Spin and orbital excitations through the metal-to-insulator transition in Cd_2Os_2O_7 probed with high-resolution resonant inelastic x-ray scattering

J. G. Vale; S. Calder; N. A. Bogdanov; C. Donnerer; M. Moretti Sala; N. R. Davies; D. Mandrus; J. van den Brink; A. D. Christianson; D. F. McMorrow

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Spin and orbital excitations through the metal-to-insulator transition in Cd_2Os_2O_7 probed with high-resolution resonant inelastic x-ray scattering

机译：通过CD_2OS_2O_7中的金属到绝缘体过渡旋转和轨道激发，用高分辨率共振无弹性X射线散射探测

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High-resolution resonant inelastic x-ray scattering measurements (△E = 46 meV) have been performed on Cd_2Os_2O_7 through the metal-to-insulator transition (MIT). A magnetic excitation at 125 meV evolves continuously through the MIT, in agreement with recent Raman-scattering results, and provides further confirmation for an all-in all-out magnetic ground state. Asymmetry of this feature is likely a result of coupling between the electronic and the magnetic degrees of freedom. We also observe a broad continuum of interband excitations centered at 0.3 eV energy loss. This is indicative of significant hybridization between Os 5d and O 2p states and the concurrent itinerant nature of the system. In turn, this suggests a possible breakdown of the free-ion model for Cd-2Os_2O_7.

机译：通过金属到绝缘体转换（MIT）对CD_2OS_2O_7进行了高分辨率共振无弹性X射线散射测量（△E= 46meV）。 125 MeV的磁激发连续通过麻省理工学院演变，同时与最近的拉曼散射结果一致，并提供进一步确认全能的全外磁场状态。该特征的不对称可能是电子和磁度自由度之间的耦合的结果。我们还观察到以0.3 EV能量损失为中心的广泛的基间激励。这表明OS 5D和O 2P状态之间的显着杂交以及系统的并行潮流性质。反过来，这表明CD-2S_2O_7的自由离子模型可能分解。

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《Physical review》 |2020年第1期|014441.1-014441.10|共10页
作者
J. G. Vale; S. Calder; N. A. Bogdanov; C. Donnerer; M. Moretti Sala; N. R. Davies; D. Mandrus; J. van den Brink; A. D. Christianson; D. F. McMorrow;
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London Centre for Nanotechnology University College London (UCL) Gower Street London WCIE 6BT United Kingdom Laboratory for Quantum Magnetism Ecole Polytechnique Federate de Lausanne (EPFL) CH-1015 Switzerland;

Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA;

Institute for Theoretical Solid State Physics IFW Dresden D01171 Dresden Germany Max Planck Institute for Solid State Research Heisenbergstraβe 1 70569 Stuttgart Germany;

London Centre for Nanotechnology University College London (UCL) Gower Street London WCIE 6BT United Kingdom;

European Synchrotron Radiation Facility (ESRF) CS 40220 F-38043 Grenoble Cedex France Department of Physics Politechnico di Milano Piazza Leonardo da Vinci 32 20133 Milano Italy;

Clarendon Laboratory University of Oxford Parks Road Oxford OXI 3PU United Kingdom;

Department of Materials Science and Engineering University of Tennessee Knoxville Tennessee 37996 USA Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA;

Institute for Theoretical Solid State Physics IFW Dresden D01171 Dresden Germany;

Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Department of Physics and Astronomy University of Tennessee Knoxville Tennessee 37996 USA;

London Centre for Nanotechnology University College London (UCL) Gower Street London WCIE 6BT United Kingdom;

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2. Theory of resonant inelastic x-ray scattering in iridium oxide compounds: Probing spin-orbit-entangled ground states and excitations [J] . Luuk J. P. Ament, Giniyat Khaliullin, Jeroen van den Brink Physical review . 2011,第2期

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7. Spin and orbital excitations through the metal-to-insulator transition in Cd2Os2O7 probed with high-resolution resonant inelastic x-ray scattering [O] . J. G. Vale, S. Calder, N. A. Bogdanov, 2020

机译：通过CD2OS2O7中的金属对绝缘体过渡旋转和轨道激发，用高分辨率共振无弹性X射线散射探测
8. Uncovering Selective Excitations using the Resonant Profile of Indirect Inelastic X-Ray Scattering in Correlated Materials: Observing Two-Magnon Scattering and Relation to the Dynamical Structure Factor. [R] . Jia, C. J., Chen, C. C., Sorini, A. P., 2012

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Spin and orbital excitations through the metal-to-insulator transition in Cd_2Os_2O_7 probed with high-resolution resonant inelastic x-ray scattering

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