical conductivity, specific heat measurements and the first-principles calculations, we discuss the formation of a nearly localized nonmetallic state stabilized by the hybridization between Cu 3d, O 2p, and Pr 4f orbitals in the quasi-one-dimensional lattice. The present perovskite-type cuprates offer a unique opportunity to explore novel quantum phases of correlated electrons in low-dimensional lattice, where the spin/charge/orbital degrees of freedom of A- and B-site ions are entangled. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2502.15238v1-abstract-full').style.display = 'none'; document.getElementById('2502.15238v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 February, 2025; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2025. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">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/2403.05082">arXiv:2403.05082</a> <span> [<a href="https://arxiv.org/pdf/2403.05082">pdf</a>, <a href="https://arxiv.org/format/2403.05082">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/s41535-024-00654-2">10.1038/s41535-024-00654-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Lattice-commensurate skyrmion texture in a centrosymmetric breathing kagome magnet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hirschberger%2C+M">Max Hirschberger</a>, <a href="/search/cond-mat?searchtype=author&query=Szigeti%2C+B+G">Bertalan G. Szigeti</a>, <a href="/search/cond-mat?searchtype=author&query=Hemmida%2C+M">Mamoun Hemmida</a>, <a href="/search/cond-mat?searchtype=author&query=Hirschmann%2C+M+M">Moritz M. Hirschmann</a>, <a href="/search/cond-mat?searchtype=author&query=Esser%2C+S">Sebastian Esser</a>, <a href="/search/cond-mat?searchtype=author&query=Ohsumi%2C+H">Hiroyuki Ohsumi</a>, <a href="/search/cond-mat?searchtype=author&query=Tanaka%2C+Y">Yoshikazu Tanaka</a>, <a href="/search/cond-mat?searchtype=author&query=Spitz%2C+L">Leonie Spitz</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+S">Shang Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Kolincio%2C+K+K">Kamil K. Kolincio</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Forr%C3%B3%2C+L">L谩szl贸 Forr贸</a>, <a href="/search/cond-mat?searchtype=author&query=von+Nidda%2C+H+K">Hans-Albrecht Krug von Nidda</a>, <a href="/search/cond-mat?searchtype=author&query=K%C3%A9zsm%C3%A1rki%2C+I">Istv谩n K茅zsm谩rki</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Yoshinori Tokura</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="2403.05082v1-abstract-short" style="display: inline;"> Skyrmion lattices (SkL) in centrosymmetric materials typically have a magnetic period on the nanometer-scale, so that the coupling between magnetic superstructures and the underlying crystal lattice cannot be neglected. Here, we reveal the commensurate locking of a SkL to the atomic lattice in Gd$_3$Ru$_4$Al$_{12}$ via high-resolution resonant elastic x-ray scattering (REXS). Weak easy-plane magne… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.05082v1-abstract-full').style.display = 'inline'; document.getElementById('2403.05082v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2403.05082v1-abstract-full" style="display: none;"> Skyrmion lattices (SkL) in centrosymmetric materials typically have a magnetic period on the nanometer-scale, so that the coupling between magnetic superstructures and the underlying crystal lattice cannot be neglected. Here, we reveal the commensurate locking of a SkL to the atomic lattice in Gd$_3$Ru$_4$Al$_{12}$ via high-resolution resonant elastic x-ray scattering (REXS). Weak easy-plane magnetic anisotropy, demonstrated here by a combination of ferromagnetic resonance and REXS, penalizes placing a skyrmion core on a site of the atomic lattice. Under these conditions, a commensurate SkL, locked to the crystal lattice, is stable at finite temperatures -- but gives way to a competing incommensurate ground state upon cooling. We discuss the role of Umklapp-terms in the Hamiltonian for the formation of this lattice-locked state, its magnetic space group, the role of slight discommensurations, or (line) defects in the magnetic texture, and contrast our findings with the case of SkLs in noncentrosymmetric material platforms. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2403.05082v1-abstract-full').style.display = 'none'; document.getElementById('2403.05082v1-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 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">17 pages, 4 figures, additional SI included (19 pages, 11 figures, 1 table)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> npj Quantum Mater. 9, 45 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.13903">arXiv:2211.13903</a> <span> [<a href="https://arxiv.org/pdf/2211.13903">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="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/10.1063/5.0101473">10.1063/5.0101473 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Possible helimagnetic order in Co4+-containing perovskites Sr1-xCaxCoO3 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+H">Hidefumi Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Onose%2C+M">Masaho Onose</a>, <a href="/search/cond-mat?searchtype=author&query=Kobayashi%2C+Y">Yasuhito Kobayashi</a>, <a href="/search/cond-mat?searchtype=author&query=Osaka%2C+T">Takahiro Osaka</a>, <a href="/search/cond-mat?searchtype=author&query=Maeda%2C+S">Soushi Maeda</a>, <a href="/search/cond-mat?searchtype=author&query=Miyake%2C+A">Atsushi Miyake</a>, <a href="/search/cond-mat?searchtype=author&query=Tokunaga%2C+M">Masashi Tokunaga</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">Shintaro Ishiwata</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2211.13903v1-abstract-short" style="display: inline;"> We systematically synthesized perovskite-type oxides Sr1-xCaxCoO3 containing unusually high valence Co4+ ions by a high pressure technique, and investigated the effect of systematic lattice change on the magnetic and electronic properties. As the Ca content x exceeds about 0.6, the structure changes from cubic to orthorhombic, which is supported by the first-principles calculations of enthalpy. Up… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.13903v1-abstract-full').style.display = 'inline'; document.getElementById('2211.13903v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.13903v1-abstract-full" style="display: none;"> We systematically synthesized perovskite-type oxides Sr1-xCaxCoO3 containing unusually high valence Co4+ ions by a high pressure technique, and investigated the effect of systematic lattice change on the magnetic and electronic properties. As the Ca content x exceeds about 0.6, the structure changes from cubic to orthorhombic, which is supported by the first-principles calculations of enthalpy. Upon the orthorhombic distortion, the ground state remains to be apparently ferromagnetic with a slight drop of the Curie temperature. Importantly, the compounds with x larger than 0.8 show antiferromagnetic behavior with positive Weiss temperatures and nonlinear magnetization curves at lowest temperature, implying that the ground state is noncollinear antiferromagnetic or helimagnetic. Considering the incoherent metallic behavior and the suppression of the electronic specific heat at high x region, the possible emergence of a helimagnetic state in Sr1-xCaxCoO3 is discussed in terms of the band-width narrowing and the double-exchange mechanism with the negative charge transfer energy as well as the spin frustration owing to the next-nearest neighbor interaction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.13903v1-abstract-full').style.display = 'none'; document.getElementById('2211.13903v1-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 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </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, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> APL Materials 10, 111116 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.07310">arXiv:2209.07310</a> <span> [<a href="https://arxiv.org/pdf/2209.07310">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.6.094401">10.1103/PhysRevMaterials.6.094401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin-charge coupling and decoupling in perovskite-type iron oxides (Sr$_{1-x}$Ba$_x$)$_{2/3}$La$_{1/3}$FeO$_3$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Onose%2C+M">Masaho Onose</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+H">Hidefumi Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Saito%2C+T">Takashi Saito</a>, <a href="/search/cond-mat?searchtype=author&query=Kamiyama%2C+T">Takashi Kamiyama</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+R">Ryunosuke Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Wadati%2C+H">Hiroki Wadati</a>, <a href="/search/cond-mat?searchtype=author&query=Kitao%2C+S">Shinji Kitao</a>, <a href="/search/cond-mat?searchtype=author&query=Seto%2C+M">Makoto Seto</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sato%2C+T">Takuro Sato</a>, <a href="/search/cond-mat?searchtype=author&query=Kagawa%2C+F">Fumitaka Kagawa</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">Shintaro Ishiwata</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="2209.07310v1-abstract-short" style="display: inline;"> The perovskite-type iron oxide Sr$_{2/3}$La$_{1/3}$FeO$_3$ is known to show characteristic spin-charge ordering (SCO), where sixfold collinear spin ordering and threefold charge ordering are coupled with each other. Here, we report the discovery of a spin-charge decoupling and an antiferromagnetic (AFM) state competing with the SCO phase in perovskites (Sr$_{1-x}$Ba$_x$)$_{2/3}$La$_{1/3}$FeO$_3$.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.07310v1-abstract-full').style.display = 'inline'; document.getElementById('2209.07310v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.07310v1-abstract-full" style="display: none;"> The perovskite-type iron oxide Sr$_{2/3}$La$_{1/3}$FeO$_3$ is known to show characteristic spin-charge ordering (SCO), where sixfold collinear spin ordering and threefold charge ordering are coupled with each other. Here, we report the discovery of a spin-charge decoupling and an antiferromagnetic (AFM) state competing with the SCO phase in perovskites (Sr$_{1-x}$Ba$_x$)$_{2/3}$La$_{1/3}$FeO$_3$. By comprehensive measurements including neutron diffraction, M$枚$ssbauer spectroscopy, and x-ray absorption spectroscopy, we found that the isovalent Ba$^{2+}$ substitution systematically reduces the critical temperature of the SCO phase and additionally yields the spin-charge decoupling in $x$ > 0.75. Whereas the ground state remains in the SCO phase in the whole $x$ region, an unexpected G-type AFM phase with incoherent charge ordering or charge fluctuation appears as the high-temperature phase in the range of $x$ > 0.75. Reflecting the competing nature between them, the G-type AFM phase partially exists as a metastable state in the SCO phase at low temperatures. We discuss the origin of the spin-charge decoupling and the emergence of the G-type AFM phase with charge fluctuation in terms of the bandwidth reduction by the Ba substitution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.07310v1-abstract-full').style.display = 'none'; document.getElementById('2209.07310v1-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 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 6, 094401 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.04577">arXiv:2206.04577</a> <span> [<a href="https://arxiv.org/pdf/2206.04577">pdf</a>, <a href="https://arxiv.org/format/2206.04577">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.107.L121112">10.1103/PhysRevB.107.L121112 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Field-tunable Weyl points and large anomalous Hall effects in degenerate magnetic semiconductor EuMg$_2$Bi$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kondo%2C+M">M. Kondo</a>, <a href="/search/cond-mat?searchtype=author&query=Ochi%2C+M">M. Ochi</a>, <a href="/search/cond-mat?searchtype=author&query=Kurihara%2C+R">R. Kurihara</a>, <a href="/search/cond-mat?searchtype=author&query=Miyake%2C+A">A. Miyake</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Tokunaga%2C+M">M. Tokunaga</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Kuroki%2C+K">K. Kuroki</a>, <a href="/search/cond-mat?searchtype=author&query=Kida%2C+T">T. Kida</a>, <a href="/search/cond-mat?searchtype=author&query=Hagiwara%2C+M">M. Hagiwara</a>, <a href="/search/cond-mat?searchtype=author&query=Murakawa%2C+H">H. Murakawa</a>, <a href="/search/cond-mat?searchtype=author&query=Hanasaki%2C+N">N. Hanasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sakai%2C+H">H. Sakai</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="2206.04577v1-abstract-short" style="display: inline;"> Magnets, with topologically-nontrivial Dirac/Weyl points, have recently attracted significant attention owing to the unconventional physical properties, such as large anomalous Hall effects. However, they typically have a high carrier density and complicated band structure near the Fermi energy. In this study, we report degenerate magnetic semiconductor EuMg$_2$Bi$_2$, which exhibits a single vall… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.04577v1-abstract-full').style.display = 'inline'; document.getElementById('2206.04577v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.04577v1-abstract-full" style="display: none;"> Magnets, with topologically-nontrivial Dirac/Weyl points, have recently attracted significant attention owing to the unconventional physical properties, such as large anomalous Hall effects. However, they typically have a high carrier density and complicated band structure near the Fermi energy. In this study, we report degenerate magnetic semiconductor EuMg$_2$Bi$_2$, which exhibits a single valley at the $螕$ point, where the field-tunable Weyl points form via the magnetic exchange interaction with the local Eu spins. By the high-field measurements on high-quality single crystals, we observed the quantum oscillations in resistivity, elastic constant, and surface impedance, which enabled us to determine the position of the Fermi energy. In combination with the first-principles calculation, we revealed that the Weyl points are located in the vicinity of the Fermi energy when the Eu spins are fully polarized. Furthermore, we observed large anomalous Hall effect (Hall angle $螛_{\mathrm{AH}}\sim0.07$) in the forced ferromagnetic phase, which is consistent with this field variation of band structure. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.04577v1-abstract-full').style.display = 'none'; document.getElementById('2206.04577v1-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 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 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/2201.06237">arXiv:2201.06237</a> <span> [<a href="https://arxiv.org/pdf/2201.06237">pdf</a>, <a href="https://arxiv.org/format/2201.06237">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1002/advs.202105452">10.1002/advs.202105452 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Zoology of multiple-Q spin textures in a centrosymmetric tetragonal magnet with itinerant electrons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Khanh%2C+N+D">N. D. Khanh</a>, <a href="/search/cond-mat?searchtype=author&query=Nakajima%2C+T">T. Nakajima</a>, <a href="/search/cond-mat?searchtype=author&query=Hayami%2C+S">S. Hayami</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+S">S. Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">H. Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Takagi%2C+R">R. Takagi</a>, <a href="/search/cond-mat?searchtype=author&query=Motome%2C+Y">Y. Motome</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Seki%2C+S">S. Seki</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="2201.06237v1-abstract-short" style="display: inline;"> Magnetic skyrmion is a topologically stable particle-like swirling spin texture potentially suitable for high-density information bit, which was first observed in noncentrosymmetric magnets with Dzyaloshinskii-Moriya interaction. Recently, nanometric skyrmion has also been discovered in centrosymmetric rare-earth compounds, and the identification of their skyrmion formation mechanism and further s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.06237v1-abstract-full').style.display = 'inline'; document.getElementById('2201.06237v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.06237v1-abstract-full" style="display: none;"> Magnetic skyrmion is a topologically stable particle-like swirling spin texture potentially suitable for high-density information bit, which was first observed in noncentrosymmetric magnets with Dzyaloshinskii-Moriya interaction. Recently, nanometric skyrmion has also been discovered in centrosymmetric rare-earth compounds, and the identification of their skyrmion formation mechanism and further search of nontrivial spin textures are highly demanded. Here, we have exhaustively studied magnetic structures in a prototypical skyrmion-hosting centrosymmetric tetragonal magnet GdRu2Si2, by performing the resonant X-ray scattering experiments. We identified a rich variety of double-Q magnetic structures, including the antiferroic order of meron(half-skyrmion)/anti-meronlike textures with fractional local topological charges. The observed intricate magnetic phase diagram has been successfully reproduced by the theoretical framework considering the four-spin interaction mediated by itinerant electrons and magnetic anisotropy. The present results will contribute to the better understanding of the novel skyrmion formation mechanism in this centrosymmetric rare-earth compound, and suggest that itinerant electrons can ubiquitously host a variety of unique multiple-Q spin orders in a simple crystal lattice system. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.06237v1-abstract-full').style.display = 'none'; document.getElementById('2201.06237v1-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted to be published in Advanced Science</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Advanced Science (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.16038">arXiv:2103.16038</a> <span> [<a href="https://arxiv.org/pdf/2103.16038">pdf</a>, <a href="https://arxiv.org/format/2103.16038">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/10.1088/1367-2630/ac5f31">10.1088/1367-2630/ac5f31 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Photoinduced Transient States of Antiferromagnetic Orderings in La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$ and SrFeO${}_{3}$ Thin Films Observed through Time-resolved Resonant Soft X-ray Scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+K">Kohei Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Tsuyama%2C+T">Tomoyuki Tsuyama</a>, <a href="/search/cond-mat?searchtype=author&query=Ito%2C+S">Suguru Ito</a>, <a href="/search/cond-mat?searchtype=author&query=Takubo%2C+K">Kou Takubo</a>, <a href="/search/cond-mat?searchtype=author&query=Matsuda%2C+I">Iwao Matsuda</a>, <a href="/search/cond-mat?searchtype=author&query=Pontius%2C+N">Niko Pontius</a>, <a href="/search/cond-mat?searchtype=author&query=Sch%C3%BC%C3%9Fler-Langeheine%2C+C">Christian Sch眉脽ler-Langeheine</a>, <a href="/search/cond-mat?searchtype=author&query=Minohara%2C+M">Makoto Minohara</a>, <a href="/search/cond-mat?searchtype=author&query=Kumigashira%2C+H">Hiroshi Kumigashira</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Youichi Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Katase%2C+T">Takayoshi Katase</a>, <a href="/search/cond-mat?searchtype=author&query=Kamiya%2C+T">Toshio Kamiya</a>, <a href="/search/cond-mat?searchtype=author&query=Wadati%2C+H">Hiroki Wadati</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="2103.16038v1-abstract-short" style="display: inline;"> The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. In La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$ thin films, commensurate spin ordering is accompanied by charge disproportionation, whereas SrFeO${}_{3}$ thin films show incommensurate helical antiferromagnetic spin ordering due to increased ferromagnetic coupling comp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.16038v1-abstract-full').style.display = 'inline'; document.getElementById('2103.16038v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.16038v1-abstract-full" style="display: none;"> The relationship between the magnetic interaction and photoinduced dynamics in antiferromagnetic perovskites is investigated in this study. In La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$ thin films, commensurate spin ordering is accompanied by charge disproportionation, whereas SrFeO${}_{3}$ thin films show incommensurate helical antiferromagnetic spin ordering due to increased ferromagnetic coupling compared to La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$. To understand the photoinduced spin dynamics in these materials, we investigate the spin ordering through time-resolved resonant soft X-ray scattering. In La${}_{1/3}$Sr${}_{2/3}$FeO${}_{3}$, ultrafast quenching of the magnetic ordering within 130 fs through a nonthermal process is observed, triggered by charge transfer between the Fe atoms. We compare this to the photoinduced dynamics of the helical magnetic ordering of SrFeO${}_{3}$. We find that the change in the magnetic coupling through optically induced charge transfer can offer an even more efficient channel for spin-order manipulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.16038v1-abstract-full').style.display = 'none'; document.getElementById('2103.16038v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.08111">arXiv:2103.08111</a> <span> [<a href="https://arxiv.org/pdf/2103.08111">pdf</a>, <a href="https://arxiv.org/format/2103.08111">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.5.094201">10.1103/PhysRevMaterials.5.094201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Doping-induced topological transition and enhancement of thermopower in the Dirac-semimetal system Cd$_{3-x}$Zn$_x$As$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Fujioka%2C+J">J. Fujioka</a>, <a href="/search/cond-mat?searchtype=author&query=Kriener%2C+M">M. Kriener</a>, <a href="/search/cond-mat?searchtype=author&query=Hashizume%2C+D">D. Hashizume</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+Y">Y. Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</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="2103.08111v1-abstract-short" style="display: inline;"> Cd$_3$As$_2$ is one of the prototypical topological Dirac semimetals. Here, we manipulate the band inversion responsible for the emergence of Dirac nodes by alloying Cd$_3$As$_2$ with topologically trivial Zn$_3$As$_2$. We observe the expected topological phase transition around a Zn concentration of $x\sim 1$ while the carrier density monotonically decreases as $x$ is increased. For larger $x$, t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.08111v1-abstract-full').style.display = 'inline'; document.getElementById('2103.08111v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.08111v1-abstract-full" style="display: none;"> Cd$_3$As$_2$ is one of the prototypical topological Dirac semimetals. Here, we manipulate the band inversion responsible for the emergence of Dirac nodes by alloying Cd$_3$As$_2$ with topologically trivial Zn$_3$As$_2$. We observe the expected topological phase transition around a Zn concentration of $x\sim 1$ while the carrier density monotonically decreases as $x$ is increased. For larger $x$, the thermoelectric figure of merit exhibits comparably large values exceeding 0.3 at room temperature, due to the combined effects of a strong enhancement of the thermopower, an only moderate increase of the resistivity, and a suppression of the thermal conductivity. Complementary quantum-oscillation data and optical-conductivity measurements allow to infer that the enhanced thermoelectric performance is due to a flattening of the band structure in the higher-$x$ region in Cd$_{3-x}$Zn$_x$As$_2$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.08111v1-abstract-full').style.display = 'none'; document.getElementById('2103.08111v1-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 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 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. Materials 5, 094201 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.14966">arXiv:2010.14966</a> <span> [<a href="https://arxiv.org/pdf/2010.14966">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.4.114420">10.1103/PhysRevMaterials.4.114420 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Complete phase diagram of Sr$_{1-x}$La$_x$FeO$_3$ with versatile magnetic and charge ordering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Onose%2C+M">Masaho Onose</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+H">Hidefumi Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">Shintaro Ishiwata</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.14966v1-abstract-short" style="display: inline;"> A detailed electronic phase diagram of perovskite-type oxides Sr$_{1-x}$La$_x$FeO$_3$ $(0\leq x \leq 0.5)$ was established by synchrotron X-ray diffraction, magnetization, and transport measurements for polycrystalline samples synthesized by a high-pressure technique. Among three kinds of helimagnetic phases in SrFeO$_3$ at zero field, two of them showing multiple-${\it q}$ helimagnetic spin textu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.14966v1-abstract-full').style.display = 'inline'; document.getElementById('2010.14966v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.14966v1-abstract-full" style="display: none;"> A detailed electronic phase diagram of perovskite-type oxides Sr$_{1-x}$La$_x$FeO$_3$ $(0\leq x \leq 0.5)$ was established by synchrotron X-ray diffraction, magnetization, and transport measurements for polycrystalline samples synthesized by a high-pressure technique. Among three kinds of helimagnetic phases in SrFeO$_3$ at zero field, two of them showing multiple-${\it q}$ helimagnetic spin textures tend to rapidly disappear in cubic symmetry upon the La substitution with $x$ less than 0.1, which accompanies the loss of metallic nature. On the other hand, the third helimagnetic phase apparently remains robustly in Sr$_{1-x}$La$_x$FeO$_3$ with $x$ higher than 0.1, followed by merging to the spin/charge ordered phase with $x\sim 1/3$. We propose an important role of itinerant ligand holes on the emergence of multiple-${\it q}$ states and a possible link between the third (putative single-${\it q}$) helimagnetic phase in SrFeO$_3$ and the spin/charge ordered phase in Sr$_{2/3}$La$_{1/3}$FeO$_3$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.14966v1-abstract-full').style.display = 'none'; document.getElementById('2010.14966v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 6 figures. Accepted for publication in Physical Review Materials</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 4, 114420 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.06556">arXiv:2010.06556</a> <span> [<a href="https://arxiv.org/pdf/2010.06556">pdf</a>, <a href="https://arxiv.org/format/2010.06556">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.5.015001">10.1103/PhysRevMaterials.5.015001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-pressure synthesis of Ba$_2$RhO$_4$, a rhodate analogue of the layered perovskite Sr-ruthenate </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kurata%2C+I">I. Kurata</a>, <a href="/search/cond-mat?searchtype=author&query=Flores-Livas%2C+J+A">Jos茅 A. Flores-Livas</a>, <a href="/search/cond-mat?searchtype=author&query=Sugimoto%2C+H">H. Sugimoto</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+H">H. Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">H. Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nomoto%2C+T">T. Nomoto</a>, <a href="/search/cond-mat?searchtype=author&query=Arita%2C+R">R. Arita</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">S. Ishiwata</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.06556v1-abstract-short" style="display: inline;"> A new layered perovskite-type oxide Ba$_2$RhO$_4$ was synthesized by a high-pressure technique with the support of convex-hull calculations. The crystal and electronic structure were studied by both experimental and computational tools. Structural refinements for powder x-ray diffraction data showed that Ba$_2$RhO$_4$ crystallizes in a K$_2$NiF$_4$-type structure, isostructural to Sr$_2$RuO$_4$ an… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.06556v1-abstract-full').style.display = 'inline'; document.getElementById('2010.06556v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.06556v1-abstract-full" style="display: none;"> A new layered perovskite-type oxide Ba$_2$RhO$_4$ was synthesized by a high-pressure technique with the support of convex-hull calculations. The crystal and electronic structure were studied by both experimental and computational tools. Structural refinements for powder x-ray diffraction data showed that Ba$_2$RhO$_4$ crystallizes in a K$_2$NiF$_4$-type structure, isostructural to Sr$_2$RuO$_4$ and Ba$_2$IrO$_4$. Magnetic, resistivity, and specific heat measurements for polycrystalline samples of Ba$_2$RhO$_4$ indicate that the system can be characterized as a correlated metal. Despite the close similarity to its Sr$_2$RuO$_4$ counterpart in the electronic specific heat coefficient and the Wilson ratio, Ba$_2$RhO$_4$ shows no signature of superconductivity down to 0.16 K. Whereas the Fermi surface topology has reminiscent pieces of Sr$_2$RuO$_4$, an electron-like e$_g$-($d_{x^2-y^2}$) band descends below the Fermi level, making of this compound unique also as a metallic counterpart of the spin-orbit-coupled Mott insulator Ba$_2$IrO$_4$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.06556v1-abstract-full').style.display = 'none'; document.getElementById('2010.06556v1-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 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 5, 015001 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.16552">arXiv:2006.16552</a> <span> [<a href="https://arxiv.org/pdf/2006.16552">pdf</a>, <a href="https://arxiv.org/ps/2006.16552">ps</a>, <a href="https://arxiv.org/format/2006.16552">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Optics">physics.optics</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevApplied.14.064069">10.1103/PhysRevApplied.14.064069 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Soft X-ray Vortex Beam detected by In-line Holography </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Ishii%2C+Y">Yuta Ishii</a>, <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+K">Kohei Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Yokoyama%2C+Y">Yuichi Yokoyama</a>, <a href="/search/cond-mat?searchtype=author&query=Mizumaki%2C+M">Masaichiro Mizumaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</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="2006.16552v1-abstract-short" style="display: inline;"> We demonstrate the in-line holography for soft x-ray vortex beam having an orbital angular momentum. A hologram is recorded as an interference between a Bragg diffraction wave from a fork grating and a divergence wave generated by a Fresnel zone plate. The obtained images exhibit fork-shaped interference fringes, which confirms the formation of the vortex beam. By analyzing the interference image,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.16552v1-abstract-full').style.display = 'inline'; document.getElementById('2006.16552v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.16552v1-abstract-full" style="display: none;"> We demonstrate the in-line holography for soft x-ray vortex beam having an orbital angular momentum. A hologram is recorded as an interference between a Bragg diffraction wave from a fork grating and a divergence wave generated by a Fresnel zone plate. The obtained images exhibit fork-shaped interference fringes, which confirms the formation of the vortex beam. By analyzing the interference image, we successfully obtained the spiral phase distribution. The results demonstrate that the in-line holography technique is promising for the characterization of topological magnets, such as magnetic skyrmions. