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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/2407.07984">arXiv:2407.07984</a> <span> [<a href="https://arxiv.org/pdf/2407.07984">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Pseudosymmetry in Tetragonal Perovskite SrIrO$_3$ Synthesized under High Pressure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Wang%2C+H">Haozhe Wang</a>, <a href="/search/cond-mat?searchtype=author&query=de+la+Torre%2C+A">Alberto de la Torre</a>, <a href="/search/cond-mat?searchtype=author&query=Race%2C+J+T">Joseph T. Race</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+Q">Qiaochu Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Ruff%2C+J+P+C">Jacob P. C. Ruff</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">Patrick M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Plumb%2C+K+W">Kemp W. Plumb</a>, <a href="/search/cond-mat?searchtype=author&query=Walker%2C+D">David Walker</a>, <a href="/search/cond-mat?searchtype=author&query=Xie%2C+W">Weiwei Xie</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.07984v1-abstract-short" style="display: inline;"> In this study, we report a tetragonal perovskite structure of SrIrO$_3$ (P4/mmm, a = 3.9362(9) 脜, c = 7.880(3) 脜) synthesized at 6 GPa and 1400 $掳$C, employing the ambient pressure monoclinic SrIrO$_3$ with distorted 6H structure as a precursor. The crystal structure of tetragonal SrIrO3 was evaluated on the basis of single crystal and powder X-ray diffraction. A cubic indexing was observed attrib… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.07984v1-abstract-full').style.display = 'inline'; document.getElementById('2407.07984v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.07984v1-abstract-full" style="display: none;"> In this study, we report a tetragonal perovskite structure of SrIrO$_3$ (P4/mmm, a = 3.9362(9) 脜, c = 7.880(3) 脜) synthesized at 6 GPa and 1400 $掳$C, employing the ambient pressure monoclinic SrIrO$_3$ with distorted 6H structure as a precursor. The crystal structure of tetragonal SrIrO3 was evaluated on the basis of single crystal and powder X-ray diffraction. A cubic indexing was observed attributed to overlooked superlattice reflections. Weak fractional peaks in the H and K dimensions suggest possible structure modulation by oxygen defects. Magnetization study reveals weak paramagnetic behavior down to 2 K, indicative of the interplay between spin-orbit coupling, electron correlations, and crystal electric field. Additionally, measurements of electrical resistivity display metallic behavior with an upturn at about 54 K, ascribed to weak electron localization and possible structural defects. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.07984v1-abstract-full').style.display = 'none'; document.getElementById('2407.07984v1-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 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">31 pages, 12 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/2405.12950">arXiv:2405.12950</a> <span> [<a href="https://arxiv.org/pdf/2405.12950">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Emergent Ferromagnetism at LaFeO3/SrTiO3 Interface Arising from Strain-induced Spin-State Transition </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Zhu%2C+M">Menglin Zhu</a>, <a href="/search/cond-mat?searchtype=author&query=Lanier%2C+J">Joseph Lanier</a>, <a href="/search/cond-mat?searchtype=author&query=Genlik%2C+S+P">Sevim Polat Genlik</a>, <a href="/search/cond-mat?searchtype=author&query=Flores%2C+J+G">Jose G. Flores</a>, <a href="/search/cond-mat?searchtype=author&query=Barbosa%2C+V+d+C+P">Victor da Cruz Pinha Barbosa</a>, <a href="/search/cond-mat?searchtype=author&query=Randeria%2C+M">Mohit Randeria</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">Patrick M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Ghazisaeidi%2C+M">Maryam Ghazisaeidi</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+F">Fengyuan Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Hwang%2C+J">Jinwoo Hwang</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2405.12950v1-abstract-short" style="display: inline;"> Creating new interfacial magnetic states with desired functionalities is attractive for fundamental studies and spintronics applications. The emergence of interfacial magnetic phases demands the fabrication of pristine interfaces and the characterization and understanding of atomic structure as well as electronic, magnetic, and orbital degrees of freedom at the interface. Here, we report a novel i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.12950v1-abstract-full').style.display = 'inline'; document.getElementById('2405.12950v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.12950v1-abstract-full" style="display: none;"> Creating new interfacial magnetic states with desired functionalities is attractive for fundamental studies and spintronics applications. The emergence of interfacial magnetic phases demands the fabrication of pristine interfaces and the characterization and understanding of atomic structure as well as electronic, magnetic, and orbital degrees of freedom at the interface. Here, we report a novel interfacial insulating ferromagnetic order in antiferromagnetic LaFeO3 grown on SrTiO3, characterized by a combination of electron microscopy and spectroscopy, magnetometry, and density functional theory. The epitaxial strain drives a spin-state disproportionation in the interfacial layer of LaFeO3, which leads to a checkerboard arrangement of low- and high-spin Fe3+ ions inside smaller and larger FeO6 octahedra, respectively. Ferromagnetism at the interface arises from superexchange interactions between the low- and high-spin Fe3+. The detailed understanding of creation of emergent magnetism illustrates the potential of