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.16552v1-abstract-full').style.display = 'none'; document.getElementById('2006.16552v1-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 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Applied 14, 064069 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.12426">arXiv:2004.12426</a> <span> [<a href="https://arxiv.org/pdf/2004.12426">pdf</a>, <a href="https://arxiv.org/format/2004.12426">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.102.014416">10.1103/PhysRevB.102.014416 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Metastable solitonic states in the strained itinerant helimagnet FeGe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Ukleev%2C+V">Victor Ukleev</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Utesov%2C+O">Oleg Utesov</a>, <a href="/search/cond-mat?searchtype=author&query=Shibata%2C+K">Kiyou Shibata</a>, <a href="/search/cond-mat?searchtype=author&query=Kanazawa%2C+N">Naoya Kanazawa</a>, <a href="/search/cond-mat?searchtype=author&query=Jaouen%2C+N">Nicolas Jaouen</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Yoshinori Tokura</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.12426v2-abstract-short" style="display: inline;"> The tensile strain is a promising tool for creation and manipulation of magnetic solitonic textures in the chiral helimagnets via tunable control of magnetic anisotropy and Dzyaloshinskii-Moriya interaction. Here, by using the in-situ resonant small-angle x-ray scattering we demonstrate that the skyrmion and chiral soliton lattices can be achieved as metastable states in FeGe lamella as distinct s… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.12426v2-abstract-full').style.display = 'inline'; document.getElementById('2004.12426v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.12426v2-abstract-full" style="display: none;"> The tensile strain is a promising tool for creation and manipulation of magnetic solitonic textures in the chiral helimagnets via tunable control of magnetic anisotropy and Dzyaloshinskii-Moriya interaction. Here, by using the in-situ resonant small-angle x-ray scattering we demonstrate that the skyrmion and chiral soliton lattices can be achieved as metastable states in FeGe lamella as distinct states or even simultaneously by combining the tensile strain and magnetic fields in various orientations with respect to the deformation. The small-angle scattering data are discussed in the frame of the analytical model which is sufficient to describe the experimental results for soliton lattice. By using the experimental results and analytical theory, unwinding of the metastable skyrmions in the perpendicular magnetic field as seen by small-angle scattering experiment was analyzed by the micromagnetic simulation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.12426v2-abstract-full').style.display = 'none'; document.getElementById('2004.12426v2-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 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 102, 014416 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.05385">arXiv:2004.05385</a> <span> [<a href="https://arxiv.org/pdf/2004.05385">pdf</a>, <a href="https://arxiv.org/format/2004.05385">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="Other Condensed Matter">cond-mat.other</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.101.220401">10.1103/PhysRevB.101.220401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-field depinned phase and planar Hall effect in skyrmion-host Gd$_2$PdSi$_3$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hirschberger%2C+M">Max Hirschberger</a>, <a href="/search/cond-mat?searchtype=author&query=Nakajima%2C+T">Taro Nakajima</a>, <a href="/search/cond-mat?searchtype=author&query=Kriener%2C+M">Markus Kriener</a>, <a href="/search/cond-mat?searchtype=author&query=Kurumaji%2C+T">Takashi Kurumaji</a>, <a href="/search/cond-mat?searchtype=author&query=Spitz%2C+L">Leonie Spitz</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+S">Shang Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Kikkawa%2C+A">Akiko Kikkawa</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Ohira-Kawamura%2C+S">Seiko Ohira-Kawamura</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+Y">Yasujiro Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Yoshinori Tokura</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.05385v1-abstract-short" style="display: inline;"> For the skyrmion-hosting intermetallic Gd$_2$PdSi$_3$ with centrosymmetric hexagonal lattice and triangular net of rare earth sites, we report a thorough investigation of the magnetic phase diagram. Our work reveals a new magnetic phase with isotropic value of the critical field for all orientations, where the magnetic ordering vector $\mathbf{q}$ is depinned from its preferred directions in the b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.05385v1-abstract-full').style.display = 'inline'; document.getElementById('2004.05385v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.05385v1-abstract-full" style="display: none;"> For the skyrmion-hosting intermetallic Gd$_2$PdSi$_3$ with centrosymmetric hexagonal lattice and triangular net of rare earth sites, we report a thorough investigation of the magnetic phase diagram. Our work reveals a new magnetic phase with isotropic value of the critical field for all orientations, where the magnetic ordering vector $\mathbf{q}$ is depinned from its preferred directions in the basal plane. This is in contrast to the highly anisotropic behavior of the low field phases, such as the skyrmion lattice (SkL), which are easily destroyed by in-plane magnetic field. The bulk nature of the SkL and of other magnetic phases was evidenced by specific-heat measurements. Resistivity anisotropy, likely originating from partial gapping of the density of states along $\mathbf{q}$ in this RKKY magnet, is picked up via the planar Hall effect (PHE). The PHE confirms the single-$\mathbf{q}$ nature of the magnetic order when the field is in the hexagonal plane, and allows to detect the preferred directions of $\mathbf{q}$. For field aligned perpendicular to the basal plane, several scenarios for the depinned phase (DP), such as tilted conical order, are discussed on the basis of the data. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.05385v1-abstract-full').style.display = 'none'; document.getElementById('2004.05385v1-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">27 pages, 12 figures (including SI)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 101, 220401 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.03719">arXiv:2003.03719</a> <span> [<a href="https://arxiv.org/pdf/2003.03719">pdf</a>, <a href="https://arxiv.org/ps/2003.03719">ps</a>, <a href="https://arxiv.org/format/2003.03719">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.101.174411">10.1103/PhysRevB.101.174411 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Field-induced spin reorientation in the antiferromagnetic Dirac material EuMnBi$_2$ revealed by neutron and resonant x-ray diffraction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Masuda%2C+H">H. Masuda</a>, <a href="/search/cond-mat?searchtype=author&query=Sakai%2C+H">H. Sakai</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+H">H. Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+A">A. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Moyoshi%2C+T">T. Moyoshi</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Y. Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">S. Ishiwata</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.03719v1-abstract-short" style="display: inline;"> Field-dependent magnetic structure of a layered Dirac material EuMnBi$_2$ was investigated in detail by the single crystal neutron diffraction and the resonant x-ray magnetic diffraction techniques. On the basis of the reflection conditions in the antiferromagnetic phase at zero field, the Eu moments were found to be ordered ferromagnetically within the $ab$ plane and stacked antiferromagnetically… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.03719v1-abstract-full').style.display = 'inline'; document.getElementById('2003.03719v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.03719v1-abstract-full" style="display: none;"> Field-dependent magnetic structure of a layered Dirac material EuMnBi$_2$ was investigated in detail by the single crystal neutron diffraction and the resonant x-ray magnetic diffraction techniques. On the basis of the reflection conditions in the antiferromagnetic phase at zero field, the Eu moments were found to be ordered ferromagnetically within the $ab$ plane and stacked antiferromagnetically along the $c$ axis in the sequence of up-up-down-down. Upon the spin-flop transition under the magnetic field parallel to the $c$ axis, the Eu moments are reoriented from the $c$ to the $a$ or $b$ directions forming two kinds of spin-flop domains, whereas the antiferromagnetic structure of the Mn sublattice remains intact as revealed by the quantitative analysis of the change in the neutron diffraction intensities. The present study provides a concrete basis to discuss the dominant role of the Eu sublattice on the enhanced two-dimensionality of the Dirac fermion transport in EuMnBi$_2$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.03719v1-abstract-full').style.display = 'none'; document.getElementById('2003.03719v1-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 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">16 pages, 5 figures, accepted in PRB</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.00626">arXiv:2003.00626</a> <span> [<a href="https://arxiv.org/pdf/2003.00626">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41565-020-0684-7">10.1038/s41565-020-0684-7 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Khanh%2C+N+D">N. D. Khanh</a>, <a href="/search/cond-mat?searchtype=author&query=Nakajima%2C+T">T. Nakajima</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+X+Z">X. Z. Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+S">S. Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Shibata%2C+K">K. Shibata</a>, <a href="/search/cond-mat?searchtype=author&query=Hirschberger%2C+M">M. Hirschberger</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">H. Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Peng%2C+L+C">L. C. Peng</a>, <a href="/search/cond-mat?searchtype=author&query=Nakajima%2C+K">K. Nakajima</a>, <a href="/search/cond-mat?searchtype=author&query=Takagi%2C+R">R. Takagi</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a>, <a href="/search/cond-mat?searchtype=author&query=Seki%2C+S">S. Seki</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2003.00626v3-abstract-short" style="display: inline;"> Magnetic skyrmions are topologically stable spin swirls with particle-like character and potentially suitable for the design of high-density information bits. While most known skyrmion systems arise in noncentrosymmetric systems with Dzyaloshinskii-Moriya interaction, also centrosymmetric magnets with a triangular lattice can give rise to skyrmion formation, with geometrically-frustrated lattice b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.00626v3-abstract-full').style.display = 'inline'; document.getElementById('2003.00626v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.00626v3-abstract-full" style="display: none;"> Magnetic skyrmions are topologically stable spin swirls with particle-like character and potentially suitable for the design of high-density information bits. While most known skyrmion systems arise in noncentrosymmetric systems with Dzyaloshinskii-Moriya interaction, also centrosymmetric magnets with a triangular lattice can give rise to skyrmion formation, with geometrically-frustrated lattice being considered essential in this case. Until today, it remains an open question if skyrmions can also exist in the absence of both geometrically-frustrated lattice and inversion symmetry breaking. Here, we discover a square skyrmion lattice state with 1.9 nm diameter skyrmions in the centrosymmetric tetragonal magnet GdRu2Si2 without geometrically-frustrated lattice by means of resonant X-ray scattering and Lorentz transmission electron microscopy experiments. A plausible origin of the observed skyrmion formation is four-spin interactions mediated by itinerant electrons in the presence of easy-axis anisotropy. Our results suggest that rare-earth intermetallics with highly-symmetric crystal lattices may ubiquitously host nanometric skyrmions of exotic origins. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.00626v3-abstract-full').style.display = 'none'; document.getElementById('2003.00626v3-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 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 1 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted to be published in Nature Nanotechnology</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Nanotechnology (Advanced Online Publication) (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2001.07991">arXiv:2001.07991</a> <span> [<a href="https://arxiv.org/pdf/2001.07991">pdf</a>, <a href="https://arxiv.org/ps/2001.07991">ps</a>, <a href="https://arxiv.org/format/2001.07991">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Spintronic superconductor in a bulk layered material with natural spin-valve structure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sakuragi%2C+S">Shunsuke Sakuragi</a>, <a href="/search/cond-mat?searchtype=author&query=Sasaki%2C+S">S. Sasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Akashi%2C+R">R. Akashi</a>, <a href="/search/cond-mat?searchtype=author&query=Sakagami%2C+R">R. Sakagami</a>, <a href="/search/cond-mat?searchtype=author&query=Kuroda%2C+K">K. Kuroda</a>, <a href="/search/cond-mat?searchtype=author&query=Bareille%2C+C">C. Bareille</a>, <a href="/search/cond-mat?searchtype=author&query=Hashimoto%2C+T">T. Hashimoto</a>, <a href="/search/cond-mat?searchtype=author&query=Nagashima%2C+T">T. Nagashima</a>, <a href="/search/cond-mat?searchtype=author&query=Kinoshita%2C+Y">Y. Kinoshita</a>, <a href="/search/cond-mat?searchtype=author&query=Hirata%2C+Y">Y. Hirata</a>, <a href="/search/cond-mat?searchtype=author&query=Shimozawa%2C+M">M. Shimozawa</a>, <a href="/search/cond-mat?searchtype=author&query=Asai%2C+S">S. Asai</a>, <a href="/search/cond-mat?searchtype=author&query=Yajima%2C+T">T. Yajima</a>, <a href="/search/cond-mat?searchtype=author&query=Doi%2C+S">S. Doi</a>, <a href="/search/cond-mat?searchtype=author&query=Tsujimoto%2C+N">N. Tsujimoto</a>, <a href="/search/cond-mat?searchtype=author&query=Kunisada%2C+S">S. Kunisada</a>, <a href="/search/cond-mat?searchtype=author&query=Noguchi%2C+R">R. Noguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Kurokawa%2C+K">K. Kurokawa</a>, <a href="/search/cond-mat?searchtype=author&query=Azuma%2C+N">N. Azuma</a>, <a href="/search/cond-mat?searchtype=author&query=Hirata%2C+K">K. Hirata</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+T+K">T. K. Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Cacho%2C+C">C. Cacho</a>, <a href="/search/cond-mat?searchtype=author&query=Masuda%2C+T">T. Masuda</a> , et al. (7 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="2001.07991v1-abstract-short" style="display: inline;"> Multi-layered materials provide fascinating platforms to realize various functional properties, possibly leading to future electronic devices controlled by external fields. In particular, layered magnets coupled with conducting layers have been extensively studied recently for possible control of their transport properties via the spin structure. Successful control of quantum-transport properties… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.07991v1-abstract-full').style.display = 'inline'; document.getElementById('2001.07991v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2001.07991v1-abstract-full" style="display: none;"> Multi-layered materials provide fascinating platforms to realize various functional properties, possibly leading to future electronic devices controlled by external fields. In particular, layered magnets coupled with conducting layers have been extensively studied recently for possible control of their transport properties via the spin structure. Successful control of quantum-transport properties in the materials with antiferromagnetic (AFM) layers, so-called natural spin-valve structure, has been reported for the Dirac Fermion and topological/axion materials. However, a bulk crystal in which magnetic and superconducting layers are alternately stacked has not been realized until now, and the search for functional properties in it is an interesting yet unexplored field in material science. Here, we discover superconductivity providing such an ideal platform in EuSn2As2 with the van der Waals stacking of magnetic Eu layers and superconducting Sn-As layers, and present the first demonstration of a natural spin-valve effect on the superconducting current. Below the superconducting transition temperature (Tc), the electrical resistivity becomes zero in the in-plane direction. In contrast, it, surprisingly, remains finite down to the lowest temperature in the out-of-plane direction, mostly due to the structure of intrinsic magnetic Josephson junctions in EuSn2As2. The magnetic order of the Eu layers (or natural spin-valve) is observed to be extremely soft, allowing one to easy control of the out-of-plane to in-plane resistivities ratio from 1 to infinity by weak external magnetic fields. The concept of multi-functional materials with stacked magnetic-superconducting layers will open a new pathway to develop novel spintronic devices with magnetically controllable superconductivity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.07991v1-abstract-full').style.display = 'none'; document.getElementById('2001.07991v1-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, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.02363">arXiv:1912.02363</a> <span> [<a href="https://arxiv.org/pdf/1912.02363">pdf</a>, <a href="https://arxiv.org/ps/1912.02363">ps</a>, <a href="https://arxiv.org/format/1912.02363">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.102.054409">10.1103/PhysRevB.102.054409 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Metamagnetic transitions and magnetoelectric responses in a chiral polar helimagnet Ni$_2$InSbO$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Araki%2C+Y">Yusuke Araki</a>, <a href="/search/cond-mat?searchtype=author&query=Sato%2C+T">Tatsuki Sato</a>, <a href="/search/cond-mat?searchtype=author&query=Fujima%2C+Y">Yuri Fujima</a>, <a href="/search/cond-mat?searchtype=author&query=Abe%2C+N">Nobuyuki Abe</a>, <a href="/search/cond-mat?searchtype=author&query=Tokunaga%2C+M">Masashi Tokunaga</a>, <a href="/search/cond-mat?searchtype=author&query=Kimura%2C+S">Shojiro Kimura</a>, <a href="/search/cond-mat?searchtype=author&query=Morikawa%2C+D">Daisuke Morikawa</a>, <a href="/search/cond-mat?searchtype=author&query=Ukleev%2C+V">Victor Ukleev</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Tabata%2C+C">Chihiro Tabata</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Youichi Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Ohishi%2C+K">Kazuki Ohishi</a>, <a href="/search/cond-mat?searchtype=author&query=Tokunaga%2C+Y">Yusuke Tokunaga</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.02363v1-abstract-short" style="display: inline;"> Magnetic-field effect on the magnetic and electric properties in a chiral polar ordered corundum Ni$_2$InSbO$_6$ has been investigated. Single-crystal soft x-ray and neutron diffraction measurements confirm long-wavelength magnetic modulation. The modulation direction tends to align along the magnetic field applied perpendicular to the polar axis, suggesting that the nearly proper-screw type helic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.02363v1-abstract-full').style.display = 'inline'; document.getElementById('1912.02363v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.02363v1-abstract-full" style="display: none;"> Magnetic-field effect on the magnetic and electric properties in a chiral polar ordered corundum Ni$_2$InSbO$_6$ has been investigated. Single-crystal soft x-ray and neutron diffraction measurements confirm long-wavelength magnetic modulation. The modulation direction tends to align along the magnetic field applied perpendicular to the polar axis, suggesting that the nearly proper-screw type helicoid should be formed below 77\,K. The application of a high magnetic field causes a metamagnetic transition. In a magnetic field applied perpendicular to the polar axis, a helix-to-canted antiferromagnetic transition takes place through the intermediate soliton lattice type state. On the other hand, a magnetic field applied along the polar axis induces a first-order metamagnetic transition. These metamagnetic transitions accompany a change in the electric polarization along the polar axis. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.02363v1-abstract-full').style.display = 'none'; document.getElementById('1912.02363v1-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 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 102, 054409 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1910.06027">arXiv:1910.06027</a> <span> [<a href="https://arxiv.org/pdf/1910.06027">pdf</a>, <a href="https://arxiv.org/format/1910.06027">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="Other Condensed Matter">cond-mat.other</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.125.076602">10.1103/PhysRevLett.125.076602 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Topological Nernst effect of the two-dimensional skyrmion lattice </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hirschberger%2C+M">Max Hirschberger</a>, <a href="/search/cond-mat?searchtype=author&query=Spitz%2C+L">Leonie Spitz</a>, <a href="/search/cond-mat?searchtype=author&query=Nomoto%2C+T">Takuya Nomoto</a>, <a href="/search/cond-mat?searchtype=author&query=Kurumaji%2C+T">Takashi Kurumaji</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+S">Shang Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Masell%2C+J">Jan Masell</a>, <a href="/search/cond-mat?searchtype=author&query=Nakajima%2C+T">Taro Nakajima</a>, <a href="/search/cond-mat?searchtype=author&query=Kikkawa%2C+A">Akiko Kikkawa</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+Y">Yasujiro Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Arita%2C+R">Ryotaro Arita</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Yoshinori Tokura</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="1910.06027v2-abstract-short" style="display: inline;"> The topological Hall effect (THE) and its thermoelectric counterpart, the topological Nernst effect (TNE), are hallmarks of the skyrmion lattice phase (SkL). We observed the giant TNE of the SkL in centrosymmetric Gd$_2$PdSi$_3$, comparable in magnitude to the largest anomalous Nernst signals in ferromagnets. Significant enhancement (suppression) of the THE occurs when doping electrons (holes) to… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.06027v2-abstract-full').style.display = 'inline'; document.getElementById('1910.06027v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1910.06027v2-abstract-full" style="display: none;"> The topological Hall effect (THE) and its thermoelectric counterpart, the topological Nernst effect (TNE), are hallmarks of the skyrmion lattice phase (SkL). We observed the giant TNE of the SkL in centrosymmetric Gd$_2$PdSi$_3$, comparable in magnitude to the largest anomalous Nernst signals in ferromagnets. Significant enhancement (suppression) of the THE occurs when doping electrons (holes) to Gd$_2$PdSi$_3$. On the electron-doped side, the topological Hall conductivity approaches the characteristic threshold $\sim 1000\,\left(\mathrm{惟cm}\right)^{-1}$ for the intrinsic regime. We use the filling-controlled samples to confirm Mott's relation between TNE and THE and discuss the importance of Gd-5d orbitals for transport in this compound. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1910.06027v2-abstract-full').style.display = 'none'; document.getElementById('1910.06027v2-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 August, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Main text: 9 pages, 4 figures; with SI: 36 pages, 15 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. 125, 076602 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1909.08179">arXiv:1909.08179</a> <span> [<a href="https://arxiv.org/pdf/1909.08179">pdf</a>, <a href="https://arxiv.org/format/1909.08179">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/10.7566/JPSJ.89.083703">10.7566/JPSJ.89.083703 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Augmented Magnetic Octupole in Kagome Antiferromagnets Detectable via X-ray Magnetic Circular Dichroism </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</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="1909.08179v1-abstract-short" style="display: inline;"> The magneto-optical Kerr effect (MOKE) has recently been discovered in antiferromagnetic Kagome lattice Mn3Sn. Since the compound exhibits a coplanar $120^\circ$ antiferromagnetic (AFM) order, the magnetic moments cancel each other, and the net magnetization is almost zero. However, the MOKE is allowed due to the lack of the time-reversal symmetry (TRS) of the AFM order. X-ray magnetic circular di… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.08179v1-abstract-full').style.display = 'inline'; document.getElementById('1909.08179v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.08179v1-abstract-full" style="display: none;"> The magneto-optical Kerr effect (MOKE) has recently been discovered in antiferromagnetic Kagome lattice Mn3Sn. Since the compound exhibits a coplanar $120^\circ$ antiferromagnetic (AFM) order, the magnetic moments cancel each other, and the net magnetization is almost zero. However, the MOKE is allowed due to the lack of the time-reversal symmetry (TRS) of the AFM order. X-ray magnetic circular dichroism (XMCD) can detect a difference in up and down the spin density of states (DOS), and thus XMCD originating from the spin operator, the so-called Sz term, should be negligibly small as well as the net magnetization. Nonetheless, we show that XMCD originating from the magnetic dipole operator, the so-called Tz term, should remain uncancelled in the AFM with the broken TRS. Moreover, we clarify that there is a strong link between the Tz term and the augmented magnetic octupole (AMO), which suggests that XMCD can be an effective approach for analyzing multipole moments in antiferromagnets. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.08179v1-abstract-full').style.display = 'none'; document.getElementById('1909.08179v1-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 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.00477">arXiv:1904.00477</a> <span> [<a href="https://arxiv.org/pdf/1904.00477">pdf</a>, <a href="https://arxiv.org/format/1904.00477">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> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.99.144408">10.1103/PhysRevB.99.144408 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Element-specific soft X-ray spectroscopy, scattering and imaging studies of skyrmion-hosting compound Co$_8$Zn$_8$Mn$_4$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Ukleev%2C+V">V. Ukleev</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Morikawa%2C+D">D. Morikawa</a>, <a href="/search/cond-mat?searchtype=author&query=Karube%2C+K">K. Karube</a>, <a href="/search/cond-mat?searchtype=author&query=Shibata%2C+K">K. Shibata</a>, <a href="/search/cond-mat?searchtype=author&query=Tokunaga%2C+Y">Y. Tokunaga</a>, <a href="/search/cond-mat?searchtype=author&query=Okamura%2C+Y">Y. Okamura</a>, <a href="/search/cond-mat?searchtype=author&query=Amemiya%2C+K">K. Amemiya</a>, <a href="/search/cond-mat?searchtype=author&query=Valvidares%2C+M">M. Valvidares</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+Y">Y. Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T+-">T. -h. Arima</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="1904.00477v1-abstract-short" style="display: inline;"> A room-temperature skyrmion-hosting compound Co$_8$Zn$_8$Mn$_4$ has been examined by means of soft X-ray absorption spectroscopy, resonant small-angle scattering and extended reference holography. An element-selective study was performed by exciting the $2p$-to-$3d$ transitions near Co and Mn $L_{2,3}$ absorption edges. By utilizing the coherence of soft X-ray beams the element-specific real-space… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.00477v1-abstract-full').style.display = 'inline'; document.getElementById('1904.00477v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.00477v1-abstract-full" style="display: none;"> A room-temperature skyrmion-hosting compound Co$_8$Zn$_8$Mn$_4$ has been examined by means of soft X-ray absorption spectroscopy, resonant small-angle scattering and extended reference holography. An element-selective study was performed by exciting the $2p$-to-$3d$ transitions near Co and Mn $L_{2,3}$ absorption edges. By utilizing the coherence of soft X-ray beams the element-specific real-space distribution of local magnetization at different temperatures has been reconstructed using iterative phase retrieval and holography with extended reference. It was shown that the magnetic moments of Co and Mn are ferromagnetically coupled and exhibit similar magnetic patterns. Both imaging methods provide a real-space resolution of 30 nm and allowed to record a magnetic texture in the temperature range between $T\,=\,20$ K and $T\,=120\,$ K, demonstrating the elongation of the skyrmions along the principal crystallographic axes at low temperatures. Micromagnetic simulations have shown that such deformation is driven by decreasing ratio of symmetric exchange interaction to antisymmetric Dzyaloshinskii-Moriya interaction in the system and effect of the cubic anisotropy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.00477v1-abstract-full').style.display = 'none'; document.getElementById('1904.00477v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 March, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.02553">arXiv:1812.02553</a> <span> [<a href="https://arxiv.org/pdf/1812.02553">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41467-019-13675-4">10.1038/s41467-019-13675-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Skyrmion phase and competing magnetic orders on a breathing kagome lattice </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Hirschberger%2C+M">Max Hirschberger</a>, <a href="/search/cond-mat?searchtype=author&query=Nakajima%2C+T">Taro Nakajima</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+S">Shang Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Peng%2C+L">Licong Peng</a>, <a href="/search/cond-mat?searchtype=author&query=Kikkawa%2C+A">Akiko Kikkawa</a>, <a href="/search/cond-mat?searchtype=author&query=Kurumaji%2C+T">Takashi Kurumaji</a>, <a href="/search/cond-mat?searchtype=author&query=Kriener%2C+M">Markus Kriener</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Ohishi%2C+K">Kazuki Ohishi</a>, <a href="/search/cond-mat?searchtype=author&query=Kakurai%2C+K">Kazuhisa Kakurai</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+Y">Yasujiro Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Yu%2C+X">Xiuzhen Yu</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Yoshinori Tokura</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="1812.02553v2-abstract-short" style="display: inline;"> Magnetic skyrmion textures are realized mainly in non-centrosymmetric, e.g. chiral or polar, magnets. Extending the field to centrosymmetric bulk materials is a rewarding challenge, where the released helicity / vorticity degree of freedom and higher skyrmion density result in intriguing new properties and enhanced functionality. We report here on the experimental observation of a skyrmion lattice… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.02553v2-abstract-full').style.display = 'inline'; document.getElementById('1812.02553v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.02553v2-abstract-full" style="display: none;"> Magnetic skyrmion textures are realized mainly in non-centrosymmetric, e.g. chiral or polar, magnets. Extending the field to centrosymmetric bulk materials is a rewarding challenge, where the released helicity / vorticity degree of freedom and higher skyrmion density result in intriguing new properties and enhanced functionality. We report here on the experimental observation of a skyrmion lattice (SkL) phase with large topological Hall effect and an incommensurate helical pitch as small as 2.8 nm in metallic Gd3Ru4Al12, which materializes a breathing kagom茅 lattice of Gadolinium moments. The magnetic structure of several ordered phases, including the SkL, is determined by resonant x-ray diffraction as well as small angle neutron scattering. The SkL and helical phases are also observed directly using Lorentz transmission electron microscopy. Among several competing phases, the SkL is promoted over a low-temperature transverse conical state by thermal fluctuations in an intermediate range of magnetic fields. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.02553v2-abstract-full').style.display = 'none'; document.getElementById('1812.02553v2-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 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">35 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature Communications 10, 5831 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.10719">arXiv:1805.10719</a> <span> [<a href="https://arxiv.org/pdf/1805.10719">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1126/science.aau0968">10.1126/science.aau0968 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kurumaji%2C+T">Takashi Kurumaji</a>, <a href="/search/cond-mat?searchtype=author&query=Nakajima%2C+T">Taro Nakajima</a>, <a href="/search/cond-mat?searchtype=author&query=Hirschberger%2C+M">Max Hirschberger</a>, <a href="/search/cond-mat?searchtype=author&query=Kikkawa%2C+A">Akiko Kikkawa</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">Hajime Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+Y">Yasujiro Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">Taka-hisa Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Yoshinori Tokura</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="1805.10719v1-abstract-short" style="display: inline;"> Geometrically frustrated magnets provide abundant opportunities for discovering complex spin textures, which sometimes yield unconventional electromagnetic responses in correlated electron systems. It is theoretically predicted that magnetic frustration may also promote a topologically nontrivial spin state, i.e., magnetic skyrmions, which are nanometric spin vortices. Empirically, however, skyrmi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.10719v1-abstract-full').style.display = 'inline'; document.getElementById('1805.10719v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.10719v1-abstract-full" style="display: none;"> Geometrically frustrated magnets provide abundant opportunities for discovering complex spin textures, which sometimes yield unconventional electromagnetic responses in correlated electron systems. It is theoretically predicted that magnetic frustration may also promote a topologically nontrivial spin state, i.e., magnetic skyrmions, which are nanometric spin vortices. Empirically, however, skyrmions are essentially concomitant with noncentrosymmetric lattice structures or interfacial-symmetry-breaking heterostructures. Here, we report the emergence of a Bloch-type skyrmion state in the frustrated centrosymmetric triangular-lattice magnet Gd2PdSi3. We identified the field-induced skyrmion phase via a giant topological Hall response, which is further corroborated by the observation of in-plane spin modulation probed by resonant x-ray scattering. Our results exemplify a new gold mine of magnetic frustration for producing topological spin textures endowed with emergent electrodynamics in centrosymmetric magnets. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.10719v1-abstract-full').style.display = 'none'; document.getElementById('1805.10719v1-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, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">23 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Science 365, 914 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.05547">arXiv:1805.05547</a> <span> [<a href="https://arxiv.org/pdf/1805.05547">pdf</a>, <a href="https://arxiv.org/format/1805.05547">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.97.205142">10.1103/PhysRevB.97.205142 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Commensurate vs incommensurate charge ordering near the superconducting dome in Ir$_{1-x}$Pt$_x$Te$_2$ revealed by resonant x-ray scattering </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Takubo%2C+K">K. Takubo</a>, <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+K">K. Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Hirata%2C+Y">Y. Hirata</a>, <a href="/search/cond-mat?searchtype=author&query=Wadati%2C+H">H. Wadati</a>, <a href="/search/cond-mat?searchtype=author&query=Mizokawa%2C+T">T. Mizokawa</a>, <a href="/search/cond-mat?searchtype=author&query=Sutarto%2C+R">R. Sutarto</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+F">F. He</a>, <a href="/search/cond-mat?searchtype=author&query=Ishii%2C+K">K. Ishii</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Y. Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Matsuo%2C+G">G. Matsuo</a>, <a href="/search/cond-mat?searchtype=author&query=Ishii%2C+H">H. Ishii</a>, <a href="/search/cond-mat?searchtype=author&query=Kobayashi%2C+M">M. Kobayashi</a>, <a href="/search/cond-mat?searchtype=author&query=Kudo%2C+K">K. Kudo</a>, <a href="/search/cond-mat?searchtype=author&query=Nohara%2C+M">M. Nohara</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="1805.05547v1-abstract-short" style="display: inline;"> The electronic-structural modulations of Ir$_{1-x}$Pt$_x$Te$_2$ (0 $\leqq x\leqq$ 0.12) have been examined by resonant elastic x-ray scattering (REXS) and resonant inelastic x-ray scattering (RIXS) techniques at both the Ir and Te edges. Charge-density-wave-like superstructure with wave vectors of $\mathbf{Q}$=(1/5 0 $-$1/5), (1/8 0 $-$1/8), and (1/6 0 $-$1/6) are observed on the same sample of Ir… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.05547v1-abstract-full').style.display = 'inline'; document.getElementById('1805.05547v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.05547v1-abstract-full" style="display: none;"> The electronic-structural modulations of Ir$_{1-x}$Pt$_x$Te$_2$ (0 $\leqq x\leqq$ 0.12) have been examined by resonant elastic x-ray scattering (REXS) and resonant inelastic x-ray scattering (RIXS) techniques at both the Ir and Te edges. Charge-density-wave-like superstructure with wave vectors of $\mathbf{Q}$=(1/5 0 $-$1/5), (1/8 0 $-$1/8), and (1/6 0 $-$1/6) are observed on the same sample of IrTe$_2$ at the lowest temperature, the patterns of which are controlled by the cooling speeds. In contrast, superstructures around $\mathbf{Q}$=(1/5 0 $-$1/5) are observed for doped samples (0.02 $\leqq x\leqq$ 0.05). The superstructure reflections persist to higher Pt substitution than previously assumed, demonstrating that a charge density wave (CDW) can coexists with superconductivity. The analysis of the energy-dependent REXS and RIXS lineshape reveals the importance of the Te 5$p$ state rather than the Ir 5$d$ states in the formation of the spatial modulation of these systems. The phase diagram re-examined in this work suggests that the CDW incommensurability may correlate the emergence of superconducting states as-like Cu$_x$TiSe$_2$ and Li$_x$TaS$_2$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.05547v1-abstract-full').style.display = 'none'; document.getElementById('1805.05547v1-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 May, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages ,9 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/1709.08313">arXiv:1709.08313</a> <span> [<a href="https://arxiv.org/pdf/1709.08313">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/2053-1583/aa8a2b">10.1088/2053-1583/aa8a2b <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Exfoliation and van der Waals heterostructure assembly of intercalated ferromagnet Cr1/3TaS2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuji Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Moriya%2C+R">Rai Moriya</a>, <a href="/search/cond-mat?searchtype=author&query=Arai%2C+M">Miho Arai</a>, <a href="/search/cond-mat?searchtype=author&query=Masubuchi%2C+S">Satoru Masubuchi</a>, <a href="/search/cond-mat?searchtype=author&query=Pyon%2C+S">Sunseng Pyon</a>, <a href="/search/cond-mat?searchtype=author&query=Tamegai%2C+T">Tsuyoshi Tamegai</a>, <a href="/search/cond-mat?searchtype=author&query=Ueno%2C+K">Keiji Ueno</a>, <a href="/search/cond-mat?searchtype=author&query=Machida%2C+T">Tomoki Machida</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1709.08313v1-abstract-short" style="display: inline;"> Ferromagnetic van der Waals (vdW) materials are in demand for spintronic devices with all-two-dimensional-materials heterostructures. Here, we demonstrate mechanical exfoliation of magnetic-atom-intercalated transition metal dichalcogenide Cr1/3TaS2 from its bulk crystal; previously such intercalated materials were thought difficult to exfoliate. Magnetotransport in exfoliated tens-of-nanometres-t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.08313v1-abstract-full').style.display = 'inline'; document.getElementById('1709.08313v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1709.08313v1-abstract-full" style="display: none;"> Ferromagnetic van der Waals (vdW) materials are in demand for spintronic devices with all-two-dimensional-materials heterostructures. Here, we demonstrate mechanical exfoliation of magnetic-atom-intercalated transition metal dichalcogenide Cr1/3TaS2 from its bulk crystal; previously such intercalated materials were thought difficult to exfoliate. Magnetotransport in exfoliated tens-of-nanometres-thick flakes revealed ferromagnetic ordering below its Curie temperature TC ~ 110 K as well as strong in-plane magnetic anisotropy; these are identical to its bulk properties. Further, van der Waals heterostructure assembly of Cr1/3TaS2 with another intercalated ferromagnet Fe1/4TaS2 is demonstrated using a dry-transfer method. The fabricated heterojunction composed of Cr1/3TaS2 and Fe1/4TaS2 with a native Ta2O5 oxide tunnel barrier in between exhibits tunnel magnetoresistance (TMR), revealing possible spin injection and detection with these exfoliatable ferromagnetic materials through the vdW junction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1709.08313v1-abstract-full').style.display = 'none'; document.getElementById('1709.08313v1-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 September, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 10 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 4, 041007 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1708.07529">arXiv:1708.07529</a> <span> [<a href="https://arxiv.org/pdf/1708.07529">pdf</a>, <a href="https://arxiv.org/format/1708.07529">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.120.206402">10.1103/PhysRevLett.120.206402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tensile-Strain Dependent Spin States in Epitaxial LaCoO$_3$ Thin Films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yokoyama%2C+Y">Y. Yokoyama</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Taguchi%2C+M">M. Taguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Hirata%2C+Y">Y. Hirata</a>, <a href="/search/cond-mat?searchtype=author&query=Takubo%2C+K">K. Takubo</a>, <a href="/search/cond-mat?searchtype=author&query=Miyawaki%2C+J">J. Miyawaki</a>, <a href="/search/cond-mat?searchtype=author&query=Harada%2C+Y">Y. Harada</a>, <a href="/search/cond-mat?searchtype=author&query=Asakura%2C+D">D. Asakura</a>, <a href="/search/cond-mat?searchtype=author&query=Fujioka%2C+J">J. Fujioka</a>, <a href="/search/cond-mat?searchtype=author&query=Nakamura%2C+M">M. Nakamura</a>, <a href="/search/cond-mat?searchtype=author&query=Daimon%2C+H">H. Daimon</a>, <a href="/search/cond-mat?searchtype=author&query=Kawasaki%2C+M">M. Kawasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a>, <a href="/search/cond-mat?searchtype=author&query=Wadati%2C+H">H. Wadati</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="1708.07529v2-abstract-short" style="display: inline;"> The spin states of Co$^{3+}$ ions in perovskite-type LaCoO$_3$, governed by complex interplay between the electron-lattice interactions and the strong electron correlations, still remain controversial due to the lack of experimental techniques which can detect directly. In this letter, we revealed the tensile-strain dependence of spin states, $i. e.