designing and controlling orbital degrees of freedom at the interface to realize novel phases and functionalities for future spin-electronic applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.12950v1-abstract-full').style.display = 'none'; document.getElementById('2405.12950v1-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 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.12035">arXiv:2401.12035</a> <span> [<a href="https://arxiv.org/pdf/2401.12035">pdf</a>, <a href="https://arxiv.org/format/2401.12035">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.133.066501">10.1103/PhysRevLett.133.066501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The origin of magnetism in a supposedly nonmagnetic osmium oxide </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Agrestini%2C+S">S. Agrestini</a>, <a href="/search/cond-mat?searchtype=author&query=Borgatti%2C+F">F. Borgatti</a>, <a href="/search/cond-mat?searchtype=author&query=Florio%2C+P">P. Florio</a>, <a href="/search/cond-mat?searchtype=author&query=Frassineti%2C+J">J. Frassineti</a>, <a href="/search/cond-mat?searchtype=author&query=Mosca%2C+D+F">D. Fiore Mosca</a>, <a href="/search/cond-mat?searchtype=author&query=Faure%2C+Q">Q. Faure</a>, <a href="/search/cond-mat?searchtype=author&query=Detlefs%2C+B">B. Detlefs</a>, <a href="/search/cond-mat?searchtype=author&query=Sahle%2C+C+J">C. J. Sahle</a>, <a href="/search/cond-mat?searchtype=author&query=Francoual%2C+S">S. Francoual</a>, <a href="/search/cond-mat?searchtype=author&query=Choi%2C+J">J. Choi</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia-Fernandez%2C+M">M. Garcia-Fernandez</a>, <a href="/search/cond-mat?searchtype=author&query=Zhou%2C+K+-">K. -J. Zhou</a>, <a href="/search/cond-mat?searchtype=author&query=Mitrovic%2C+V+F">V. F. Mitrovic</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Ghiringhelli%2C+G">G. Ghiringhelli</a>, <a href="/search/cond-mat?searchtype=author&query=Franchini%2C+C">C. Franchini</a>, <a href="/search/cond-mat?searchtype=author&query=Boscherini%2C+F">F. Boscherini</a>, <a href="/search/cond-mat?searchtype=author&query=Sanna%2C+S">S. Sanna</a>, <a href="/search/cond-mat?searchtype=author&query=Sala%2C+a+M+M">and M. Moretti Sala</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.12035v1-abstract-short" style="display: inline;"> A supposedly nonmagnetic 5d$^1$ double perosvkite oxide is investigated by a combination of spectroscopic and theoretical methods, namely resonant inelastic X-ray scattering, X-ray absorption spectroscopy, magnetic circular dichroism, and multiplet ligand field calculations. We found that the large spin-orbit coupling admixes the 5d $t_{2g}$ and $e_g$ orbitals, covalency raises the 5d population w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12035v1-abstract-full').style.display = 'inline'; document.getElementById('2401.12035v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.12035v1-abstract-full" style="display: none;"> A supposedly nonmagnetic 5d$^1$ double perosvkite oxide is investigated by a combination of spectroscopic and theoretical methods, namely resonant inelastic X-ray scattering, X-ray absorption spectroscopy, magnetic circular dichroism, and multiplet ligand field calculations. We found that the large spin-orbit coupling admixes the 5d $t_{2g}$ and $e_g$ orbitals, covalency raises the 5d population well above the nominal value, and the local symmetry is lower than $O_h$. The obtained electronic interactions account for the finite magnetic moment of Os in this compound and, in general, of 5d$^1$ ions. Our results provide direct evidence of elusive Jahn-Teller distortions, hinting at a strong electron-lattice coupling. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.12035v1-abstract-full').style.display = 'none'; document.getElementById('2401.12035v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 133, 066501 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.15757">arXiv:2306.15757</a> <span> [<a href="https://arxiv.org/pdf/2306.15757">pdf</a>, <a href="https://arxiv.org/format/2306.15757">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/s41467-024-46621-0">10.1038/s41467-024-46621-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin-orbital Jahn-Teller bipolarons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Celiberti%2C+L">Lorenzo Celiberti</a>, <a href="/search/cond-mat?searchtype=author&query=Mosca%2C+D+F">Dario Fiore Mosca</a>, <a href="/search/cond-mat?searchtype=author&query=Allodi%2C+G">Giuseppe Allodi</a>, <a href="/search/cond-mat?searchtype=author&query=Pourovskii%2C+L+V">Leonid V. Pourovskii</a>, <a href="/search/cond-mat?searchtype=author&query=Tassetti%2C+A">Anna Tassetti</a>, <a href="/search/cond-mat?searchtype=author&query=Forino%2C+P+C">Paola Caterina Forino</a>, <a href="/search/cond-mat?searchtype=author&query=Cong%2C+R">Rong Cong</a>, <a href="/search/cond-mat?searchtype=author&query=Garcia%2C+E">Erick Garcia</a>, <a href="/search/cond-mat?searchtype=author&query=Tran%2C+P+M">Phuong M. Tran</a>, <a href="/search/cond-mat?searchtype=author&query=De+Renzi%2C+R">Roberto De Renzi</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">Patrick M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Mitrovi%C4%87%2C+V+F">Vesna F. Mitrovi膰</a>, <a href="/search/cond-mat?searchtype=author&query=Sanna%2C+S">Samuele Sanna</a>, <a href="/search/cond-mat?searchtype=author&query=Franchini%2C+C">Cesare Franchini</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2306.15757v1-abstract-short" style="display: inline;"> Polarons and spin-orbit (SO) coupling are distinct quantum effects that play a critical role in charge transport and spin-orbitronics. Polarons originate from strong electron-phonon interaction and are ubiquitous in polarizable materials featuring electron localization, in particular $\mathrm{3d}$ transition metal oxides (TMOs). On the other hand, the relativistic coupling between the spin and orb… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.15757v1-abstract-full').style.display = 'inline'; document.getElementById('2306.15757v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.15757v1-abstract-full" style="display: none;"> Polarons and spin-orbit (SO) coupling are distinct quantum effects that play a critical role in charge transport and spin-orbitronics. Polarons originate from strong electron-phonon interaction and are ubiquitous in polarizable materials featuring electron localization, in particular $\mathrm{3d}$ transition metal oxides (TMOs). On the other hand, the relativistic coupling between the spin and orbital angular momentum is notable in lattices with heavy atoms and develops in $\mathrm{5d}$ TMOs, where electrons are spatially delocalized. Here we combine ab initio calculations and magnetic measurements to show that these two seemingly mutually exclusive interactions are entangled in the electron-doped SO-coupled Mott insulator $\mathrm{Ba_2Na_{1-x}Ca_xOsO_6}$ ($0< x < 1$), unveiling the formation of spin-orbital bipolarons. Polaron charge trapping, favoured by the Jahn-Teller lattice activity, converts the Os $\mathrm{5d^1}$ spin-orbital $\mathrm{J_{eff}=3/2}$ levels, characteristic of the parent compound $\mathrm{Ba_2NaOsO_6}$ (BNOO), into a bipolaron $\mathrm{5d^2}$ $\mathrm{J_{eff}=2}$ manifold, leading to the coexistence of different J-effective states in a single-phase material. The gradual increase of bipolarons with increasing doping creates robust in-gap states that prevents the transition to a metal phase even at ultrahigh doping, thus preserving the Mott gap across the entire doping range from $\mathrm{d^1}$ BNOO to $\mathrm{d^2}$ $\mathrm{Ba_2CaOsO_6}$ (BCOO). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.15757v1-abstract-full').style.display = 'none'; document.getElementById('2306.15757v1-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 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.05077">arXiv:2210.05077</a> <span> [<a href="https://arxiv.org/pdf/2210.05077">pdf</a>, <a href="https://arxiv.org/format/2210.05077">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/PhysRevMaterials.7.084409">10.1103/PhysRevMaterials.7.084409 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Effects of charge doping on Mott insulator with strong spin-orbit coupling, Ba$_2$NaOsO$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Garcia%2C+E">E. Garcia</a>, <a href="/search/cond-mat?searchtype=author&query=Cong%2C+R">R. Cong</a>, <a href="/search/cond-mat?searchtype=author&query=Forino%2C+P+C">P. C. Forino</a>, <a href="/search/cond-mat?searchtype=author&query=Tassetti%2C+A">A. Tassetti</a>, <a href="/search/cond-mat?searchtype=author&query=Allodi%2C+G">G. Allodi</a>, <a href="/search/cond-mat?searchtype=author&query=Reyes%2C+A+P">A. P. Reyes</a>, <a href="/search/cond-mat?searchtype=author&query=Tran%2C+P+M">P. M. Tran</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Franchini%2C+C">C. Franchini</a>, <a href="/search/cond-mat?searchtype=author&query=Sanna%2C+S">S. Sanna</a>, <a href="/search/cond-mat?searchtype=author&query=Mitrovi%C4%87%2C+V+F">V. F. Mitrovi膰</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="2210.05077v2-abstract-short" style="display: inline;"> The effects of doping on the electronic evolution of the Mott insulating state have been extensively studied in efforts to understand mechanisms of emergent quantum phases of materials. The study of these effects becomes ever more intriguing in the presence of entanglement between spin and orbital degrees of freedom. Here, we present a comprehensive investigation of charge doping in the double per… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.05077v2-abstract-full').style.display = 'inline'; document.getElementById('2210.05077v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.05077v2-abstract-full" style="display: none;"> The effects of doping on the electronic evolution of the Mott insulating state have been extensively studied in efforts to understand mechanisms of emergent quantum phases of materials. The study of these effects becomes ever more intriguing in the presence of entanglement between spin and orbital degrees of freedom. Here, we present a comprehensive investigation of charge doping in the double perovskite Ba$_2$NaOsO$_6$, a a complex Mott insulator where such entanglement plays an important role. We establish that the insulating magnetic ground state evolves from canted antiferromagnet (cAF)to N茅el order for dopant levels exceeding ~ 10 %. Furthermore, we determine that a broken local point symmetry (BLPS) phase, precursor to the magnetically ordered state, occupies an extended portion of the (H-T) phase diagram with increased doping. This finding reveals that the breaking of the local cubic symmetry is driven by a multipolar order, most-likely of the antiferro-quadrupolar type. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.05077v2-abstract-full').style.display = 'none'; document.getElementById('2210.05077v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1805.00543">arXiv:1805.00543</a> <span> [<a href="https://arxiv.org/pdf/1805.00543">pdf</a>, <a href="https://arxiv.org/format/1805.00543">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.98.214422">10.1103/PhysRevB.98.214422 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Origin of magnetic excitation gap in double perovskite Sr$_2$FeOsO$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Taylor%2C+A+E">A. E. Taylor</a>, <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">R. Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Lumsden%2C+M+D">M. D. Lumsden</a>, <a href="/search/cond-mat?searchtype=author&query=Calder%2C+S">S. Calder</a>, <a href="/search/cond-mat?searchtype=author&query=Upton%2C+M+H">M. H. Upton</a>, <a href="/search/cond-mat?searchtype=author&query=Kolesnikov%2C+A+I">A. I. Kolesnikov</a>, <a href="/search/cond-mat?searchtype=author&query=Stone%2C+M+B">M. B. Stone</a>, <a href="/search/cond-mat?searchtype=author&query=Fishman%2C+R+S">R. S. Fishman</a>, <a href="/search/cond-mat?searchtype=author&query=Paramekanti%2C+A">A. Paramekanti</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Christianson%2C+A+D">A. D. Christianson</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="1805.00543v1-abstract-short" style="display: inline;"> Sr$_2$FeOsO$_6$ is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 K ($T_{N1}$) and 67 K ($T_{N2}$). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr$_2$FeOsO$_6$. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.00543v1-abstract-full').style.display = 'inline'; document.getElementById('1805.00543v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1805.00543v1-abstract-full" style="display: none;"> Sr$_2$FeOsO$_6$ is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 K ($T_{N1}$) and 67 K ($T_{N2}$). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr$_2$FeOsO$_6$. The INS data reveal that the spectrum of spin excitations remains ungapped below T$_{N1}$, however below T$_{N2}$ a gap of 6.8 meV develops. The RIXS data reveals splitting of the T$_{2g}$ multiplet consistent with that seen in other 5d$^3$ osmium based double perovskites. Together these results suggest that spin-orbit coupling is important for ground state selection in 3d-5d$^3$ double perovskite materials. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1805.00543v1-abstract-full').style.display = 'none'; document.getElementById('1805.00543v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 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">5 figures, supplementary material available on request</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 98, 214422 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1610.02375">arXiv:1610.02375</a> <span> [<a href="https://arxiv.org/pdf/1610.02375">pdf</a>, <a href="https://arxiv.org/format/1610.02375">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.118.207202">10.1103/PhysRevLett.118.207202 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin-orbit coupling controlled $J=3/2$ electronic ground state in 5$d^{3}$ oxides </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Taylor%2C+A+E">A. E. Taylor</a>, <a href="/search/cond-mat?searchtype=author&query=Calder%2C+S">S. Calder</a>, <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">R. Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+H+L">H. L. Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Upton%2C+M+H">M. H. Upton</a>, <a href="/search/cond-mat?searchtype=author&query=Lumsden%2C+M+D">M. D. Lumsden</a>, <a href="/search/cond-mat?searchtype=author&query=Yamaura%2C+K">K. Yamaura</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Christianson%2C+A+D">A. D. Christianson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1610.02375v1-abstract-short" style="display: inline;"> Entanglement of spin and orbital degrees of freedom drives the formation of novel quantum and topological physical states. Discovering new spin-orbit entangled ground states and emergent phases of matter requires both experimentally probing the relevant energy scales and applying suitable theoretical models. Here we report resonant inelastic x-ray scattering measurements of the transition metal ox… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02375v1-abstract-full').style.display = 'inline'; document.getElementById('1610.02375v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1610.02375v1-abstract-full" style="display: none;"> Entanglement of spin and orbital degrees of freedom drives the formation of novel quantum and topological physical states. Discovering new spin-orbit entangled ground states and emergent phases of matter requires both experimentally probing the relevant energy scales and applying suitable theoretical models. Here we report resonant inelastic x-ray scattering measurements of the transition metal oxides Ca$_3$LiOsO$_6$ and Ba$_2$YOsO$_6$. We invoke an intermediate coupling approach that incorporates both spin-orbit coupling and electron-electron interactions on an even footing and reveal the ground state of $5d^3$ based compounds, which has remained elusive in previously applied models, is a novel spin-orbit entangled J=3/2 electronic ground state. This work reveals the hidden diversity of spin-orbit controlled ground states in 5d systems and introduces a new arena in the search for spin-orbit controlled phases of matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1610.02375v1-abstract-full').style.display = 'none'; document.getElementById('1610.02375v1-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 October, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">main text plus supplemental information</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 118, 207202 (2017) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1606.03231">arXiv:1606.03231</a> <span> [<a href="https://arxiv.org/pdf/1606.03231">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/srep32462">10.1038/srep32462 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin-orbit coupling control of anisotropy, ground state and frustration in 5d2 Sr2MgOsO6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">Ryan Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Taylor%2C+A+E">Alice E. Taylor</a>, <a href="/search/cond-mat?searchtype=author&query=Singh%2C+D+J">D. J. Singh</a>, <a href="/search/cond-mat?searchtype=author&query=Xiong%2C+J">Jie