$ the ratio of the high- and low-spin states, in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.07529v2-abstract-full').style.display = 'inline'; document.getElementById('1708.07529v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1708.07529v2-abstract-full" style="display: none;"> The spin states of Co$^{3+}$ ions in perovskite-type LaCoO$_3$, governed by complex interplay between the electron-lattice interactions and the strong electron correlations, still remain controversial due to the lack of experimental techniques which can detect directly. In this letter, we revealed the tensile-strain dependence of spin states, $i. e.$ the ratio of the high- and low-spin states, in epitaxial thin films and a bulk crystal of LaCoO$_3$ via resonant inelastic soft x-ray scattering. The tensile-strain as small as 1.0% was found to realize different spin states from that in the bulk. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1708.07529v2-abstract-full').style.display = 'none'; document.getElementById('1708.07529v2-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, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 August, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">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. Lett. 120, 206402 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1706.06373">arXiv:1706.06373</a> <span> [<a href="https://arxiv.org/pdf/1706.06373">pdf</a>, <a href="https://arxiv.org/ps/1706.06373">ps</a>, <a href="https://arxiv.org/format/1706.06373">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.95.224440">10.1103/PhysRevB.95.224440 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-pressure synthesis of an unusual antiferromagnetic metal CaCoO$_{3}$ with GdFeO$_{3}$-type perovskite structure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Osaka%2C+T">T. Osaka</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+H">H. Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">H. Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">S. Ishiwata</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="1706.06373v2-abstract-short" style="display: inline;"> The GdFeO$_{3}$-type perovskite CaCoO$_{3}$ has been successfully synthesized by high-pressure oxygen annealing for the oxygen deficient perovskite. A detailed structural analysis based on synchrotron X-ray diffraction data and a thermogravimetric analysis show that the valence of Co is +4 and the sample is free from oxygen deficiency. This compound shows an antiferromagnetic ordering at 95 K, whi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.06373v2-abstract-full').style.display = 'inline'; document.getElementById('1706.06373v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1706.06373v2-abstract-full" style="display: none;"> The GdFeO$_{3}$-type perovskite CaCoO$_{3}$ has been successfully synthesized by high-pressure oxygen annealing for the oxygen deficient perovskite. A detailed structural analysis based on synchrotron X-ray diffraction data and a thermogravimetric analysis show that the valence of Co is +4 and the sample is free from oxygen deficiency. This compound shows an antiferromagnetic ordering at 95 K, which has presumably helical spin arrangement, with keeping the incoherent metallic state down to the lowest temperature. This work demonstrates that the Co$^{4+}$-perovskite oxides exhibit a variety of magnetic phases by the band-width control through the lattice distortion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1706.06373v2-abstract-full').style.display = 'none'; document.getElementById('1706.06373v2-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 July, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 June, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 95, 224440 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1703.09995">arXiv:1703.09995</a> <span> [<a href="https://arxiv.org/pdf/1703.09995">pdf</a>, <a href="https://arxiv.org/ps/1703.09995">ps</a>, <a href="https://arxiv.org/format/1703.09995">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.97.075134">10.1103/PhysRevB.97.075134 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thickness dependence and dimensionality effects of charge and magnetic orderings in La1/3Sr2/3FeO3 thin films </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yamamoto%2C+K">Kohei Yamamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Hirata%2C+Y">Yasuyuki Hirata</a>, <a href="/search/cond-mat?searchtype=author&query=Horio%2C+M">Masafumi Horio</a>, <a href="/search/cond-mat?searchtype=author&query=Yokoyama%2C+Y">Yuichi Yokoyama</a>, <a href="/search/cond-mat?searchtype=author&query=Takubo%2C+K">Kou Takubo</a>, <a href="/search/cond-mat?searchtype=author&query=Minohara%2C+M">Makoto Minohara</a>, <a href="/search/cond-mat?searchtype=author&query=Kumigashira%2C+H">Hiroshi Kumigashira</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Youichi Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Fujimori%2C+A">Atsushi Fujimori</a>, <a href="/search/cond-mat?searchtype=author&query=Wadati%2C+H">Hiroki Wadati</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="1703.09995v1-abstract-short" style="display: inline;"> We investigate the thickness effects on charge and magnetic orderings in Fe perovskite oxide La1/3Sr2/3FeO3/SrTiO3 thin films by hard x-ray and resonant soft x-ray scattering (RSXS) with changing thin film thickness systematically. We found that the correlation lengths of the magnetic ordering along the in-plane and out-of-plane directions are comparable and proportional to the thickness, and show… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.09995v1-abstract-full').style.display = 'inline'; document.getElementById('1703.09995v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1703.09995v1-abstract-full" style="display: none;"> We investigate the thickness effects on charge and magnetic orderings in Fe perovskite oxide La1/3Sr2/3FeO3/SrTiO3 thin films by hard x-ray and resonant soft x-ray scattering (RSXS) with changing thin film thickness systematically. We found that the correlation lengths of the magnetic ordering along the in-plane and out-of-plane directions are comparable and proportional to the thickness, and shows stronger thickness dependence than those of charge orderg. %the thickness dependence of correlation length of charge ordering is smaller than that of magnetic orderings. The magnetic ordered states disappear when the correlation length of magnetic ordering decreases to that of charge ordering through the intrinsic thickness effects. Surface sensitive grazing-incident RSXS revealed that the orderings exist even in the surface region, which indicates that the observed orderings is not affected by surface effect like oxygen vacancies. Critical thickness is in 5-15 nm, which corresponds to 4-11 antiferromagnetic ordering period. This critical value seems to be common to other ferromagnetic oxide thin films. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.09995v1-abstract-full').style.display = 'none'; document.getElementById('1703.09995v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 March, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 97, 075134 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1703.04127">arXiv:1703.04127</a> <span> [<a href="https://arxiv.org/pdf/1703.04127">pdf</a>, <a href="https://arxiv.org/ps/1703.04127">ps</a>, <a href="https://arxiv.org/format/1703.04127">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/10.1126/sciadv.1501117">10.1126/sciadv.1501117 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Quantum Hall effect in a bulk antiferromagnet EuMnBi$_2$ with magnetically confined two-dimensional Dirac fermions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Masuda%2C+H">H. Masuda</a>, <a href="/search/cond-mat?searchtype=author&query=Sakai%2C+H">H. Sakai</a>, <a href="/search/cond-mat?searchtype=author&query=Tokunaga%2C+M">M. Tokunaga</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Miyake%2C+A">A. Miyake</a>, <a href="/search/cond-mat?searchtype=author&query=Shiogai%2C+J">J. Shiogai</a>, <a href="/search/cond-mat?searchtype=author&query=Nakamura%2C+S">S. Nakamura</a>, <a href="/search/cond-mat?searchtype=author&query=Awaji%2C+S">S. Awaji</a>, <a href="/search/cond-mat?searchtype=author&query=Tsukazaki%2C+A">A. Tsukazaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Y. Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T+H">T. H. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a>, <a href="/search/cond-mat?searchtype=author&query=Ishiwata%2C+S">S. Ishiwata</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="1703.04127v1-abstract-short" style="display: inline;"> For the innovation of spintronic technologies, Dirac materials, in which the low-energy excitation is described as relativistic Dirac fermions, are one of the most promising systems, because of the fascinating magnetotransport associated with the extremely high mobility. To incorporate Dirac fermions into spintronic applications, their quantum transport phenomena are desired to be manipulated to a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.04127v1-abstract-full').style.display = 'inline'; document.getElementById('1703.04127v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1703.04127v1-abstract-full" style="display: none;"> For the innovation of spintronic technologies, Dirac materials, in which the low-energy excitation is described as relativistic Dirac fermions, are one of the most promising systems, because of the fascinating magnetotransport associated with the extremely high mobility. To incorporate Dirac fermions into spintronic applications, their quantum transport phenomena are desired to be manipulated to a large extent by magnetic order in a solid. We here report a bulk half-integer quantum Hall effect in a layered antiferromagnet EuMnBi$_2$, in which field-controllable Eu magnetic order significantly suppresses the interlayer coupling between the Bi layers with Dirac fermions. In addition to the high mobility more than 10,000 cm$^2$/Vs, Landau level splittings presumably due to the lifting of spin and valley degeneracy are noticeable even in a bulk magnet. These results will pave a route to the engineering of magnetically functionalized Dirac materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1703.04127v1-abstract-full').style.display = 'none'; document.getElementById('1703.04127v1-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 March, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, 4 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Science Advances 2, e1501117 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.02139">arXiv:1503.02139</a> <span> [<a href="https://arxiv.org/pdf/1503.02139">pdf</a>, <a href="https://arxiv.org/ps/1503.02139">ps</a>, <a href="https://arxiv.org/format/1503.02139">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/10.7566/JPSJ.85.094702">10.7566/JPSJ.85.094702 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Microscopic examinations of Co valences and spin states in electron-doped LaCoO$_{3}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Tomiyasu%2C+K">Keisuke Tomiyasu</a>, <a href="/search/cond-mat?searchtype=author&query=Koyama%2C+S">Syun-Ichi Koyama</a>, <a href="/search/cond-mat?searchtype=author&query=Watahiki%2C+M">Masanori Watahiki</a>, <a href="/search/cond-mat?searchtype=author&query=Sato%2C+M">Mika Sato</a>, <a href="/search/cond-mat?searchtype=author&query=Nishihara%2C+K">Kazuki Nishihara</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+Y">Yuki Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Onodera%2C+M">Mitsugi Onodera</a>, <a href="/search/cond-mat?searchtype=author&query=Iwasa%2C+K">Kazuaki Iwasa</a>, <a href="/search/cond-mat?searchtype=author&query=Nojima%2C+T">Tsutomu Nojima</a>, <a href="/search/cond-mat?searchtype=author&query=Nojiri%2C+H">Hiroyuki Nojiri</a>, <a href="/search/cond-mat?searchtype=author&query=Okamoto%2C+J">Jun Okamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+D">Di-Jing Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Youichi Murakami</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="1503.02139v4-abstract-short" style="display: inline;"> We studied the Co valences and spin states in electron-doped LaCo$_{1-y}$Te$_{y}$O$_3$ by measuring x-ray absorption spectra and electron spin resonance. The low-temperature insulating state involves the low-spin Co$^{3+}$ ($S=0$) and the high-spin Co$^{2+}$ state, which is described by $g=3.8$ and $j_{\rm eff}=1/2$. The results, in concurrence with the electron-hole asymmetry confirmed in electri… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.02139v4-abstract-full').style.display = 'inline'; document.getElementById('1503.02139v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.02139v4-abstract-full" style="display: none;"> We studied the Co valences and spin states in electron-doped LaCo$_{1-y}$Te$_{y}$O$_3$ by measuring x-ray absorption spectra and electron spin resonance. The low-temperature insulating state involves the low-spin Co$^{3+}$ ($S=0$) and the high-spin Co$^{2+}$ state, which is described by $g=3.8$ and $j_{\rm eff}=1/2$. The results, in concurrence with the electron-hole asymmetry confirmed in electrical resistivity, coincide with a spin-blockade phenomenon in this system. Further, we discuss the $g$ factor in terms of the strong covalent-bonding nature and consider multiple origins of this phenomenon. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.02139v4-abstract-full').style.display = 'none'; document.getElementById('1503.02139v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 5 figures, and 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys. Soc. Jpn. 85 , 094702 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1210.3093">arXiv:1210.3093</a> <span> [<a href="https://arxiv.org/pdf/1210.3093">pdf</a>, <a href="https://arxiv.org/ps/1210.3093">ps</a>, <a href="https://arxiv.org/format/1210.3093">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.86.165126">10.1103/PhysRevB.86.165126 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pseudogap-related charge dynamics in layered-nickelate R2-xSrxNiO4 (x sim 1) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Uchida%2C+M">M. Uchida</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Kaneko%2C+Y">Y. Kaneko</a>, <a href="/search/cond-mat?searchtype=author&query=Ishizaka%2C+K">K. Ishizaka</a>, <a href="/search/cond-mat?searchtype=author&query=Okamoto%2C+J">J. Okamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Y. Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</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="1210.3093v1-abstract-short" style="display: inline;"> Charge dynamics and its critical behavior are investigated near the metal-insulator transition of layered-nickelate R2-xSrxNiO4 (R=Nd, Eu). The polarized x-ray absorption spectroscopy experiment clearly shows the multi-orbital nature which enables the x2-y2-orbital-based checkerboard-type charge ordering or correlation to persist up to the critical doping region (x sim 1). In the barely metallic r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.3093v1-abstract-full').style.display = 'inline'; document.getElementById('1210.3093v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1210.3093v1-abstract-full" style="display: none;"> Charge dynamics and its critical behavior are investigated near the metal-insulator transition of layered-nickelate R2-xSrxNiO4 (R=Nd, Eu). The polarized x-ray absorption spectroscopy experiment clearly shows the multi-orbital nature which enables the x2-y2-orbital-based checkerboard-type charge ordering or correlation to persist up to the critical doping region (x sim 1). In the barely metallic region proximate to the charge-ordered insulating phase, the nominal carrier density estimated from the Hall coefficient markedly decreases in accord with development of the pseudogap structure in the optical conductivity spectrum, while the effective mass is least enhanced. The present findings combined with the results of recent angle-resolved photoemission spectroscopy show that the pseudogap in the metal-insulator critical state evolves due to the checkerboard-type charge correlation to extinguish the coherent-motion carriers in a characteristic momentum (k)-dependent manner with lowering temperature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.3093v1-abstract-full').style.display = 'none'; document.getElementById('1210.3093v1-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 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 6 figures. Accepted in 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/1209.1250">arXiv:1209.1250</a> <span> [<a href="https://arxiv.org/pdf/1209.1250">pdf</a>, <a href="https://arxiv.org/ps/1209.1250">ps</a>, <a href="https://arxiv.org/format/1209.1250">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1063/1.4757632">10.1063/1.4757632 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High-temperature thermoelectric properties of the double-perovskite ruthenium oxide (Sr$_{1-x}$La$_x$)$_2$ErRuO$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+R">Ryohei Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Okazaki%2C+R">Ryuji Okazaki</a>, <a href="/search/cond-mat?searchtype=author&query=Yasui%2C+Y">Yukio Yasui</a>, <a href="/search/cond-mat?searchtype=author&query=Terasaki%2C+I">Ichiro Terasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sudayama%2C+T">Takaaki Sudayama</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">Hironori Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Yuichi Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Okamoto%2C+J">Jun Okamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Youichi Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Kitajima%2C+Y">Yoshinori Kitajima</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="1209.1250v1-abstract-short" style="display: inline;"> We have prepared polycrystalline samples of (Sr$_{1-x}$La$_x$)$_2$ErRuO$_6$ and (Sr$_{1-x}$La$_x$)$_2$YRuO$_6$, and have measured the resistivity, Seebeck coefficient, thermal conductivity, susceptibility and x-ray absorption in order to evaluate the electronic states and thermoelectric properties of the doped double-perovskite ruthenates. We have observed a large Seebeck coefficient of -160 $渭$V/… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.1250v1-abstract-full').style.display = 'inline'; document.getElementById('1209.1250v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1209.1250v1-abstract-full" style="display: none;"> We have prepared polycrystalline samples of (Sr$_{1-x}$La$_x$)$_2$ErRuO$_6$ and (Sr$_{1-x}$La$_x$)$_2$YRuO$_6$, and have measured the resistivity, Seebeck coefficient, thermal conductivity, susceptibility and x-ray absorption in order to evaluate the electronic states and thermoelectric properties of the doped double-perovskite ruthenates. We have observed a large Seebeck coefficient of -160 $渭$V/K and a low thermal conductivity of 7 mW/cmK for $x$=0.1 at 800 K in air. These two values are suitable for efficient oxide thermoelectrics, although the resistivity is still as high as 1 $惟$cm. From the susceptibility and x-ray absorption measurements, we find that the doped electrons exist as Ru$^{4+}$ in the low spin state. On the basis of the measured results, the electronic states and the conduction mechanism are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.1250v1-abstract-full').style.display = 'none'; document.getElementById('1209.1250v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 September, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures, J. Appl. Phys. (accepted)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1110.0894">arXiv:1110.0894</a> <span> [<a href="https://arxiv.org/pdf/1110.0894">pdf</a>, <a href="https://arxiv.org/ps/1110.0894">ps</a>, <a href="https://arxiv.org/format/1110.0894">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.84.140409">10.1103/PhysRevB.84.140409 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Effect of cation size variance on spin and orbital order in Eu$_{1-x}$(La$_{0.254}$Y$_{0.746}$)$_{x}$VO$_3$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Fukuta%2C+R">R. Fukuta</a>, <a href="/search/cond-mat?searchtype=author&query=Miyasaka%2C+S">S. Miyasaka</a>, <a href="/search/cond-mat?searchtype=author&query=Hemmi%2C+K">K. Hemmi</a>, <a href="/search/cond-mat?searchtype=author&query=Tajima%2C+S">S. Tajima</a>, <a href="/search/cond-mat?searchtype=author&query=Kawana%2C+D">D. Kawana</a>, <a href="/search/cond-mat?searchtype=author&query=Ikeuchi%2C+K">K. Ikeuchi</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+A">A. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Y. Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Iwasa%2C+K">K. Iwasa</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="1110.0894v1-abstract-short" style="display: inline;"> We have investigated the $R$-ion ($R$ = rare earth or Y) size variance effect on spin/orbital order in Eu$_{1-x}$(La$_{0.254}$Y$_{0.746}$)$_{x}$VO$_3$. The size variance disturbs one-dimensional orbital correlation in $C$-type spin/$G$-type orbital ordered states and suppresses this spin/orbital order. In contrast, it stabilizes the other spin/orbital order. The results of neutron and resonant X-r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.0894v1-abstract-full').style.display = 'inline'; document.getElementById('1110.0894v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1110.0894v1-abstract-full" style="display: none;"> We have investigated the $R$-ion ($R$ = rare earth or Y) size variance effect on spin/orbital order in Eu$_{1-x}$(La$_{0.254}$Y$_{0.746}$)$_{x}$VO$_3$. The size variance disturbs one-dimensional orbital correlation in $C$-type spin/$G$-type orbital ordered states and suppresses this spin/orbital order. In contrast, it stabilizes the other spin/orbital order. The results of neutron and resonant X-ray scattering denote that in the other ordered phase, the spin/orbital patterns are $G$-type/$C$-type, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1110.0894v1-abstract-full').style.display = 'none'; document.getElementById('1110.0894v1-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 October, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 4 figures, accepted to Rapid Communication in Physical Review B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 84, 140409(R) (2011) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1109.2366">arXiv:1109.2366</a> <span> [<a href="https://arxiv.org/pdf/1109.2366">pdf</a>, <a href="https://arxiv.org/ps/1109.2366">ps</a>, <a href="https://arxiv.org/format/1109.2366">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.108.047203">10.1103/PhysRevLett.108.047203 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Origin of the large polarization in multiferroic YMnO$_3$ thin films revealed by soft and hard x-ray diffraction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wadati%2C+H">H. Wadati</a>, <a href="/search/cond-mat?searchtype=author&query=Okamoto%2C+J">J. Okamoto</a>, <a href="/search/cond-mat?searchtype=author&query=Garganourakis%2C+M">M. Garganourakis</a>, <a href="/search/cond-mat?searchtype=author&query=Scagnoli%2C+V">V. Scagnoli</a>, <a href="/search/cond-mat?searchtype=author&query=Staub%2C+U">U. Staub</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakao%2C+H">H. Nakao</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Y. Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Mochizuki%2C+M">M. Mochizuki</a>, <a href="/search/cond-mat?searchtype=author&query=Nakamura%2C+M">M. Nakamura</a>, <a href="/search/cond-mat?searchtype=author&query=Kawasaki%2C+M">M. Kawasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</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="1109.2366v1-abstract-short" style="display: inline;"> We investigated the magnetic structure of an orthorhombic YMnO3 thin film by resonant soft x-ray and hard x-ray diffraction. We observed a temperature-dependent incommensurate magnetic reflection below 45 K and a commensurate lattice-distortion reflection below 35 K. These results demonstrate that the ground state is composed of coexisting E-type and cycloidal states. Their different ordering temp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1109.2366v1-abstract-full').style.display = 'inline'; document.getElementById('1109.2366v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1109.2366v1-abstract-full" style="display: none;"> We investigated the magnetic structure of an orthorhombic YMnO3 thin film by resonant soft x-ray and hard x-ray diffraction. We observed a temperature-dependent incommensurate magnetic reflection below 45 K and a commensurate lattice-distortion reflection below 35 K. These results demonstrate that the ground state is composed of coexisting E-type and cycloidal states. Their different ordering temperatures clarify the origin of the large polarization to be caused by the E-type antiferromagnetic states in the orthorhombic YMnO3 thin film. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1109.2366v1-abstract-full').style.display = 'none'; document.getElementById('1109.2366v1-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, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 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. Lett. 108, 047203 (2012) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0904.4796">arXiv:0904.4796</a> <span> [<a href="https://arxiv.org/pdf/0904.4796">pdf</a>, <a href="https://arxiv.org/ps/0904.4796">ps</a>, <a href="https://arxiv.org/format/0904.4796">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/10.1364/JOSAB.26.000A35">10.1364/JOSAB.26.000A35 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Terahertz time-domain spectroscopy of electromagnons in multiferroic perovskite manganites </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kida%2C+N">N. Kida</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+Y">Y. Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+J+S">J. S. Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Shimano%2C+R">R. Shimano</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Kaneko%2C+Y">Y. Kaneko</a>, <a href="/search/cond-mat?searchtype=author&query=Miyahara%2C+S">S. Miyahara</a>, <a href="/search/cond-mat?searchtype=author&query=Furukawa%2C+N">N. Furukawa</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</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="0904.4796v1-abstract-short" style="display: inline;"> Recent spectroscopic studies at terahertz frequencies for a variety of multiferroics endowed with both ferroelectric and magnetic orders have revealed the possible emergence of a new collective excitation, frequently referred to as electromagnon. It is magnetic origin, but becomes active in response to the electric field component of light. Here we give an overview on our recent advance in the t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0904.4796v1-abstract-full').style.display = 'inline'; document.getElementById('0904.4796v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0904.4796v1-abstract-full" style="display: none;"> Recent spectroscopic studies at terahertz frequencies for a variety of multiferroics endowed with both ferroelectric and magnetic orders have revealed the possible emergence of a new collective excitation, frequently referred to as electromagnon. It is magnetic origin, but becomes active in response to the electric field component of light. Here we give an overview on our recent advance in the terahertz time-domain spectroscopy of electromagnons or electric-dipole active magnetic resonances, focused on perovskite manganites--$R$MnO$_3$ ($R$ denotes rare-earth ions). The respective electric and magnetic contributions to the observed magnetic resonance are firmly identified by the measurements of the light-polarization dependence using a complete set of the crystal orientations. We extract general optical features in a variety of the spin ordered phases, including the $A$-type antiferromagnetic, collinear spin ordered, and ferroelectric $bc$ and $ab$ spiral spin ordered phases, which are realized by tuning the chemical composition of $R$, temperature, and external magnetic field. In addition to the antiferromagnetic resonances of Mn ions driven by the magnetic field component of light, we clarify that the electromagnon appears only for light polarized along the a-axis even in the collinear spin ordered phase and grows in intensity with evolution of the spiral spin order, but independent of the direction of the spiral spin plane ($bc$ or $ab$) or equivalently the direction of the ferroelectric polarization $P_{\rm s}$ ($P_{\rm s}\| c$ or $P_{\rm s}\| a$). A possible origin of the observed magnetic resonances at terahertz frequencies is discussed by comparing the systematic experimental data presented here with theoretical considerations based on Heisenberg model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0904.4796v1-abstract-full').style.display = 'none'; document.getElementById('0904.4796v1-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, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2009. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages including 15 figures and 2 tables; Invited Paper in Special Issue on Terahertz Wave Photonics in J. Opt. Soc. Am. B (Accepted for publication)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Opt. Soc. Am. B 26, A35-A51 (2009). </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0811.4098">arXiv:0811.4098</a> <span> [<a href="https://arxiv.org/pdf/0811.4098">pdf</a>, <a href="https://arxiv.org/ps/0811.4098">ps</a>, <a href="https://arxiv.org/format/0811.4098">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/10.1143/JPSJ.77.123704">10.1143/JPSJ.77.123704 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electric-dipole active two-magnon excitation in {\textit{ab}} spiral spin phase of a ferroelectric magnet Gd$_{\textbf{0.7}}$Tb$_{\textbf{0.3}}$MnO$_{\textbf 3}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kida%2C+N">N. Kida</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Shimano%2C+R">R. Shimano</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</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="0811.4098v1-abstract-short" style="display: inline;"> A broad continuum-like spin excitation (1--10 meV) with a peak structure around 2.4 meV has been observed in the ferroelectric $ab$ spiral spin phase of Gd$_{0.7}$Tb$_{0.3}$MnO$_3$ by using terahertz (THz) time-domain spectroscopy. Based on a complete set of light-polarization measurements, we identify the spin excitation active for the light $E$ vector only along the a-axis, which grows in inte… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0811.4098v1-abstract-full').style.display = 'inline'; document.getElementById('0811.4098v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0811.4098v1-abstract-full" style="display: none;"> A broad continuum-like spin excitation (1--10 meV) with a peak structure around 2.4 meV has been observed in the ferroelectric $ab$ spiral spin phase of Gd$_{0.7}$Tb$_{0.3}$MnO$_3$ by using terahertz (THz) time-domain spectroscopy. Based on a complete set of light-polarization measurements, we identify the spin excitation active for the light $E$ vector only along the a-axis, which grows in intensity with lowering temperature even from above the magnetic ordering temperature but disappears upon the transition to the $A$-type antiferromagnetic phase. Such an electric-dipole active spin excitation as observed at THz frequencies can be ascribed to the two-magnon excitation in terms of the unique polarization selection rule in a variety of the magnetically ordered phases. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0811.4098v1-abstract-full').style.display = 'none'; document.getElementById('0811.4098v1-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 November, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2008. </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 including 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys. Soc. Jpn. 77, 123704 (2008) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0801.2533">arXiv:0801.2533</a> <span> [<a href="https://arxiv.org/pdf/0801.2533">pdf</a>, <a href="https://arxiv.org/ps/0801.2533">ps</a>, <a href="https://arxiv.org/format/0801.2533">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.100.127201">10.1103/PhysRevLett.100.127201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Correlation between spin helicity and electric polarization vector in quantum-spin chain magnet LiCu$_2$O$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Seki%2C+S">S. Seki</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Soda%2C+M">M. Soda</a>, <a href="/search/cond-mat?searchtype=author&query=Matsuura%2C+M">M. Matsuura</a>, <a href="/search/cond-mat?searchtype=author&query=Hirota%2C+K">K. Hirota</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</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="0801.2533v1-abstract-short" style="display: inline;"> Measurements of polarized neutron scattering were performed on a $S=1/2$ chain multiferroic LiCu$_2$O$_2$. In the ferroelectric ground state with the spontaneous polarization along the c-axis, the existence of transverse spiral spin component in the $bc$-plane was confirmed. When the direction of electric polarization is reversed, the vector spin chirality as defined by… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0801.2533v1-abstract-full').style.display = 'inline'; document.getElementById('0801.2533v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0801.2533v1-abstract-full" style="display: none;"> Measurements of polarized neutron scattering were performed on a $S=1/2$ chain multiferroic LiCu$_2$O$_2$. In the ferroelectric ground state with the spontaneous polarization along the c-axis, the existence of transverse spiral spin component in the $bc$-plane was confirmed. When the direction of electric polarization is reversed, the vector spin chirality as defined by ${\bf C}_{ij} = {\bf S}_i \times {\bf S}_j$ ($i$ and $j$ being the neighboring spin sites) is observed to be reversed, indicating that the spin-current model or the inverse Dzyaloshinskii-Moriya mechanism is applicable even to this $e_{\mathrm{g}}$-electron quantum-spin system. Differential scattering intensity of polarized neutrons shows a large discrepancy from that expected for the classical-spin $bc$-cycloidal structure, implying the effect of large quantum fluctuation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0801.2533v1-abstract-full').style.display = 'none'; document.getElementById('0801.2533v1-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 January, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2008. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0711.2733">arXiv:0711.2733</a> <span> [<a href="https://arxiv.org/pdf/0711.2733">pdf</a>, <a href="https://arxiv.org/ps/0711.2733">ps</a>, <a href="https://arxiv.org/format/0711.2733">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.78.104414">10.1103/PhysRevB.78.104414 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electrically driven spin excitation in a ferroelectric magnet DyMnO_3 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kida%2C+N">N. Kida</a>, <a href="/search/cond-mat?searchtype=author&query=Ikebe%2C+Y">Y. Ikebe</a>, <a href="/search/cond-mat?searchtype=author&query=Takahashi%2C+Y">Y. Takahashi</a>, <a href="/search/cond-mat?searchtype=author&query=He%2C+J+P">J. P. He</a>, <a href="/search/cond-mat?searchtype=author&query=Kaneko%2C+Y">Y. Kaneko</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Shimano%2C+R">R. Shimano</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Nagaosa%2C+N">N. Nagaosa</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</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="0711.2733v2-abstract-short" style="display: inline;"> Temperature (5--250 K) and magnetic field (0--70 kOe) variations of the low-energy (1--10 meV) electrodynamics of spin excitations have been investigated for a complete set of light-polarization configurations for a ferroelectric magnet DyMnO$_3$ by using terahertz time-domain spectroscopy. We identify the pronounced absorption continuum (1--8 meV) with a peak feature around 2 meV, which is elec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0711.2733v2-abstract-full').style.display = 'inline'; document.getElementById('0711.2733v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0711.2733v2-abstract-full" style="display: none;"> Temperature (5--250 K) and magnetic field (0--70 kOe) variations of the low-energy (1--10 meV) electrodynamics of spin excitations have been investigated for a complete set of light-polarization configurations for a ferroelectric magnet DyMnO$_3$ by using terahertz time-domain spectroscopy. We identify the pronounced absorption continuum (1--8 meV) with a peak feature around 2 meV, which is electric-dipole active only for the light $E$-vector along the a-axis. This absorption band grows in intensity with lowering temperature from the spin-collinear paraelectric phase above the ferroelectric transition, but is independent of the orientation of spiral spin plane ($bc$ or $ab$), as shown on the original $P_{\rm s}$ (ferroelectric polarization) $\parallel c$ phase as well as the magnetic field induced $P_{\rm s}\parallel a$ phase. The possible origin of this electric-dipole active band is argued in terms of the large fluctuations of spins and spin-current. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0711.2733v2-abstract-full').style.display = 'none'; document.getElementById('0711.2733v2-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 August, 2008; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 November, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2007. </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">New version, 11 pages including colored 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phy. Rev. B 78, 104414 (2008) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/0701430">arXiv:cond-mat/0701430</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0701430">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0701430">ps</a>, <a href="https://arxiv.org/format/cond-mat/0701430">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.100.219902">10.1103/PhysRevLett.100.219902 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electric Control of Spin Helicity in a Magnetic Ferroelectric </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Sagayama%2C+H">H. Sagayama</a>, <a href="/search/cond-mat?searchtype=author&query=Goto%2C+T">T. Goto</a>, <a href="/search/cond-mat?searchtype=author&query=Matsuura%2C+M">M. Matsuura</a>, <a href="/search/cond-mat?searchtype=author&query=Hirota%2C+K">K. Hirota</a>, <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="cond-mat/0701430v1-abstract-short" style="display: inline;"> Magnetic ferroelectrics or multiferroics, which are currently extensively explored, may provide a good arena to realize a novel magnetoelectric function. Here we demonstrate the genuine electric control of the spiral magnetic structure in one of such magnetic ferroelectrics, TbMnO3. A spin-polarized neutron scattering experiment clearly shows that the spin helicity, clockwise or counter-clockwis… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0701430v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0701430v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0701430v1-abstract-full" style="display: none;"> Magnetic ferroelectrics or multiferroics, which are currently extensively explored, may provide a good arena to realize a novel magnetoelectric function. Here we demonstrate the genuine electric control of the spiral magnetic structure in one of such magnetic ferroelectrics, TbMnO3. A spin-polarized neutron scattering experiment clearly shows that the spin helicity, clockwise or counter-clockwise, is controlled by the direction of spontaneous polarization and hence by the polarity of the small cooling electric field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0701430v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0701430v1-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, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2007. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/0611255">arXiv:cond-mat/0611255</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0611255">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0611255">ps</a>, <a href="https://arxiv.org/format/cond-mat/0611255">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.75.100403">10.1103/PhysRevB.75.100403 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Impurity-doping induced ferroelectricity in frustrated antiferromagnet CuFeO2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Seki%2C+S">S. Seki</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Shiomi%2C+Y">Y. Shiomi</a>, <a href="/search/cond-mat?searchtype=author&query=Iguchi%2C+S">S. Iguchi</a>, <a href="/search/cond-mat?searchtype=author&query=Onose%2C+Y">Y. Onose</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="cond-mat/0611255v1-abstract-short" style="display: inline;"> Dielectric responses have been investigated on the triangular-lattice antiferromagnet CuFeO2 and its site-diluted analogs CuFe1-xAlxO2 (x=0.01 and 0.02) with and without application of magnetic field. We have found a ferroelectric behavior at zero magnetic field for x=0.02. At any doping level, the onset field of the ferroelectricity always coincides with that of the noncollinear magnetic struct… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0611255v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0611255v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0611255v1-abstract-full" style="display: none;"> Dielectric responses have been investigated on the triangular-lattice antiferromagnet CuFeO2 and its site-diluted analogs CuFe1-xAlxO2 (x=0.01 and 0.02) with and without application of magnetic field. We have found a ferroelectric behavior at zero magnetic field for x=0.02. At any doping level, the onset field of the ferroelectricity always coincides with that of the noncollinear magnetic structure while the transition field dramatically decreases to zero field with Al doping. The results imply the further possibility of producing the ferroelectricity by modifying the frustrated spin structure in terms of site-doping and external magnetic field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0611255v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0611255v1-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 November, 2006; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2006. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 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/cond-mat/0508580">arXiv:cond-mat/0508580</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0508580">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0508580">ps</a>, <a href="https://arxiv.org/format/cond-mat/0508580">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"> Change in lattice modulation upon gigantic magnetoelectric transition in GdMnO3 and TbMnO3 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Arima%2C+T">T. Arima</a>, <a href="/search/cond-mat?searchtype=author&query=Goto%2C+T">T. Goto</a>, <a href="/search/cond-mat?searchtype=author&query=Yamasaki%2C+Y">Y. Yamasaki</a>, <a href="/search/cond-mat?searchtype=author&query=Miyasaka%2C+S">S. Miyasaka</a>, <a href="/search/cond-mat?searchtype=author&query=Ishii%2C+K">K. Ishii</a>, <a href="/search/cond-mat?searchtype=author&query=Tsubota%2C+M">M. Tsubota</a>, <a href="/search/cond-mat?searchtype=author&query=Inami%2C+T">T. Inami</a>, <a href="/search/cond-mat?searchtype=author&query=Murakami%2C+Y">Y. Murakami</a>, <a href="/search/cond-mat?searchtype=author&query=Tokura%2C+Y">Y. Tokura</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="cond-mat/0508580v1-abstract-short" style="display: inline;"> Single-crystal synchrotron x-ray diffraction measurements in strong magnetic fields have been performed for magnetoelectric compounds GdMnO3 and TbMnO3. It has been found that the P || a ferroelectric phase induced by the application of a magnetic field at low temperatures is characterized by commensurate lattice modulation along the orthorhombic b axis with q = 1/2 and q = 1/4. The lattice modu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0508580v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0508580v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0508580v1-abstract-full" style="display: none;"> Single-crystal synchrotron x-ray diffraction measurements in strong magnetic fields have been performed for magnetoelectric compounds GdMnO3 and TbMnO3. It has been found that the P || a ferroelectric phase induced by the application of a magnetic field at low temperatures is characterized by commensurate lattice modulation along the orthorhombic b axis with q = 1/2 and q = 1/4. The lattice modulation is ascribed to antiferromagnetic spin alignment with a modulation vector of (0 1/4 1). The change of the spin structure is directly correlated with the magnetic-field-induced electric phase transition, because any commensurate spin modulation with (0 1/4 1) should break glide planes normal to the a axis of the distorted perovskite with the Pbnm space group. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0508580v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0508580v1-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 August, 2005; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2005. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">4 pages, 4 figures</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" 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