Xiong</a>, <a href="/search/cond-mat?searchtype=author&query=Rodan%2C+S">Steven Rodan</a>, <a href="/search/cond-mat?searchtype=author&query=Wolter%2C+A+U+B">A. U. B. Wolter</a>, <a href="/search/cond-mat?searchtype=author&query=Wurmehl%2C+S">Sabine Wurmehl</a>, <a href="/search/cond-mat?searchtype=author&query=B%C3%BCchner%2C+B">Bernd B眉chner</a>, <a href="/search/cond-mat?searchtype=author&query=Stone%2C+M+B">M. B. Stone</a>, <a href="/search/cond-mat?searchtype=author&query=Kolesnikov%2C+A+I">A. I. Kolesnikov</a>, <a href="/search/cond-mat?searchtype=author&query=Aczel%2C+A+A">Adam A. Aczel</a>, <a href="/search/cond-mat?searchtype=author&query=Christianson%2C+A+D">A. D. Christianson</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">Patrick M. Woodward</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="1606.03231v1-abstract-short" style="display: inline;"> The influence of spin-orbit coupling (SOC) on the physical properties of the 5d2 system Sr2MgOsO6 is probed via a combination of magnetometry, specific heat measurements, elastic and inelastic neutron scattering, and density functional theory calculations. Although a significant degree of frustration is expected, we find that Sr2MgOsO6 orders in a type I antiferromagnetic structure at the remarkab… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.03231v1-abstract-full').style.display = 'inline'; document.getElementById('1606.03231v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1606.03231v1-abstract-full" style="display: none;"> The influence of spin-orbit coupling (SOC) on the physical properties of the 5d2 system Sr2MgOsO6 is probed via a combination of magnetometry, specific heat measurements, elastic and inelastic neutron scattering, and density functional theory calculations. Although a significant degree of frustration is expected, we find that Sr2MgOsO6 orders in a type I antiferromagnetic structure at the remarkably high temperature of 108 K. The measurements presented allow for the first accurate quantification of the size of the magnetic moment in a 5d2 system of 0.60(2) muB - a significantly reduced moment from the expected value for such a system. Furthermore, significant anisotropy is identified via a spin excitation gap, and we confirm by first principles calculations that SOC not only provides the magnetocrystalline anisotropy, but also plays a crucial role in determining both the ground state magnetic order and the size of the local moment in this compound. Through comparison to Sr2ScOsO6, it is demonstrated that SOC-induced anisotropy has the ability to relieve frustration in 5d2 systems relative to their 5d3 counterparts, providing an explanation of the high TN found in Sr2MgOsO6. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.03231v1-abstract-full').style.display = 'none'; document.getElementById('1606.03231v1-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 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Submitted to Scientific Reports</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Scientific Reports 6, Article number: 32462 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1511.07486">arXiv:1511.07486</a> <span> [<a href="https://arxiv.org/pdf/1511.07486">pdf</a>, <a href="https://arxiv.org/format/1511.07486">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.93.220408">10.1103/PhysRevB.93.220408 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin-orbit coupling controlled ground state in Sr$_2$ScOsO$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Taylor%2C+A+E">A. E. Taylor</a>, <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">R. Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Fishman%2C+R+S">R. S. Fishman</a>, <a href="/search/cond-mat?searchtype=author&query=Calder%2C+S">S. Calder</a>, <a href="/search/cond-mat?searchtype=author&query=Kolesnikov%2C+A+I">A. I. Kolesnikov</a>, <a href="/search/cond-mat?searchtype=author&query=Lumsden%2C+M+D">M. D. Lumsden</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Christianson%2C+A+D">A. D. Christianson</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="1511.07486v3-abstract-short" style="display: inline;"> We report neutron scattering experiments which reveal a large spin gap in the magnetic excitation spectrum of weakly-monoclinic double perovskite Sr2ScOsO6. The spin gap is demonstrative of appreciable spin-orbit-induced anisotropy, despite nominally orbitally-quenched 5d3 Os5+ ions. The system is successfully modeled including nearest neighbor interactions in a Heisenberg Hamiltonian with exchang… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.07486v3-abstract-full').style.display = 'inline'; document.getElementById('1511.07486v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1511.07486v3-abstract-full" style="display: none;"> We report neutron scattering experiments which reveal a large spin gap in the magnetic excitation spectrum of weakly-monoclinic double perovskite Sr2ScOsO6. The spin gap is demonstrative of appreciable spin-orbit-induced anisotropy, despite nominally orbitally-quenched 5d3 Os5+ ions. The system is successfully modeled including nearest neighbor interactions in a Heisenberg Hamiltonian with exchange anisotropy. We find that the presence of the spin-orbit-induced anisotropy is essential for the realization of the type I antiferromagnetic ground state. This demonstrates that physics beyond the LS or JJ coupling limits plays an active role in determining the collective properties of 4d3 and 5d3 systems, and that theoretical treatments must include spin-orbit coupling. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1511.07486v3-abstract-full').style.display = 'none'; document.getElementById('1511.07486v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 November, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">6 pages, 4 figures, 4 pages supplementary material</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 93, 220408 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.00901">arXiv:1509.00901</a> <span> [<a href="https://arxiv.org/pdf/1509.00901">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/10.1016/j.jssc.2016.02.025">10.1016/j.jssc.2016.02.025 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Effect of Chemical Pressure on High Temperature Ferrimagnetic Double Perovskites Sr2CrOsO6 and Ca2CrOsO6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">Ryan Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Soliz%2C+J+R">Jennifer R. Soliz</a>, <a href="/search/cond-mat?searchtype=author&query=Hauser%2C+A+J">Adam J. Hauser</a>, <a href="/search/cond-mat?searchtype=author&query=Gallagher%2C+J+C">James C. Gallagher</a>, <a href="/search/cond-mat?searchtype=author&query=Susner%2C+M+A">Michael A. Susner</a>, <a href="/search/cond-mat?searchtype=author&query=Sumption%2C+M+D">Michael D. Sumption</a>, <a href="/search/cond-mat?searchtype=author&query=Aczel%2C+A+A">Adam A. Aczel</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+J">Jiaqiang Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+F">Fengyuan Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">Patrick M. Woodward</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="1509.00901v1-abstract-short" style="display: inline;"> The ordered double perovskites Sr2CrOsO6 and Ca2CrOsO6 have been synthesized and characterized with neutron powder diffraction, electrical transport measurements, and high field magnetization experiments. Sr2CrOsO6 and Ca2CrOsO6 crystallize with R-3 and P21/n space group symmetry, respectively. Both materials are found to be ferrimagnetic insulators with saturation magnetizations near 0.2 渭B. Sr2C… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.00901v1-abstract-full').style.display = 'inline'; document.getElementById('1509.00901v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.00901v1-abstract-full" style="display: none;"> The ordered double perovskites Sr2CrOsO6 and Ca2CrOsO6 have been synthesized and characterized with neutron powder diffraction, electrical transport measurements, and high field magnetization experiments. Sr2CrOsO6 and Ca2CrOsO6 crystallize with R-3 and P21/n space group symmetry, respectively. Both materials are found to be ferrimagnetic insulators with saturation magnetizations near 0.2 渭B. Sr2CrOsO6 orders at 660 K, showing non-monotonic magnetization temperature dependence, while Ca2CrOsO6 orders at 490 K and does not show non-monotonic behavior. Evidence for a theoretically predicted canted magnetic structure in Sr2CrOsO6 is sought and not found. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.00901v1-abstract-full').style.display = 'none'; document.getElementById('1509.00901v1-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 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">18 pages and 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J Solid State Chem 238, 46-52 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1506.02052">arXiv:1506.02052</a> <span> [<a href="https://arxiv.org/pdf/1506.02052">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.92.134402">10.1103/PhysRevB.92.134402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetic Structure of the Quasi-One-Dimensional La3OsO7 as Determined by Neutron Powder Diffraction </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">Ryan Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Susner%2C+M+A">Michael A. Susner</a>, <a href="/search/cond-mat?searchtype=author&query=Sumption%2C+M+D">Michael D. Sumption</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">Patrick M. Woodward</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="1506.02052v2-abstract-short" style="display: inline;"> Insulating 5d3 La3OsO7 and hole doped La2.8Ca0.2OsO7 materials featuring well separated pseudo-one-dimensional zig-zag chains of corner-sharing OsO6 octahedra have been synthesized and their magnetic and electrical transport properties characterized. Long range magnetic order between the antiferromagnetic chains is determined with a propagation vector k = 1/2, 1/2, 0 and TN = 45 and 53 K for the p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1506.02052v2-abstract-full').style.display = 'inline'; document.getElementById('1506.02052v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1506.02052v2-abstract-full" style="display: none;"> Insulating 5d3 La3OsO7 and hole doped La2.8Ca0.2OsO7 materials featuring well separated pseudo-one-dimensional zig-zag chains of corner-sharing OsO6 octahedra have been synthesized and their magnetic and electrical transport properties characterized. Long range magnetic order between the antiferromagnetic chains is determined with a propagation vector k = 1/2, 1/2, 0 and TN = 45 and 53 K for the parent and doped materials. An Os5+ moment of 1.7(1) 渭B for La3OsO7 and 1.2(2) 渭B for La2.8Ca0.2OsO7 is refined. The long range magnetic structure is compared to the few currently known for isostructural Ln3MO7 compounds. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1506.02052v2-abstract-full').style.display = 'none'; document.getElementById('1506.02052v2-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 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 June, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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">15 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. B 92, 134402 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.01485">arXiv:1503.01485</a> <span> [<a href="https://arxiv.org/pdf/1503.01485">pdf</a>, <a href="https://arxiv.org/format/1503.01485">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.91.100406">10.1103/PhysRevB.91.100406 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetic order and electronic structure of 5d3 double perovskite Sr2ScOsO6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Taylor%2C+A+E">A. E. Taylor</a>, <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">R. Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Singh%2C+D+J">D. J. Singh</a>, <a href="/search/cond-mat?searchtype=author&query=Calder%2C+S">S. Calder</a>, <a href="/search/cond-mat?searchtype=author&query=Lumsden%2C+M+D">M. D. Lumsden</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Christianson%2C+A+D">A. D. Christianson</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="1503.01485v2-abstract-short" style="display: inline;"> The magnetic susceptibility, crystal and magnetic structures, and electronic structure of double perovskite Sr2ScOsO6 are reported. Using both neutron and x-ray powder diffraction we find that the crystal structure is monoclinic P21/n from 3.5 to 300 K. Magnetization measurements indicate an antiferromagnetic transition at TN=92K, one of the highest transition temperatures of any double perovskite… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.01485v2-abstract-full').style.display = 'inline'; document.getElementById('1503.01485v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.01485v2-abstract-full" style="display: none;"> The magnetic susceptibility, crystal and magnetic structures, and electronic structure of double perovskite Sr2ScOsO6 are reported. Using both neutron and x-ray powder diffraction we find that the crystal structure is monoclinic P21/n from 3.5 to 300 K. Magnetization measurements indicate an antiferromagnetic transition at TN=92K, one of the highest transition temperatures of any double perovskite hosting only one magnetic ion. Type I antiferromagnetic order is determined by neutron powder diffraction, with an Os moment of only 1.6(1) muB, close to half the spin-only value for a crystal field split 5d electron state with t2g^3 ground state. Density functional calculations show that this reduction is largely the result of strong Os-O hybridization, with spin-orbit coupling responsible for only a ~0.1 muB reduction in the moment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.01485v2-abstract-full').style.display = 'none'; document.getElementById('1503.01485v2-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 March, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 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">5 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 91, 100406(R) (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1503.00029">arXiv:1503.00029</a> <span> [<a href="https://arxiv.org/pdf/1503.00029">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/PhysRevB.92.094435">10.1103/PhysRevB.92.094435 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Effects of chemical pressure on the magnetic ground states of the osmate double perovskites SrCaCoOsO6 and Ca2CoOsO6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Morrow%2C+R">Ryan Morrow</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+J">Jiaqiang Yan</a>, <a href="/search/cond-mat?searchtype=author&query=McGuire%2C+M+A">Michael A. McGuire</a>, <a href="/search/cond-mat?searchtype=author&query=Freeland%2C+J+W">John W. Freeland</a>, <a href="/search/cond-mat?searchtype=author&query=Haskel%2C+D">Daniel Haskel</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">Patrick M. Woodward</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="1503.00029v3-abstract-short" style="display: inline;"> The magnetic ground state in the double perovskite system Sr2-xCaxCoOsO6 changes from an antiferromagnet (x = 0), to a spin glass (x = 1), to a ferrimagnet (x = 2) as the Ca content increases. This crossover is driven by chemical pressure effects that control the relative strength of magnetic exchange interactions. The synthesis, crystal structure, and magnetism of SrCaCoOsO6 and Ca2CoOsO6 are inv… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.00029v3-abstract-full').style.display = 'inline'; document.getElementById('1503.00029v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1503.00029v3-abstract-full" style="display: none;"> The magnetic ground state in the double perovskite system Sr2-xCaxCoOsO6 changes from an antiferromagnet (x = 0), to a spin glass (x = 1), to a ferrimagnet (x = 2) as the Ca content increases. This crossover is driven by chemical pressure effects that control the relative strength of magnetic exchange interactions. The synthesis, crystal structure, and magnetism of SrCaCoOsO6 and Ca2CoOsO6 are investigated and compared with Sr2CoOsO6. Both compounds adopt a monoclinic crystal structure with rock salt ordering of Co2+ and Os6+ and a-a-b+ octahedral tilting, but the average Co-O-Os bond angle evolves from 158.0(3) degrees in SrCaCoOsO6 to 150.54(9) degrees in Ca2CoOsO6 as the smaller Ca2+ ion replaces Sr2+. While this change may seem minor it has a profound effect on the magnetism, changing the magnetic ground state from antiferromagnetic in Sr2CoOsO6 (TN1 = 108 K, TN2 = 70 K), to a spin glass in SrCaCoOsO6 (Tf1 = 32 K, Tf2 = 13 K), to ferrimagnetic in Ca2CoOsO6 (TC = 145 K). In the first two compounds the observation of two transitions is consistent with weak coupling between the Co and Os sublattices. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1503.00029v3-abstract-full').style.display = 'none'; document.getElementById('1503.00029v3-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, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 February, 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">17 pages, 9 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 92, 094435 (2015) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1307.1816">arXiv:1307.1816</a> <span> [<a href="https://arxiv.org/pdf/1307.1816">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.111.247202">10.1103/PhysRevLett.111.247202 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Probing the Spin Pumping Mechanism: Exchange Coupling with Exponential Decay in Y3Fe5O12/barrier/Pt Heterostructures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Du%2C+C+H">C. H. Du</a>, <a href="/search/cond-mat?searchtype=author&query=Wang%2C+H+L">H. L. Wang</a>, <a href="/search/cond-mat?searchtype=author&query=Pu%2C+Y">Y. Pu</a>, <a href="/search/cond-mat?searchtype=author&query=Meyer%2C+T+L">T. L. Meyer</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Yang%2C+F+Y">F. Y. Yang</a>, <a href="/search/cond-mat?searchtype=author&query=Hammel%2C+P+C">P. C. Hammel</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="1307.1816v2-abstract-short" style="display: inline;"> Ferromagnetic resonance driven spin pumping of pure spin currents from a ferromagnet into a nonmagnetic material promises new spin-functional devices with low energy consumption. The mechanism of spin pumping is under intense investigation and it is widely believed that exchange interaction between the ferromagnet and nonmagnetic material is responsible for this phenomenon. We observe a thousand-f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.1816v2-abstract-full').style.display = 'inline'; document.getElementById('1307.1816v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1307.1816v2-abstract-full" style="display: none;"> Ferromagnetic resonance driven spin pumping of pure spin currents from a ferromagnet into a nonmagnetic material promises new spin-functional devices with low energy consumption. The mechanism of spin pumping is under intense investigation and it is widely believed that exchange interaction between the ferromagnet and nonmagnetic material is responsible for this phenomenon. We observe a thousand-fold exponential decay of the spin pumping from 20-nm thick Y3Fe5O12 films to platinum across insulating barriers, from which the exponential decay lengths of 0.16 and 0.23 nm are extracted for oxide barriers with band gaps of 4.93 eV and 2.36 eV, respectively. This prototypical signature of quantum tunneling through a barrier underscores the importance of exchange coupling for spin pumping and reveals its dependence on the characteristics of the barrier material. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1307.1816v2-abstract-full').style.display = 'none'; document.getElementById('1307.1816v2-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 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 July, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2013. </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 papges, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 111, 247202 (2013) </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/0303189">arXiv:cond-mat/0303189</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0303189">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0303189">ps</a>, <a href="https://arxiv.org/format/cond-mat/0303189">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/10.1088/0953-8984/16/44/007">10.1088/0953-8984/16/44/007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Temperature dependent total scattering structural study of CaCu3Ti4O12 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Bozin%2C+E+S">E. S. Bozin</a>, <a href="/search/cond-mat?searchtype=author&query=Petkov%2C+V">V. Petkov</a>, <a href="/search/cond-mat?searchtype=author&query=Barnes%2C+P+W">P. W. Barnes</a>, <a href="/search/cond-mat?searchtype=author&query=Woodward%2C+P+M">P. M. Woodward</a>, <a href="/search/cond-mat?searchtype=author&query=Vogt%2C+T">T. Vogt</a>, <a href="/search/cond-mat?searchtype=author&query=Mahanti%2C+S+D">S. D. Mahanti</a>, <a href="/search/cond-mat?searchtype=author&query=Billinge%2C+S+J+L">S. J. L. Billinge</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/0303189v1-abstract-short" style="display: inline;"> X-ray and neutron powder diffraction data as a function of temperature are analyzed for the colossal dielectric constant material CaCu3Ti4O12. The local structure is studied using atomic pair distribution function analysis. No evidence is found for enhanced oxygen displacement parameters suggesting that short-range octahedral tilt disorder is minimal. However, an unusual temperature dependence f… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0303189v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0303189v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0303189v1-abstract-full" style="display: none;"> X-ray and neutron powder diffraction data as a function of temperature are analyzed for the colossal dielectric constant material CaCu3Ti4O12. The local structure is studied using atomic pair distribution function analysis. No evidence is found for enhanced oxygen displacement parameters suggesting that short-range octahedral tilt disorder is minimal. However, an unusual temperature dependence for the atomic displacement parameters of calcium and copper is observed. Temperature dependent modeling of the structure, using bond valence concepts, suggests that the calcium atoms become underbonded below approximately 260 K, which provides a rationale for the unusually high Ca displacement parameters at low temperature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0303189v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0303189v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 March, 2003; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2003. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 7 figures</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 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