D
D. I. Khomskii
Researcher at University of Cologne
Publications - 163
Citations - 6197
D. I. Khomskii is an academic researcher from University of Cologne. The author has contributed to research in topics: Antiferromagnetism & Magnetization. The author has an hindex of 41, co-authored 156 publications receiving 5542 citations. Previous affiliations of D. I. Khomskii include University of Groningen & Laboratory of Solid State Physics.
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Intermediate-spin state and properties of LaCoO_3
TL;DR: The electronic structure of the perovskite LaCoO3 for different spin states of Co ions was calculated in the local-density approximation LDA+U approach and shows that Co 3d states of t(2g) symmetry form narrow bands which could easily localize, while e(g) orbitals, due to their strong hybridization with the oxygen 2p states, form a broad sigma* band.
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Orbital-Assisted Metal-Insulator Transition in VO2
Maurits W. Haverkort,Zhiwei Hu,Arata Tanaka,W. Reichelt,Sergey V. Streltsov,M. A. Korotin,V. I. Anisimov,H. H. Hsieh,Hong-Ji Lin,C. T. Chen,D. I. Khomskii,Liu Hao Tjeng +11 more
TL;DR: These results strongly suggest that, in going from the metallic to the insulating state, the orbital occupation changes in a manner that charge fluctuations and effective bandwidths are reduced, that the system becomes more one dimensional and more susceptible to a Peierls-like transition.
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Field-induced polar order at the Néel temperature of chromium in rare-earth orthochromites: Interplay of rare-earth and Cr magnetism
TL;DR: In this article, the authors reported field-induced switchable polar order in rare-earth orthochromites, showing that the polar order occurs in weakly ferromagnetic (FeO)-orthochromite orthochrome, but only when the rare earth ion is magnetic.
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Spin-state transition in LaCoO3: direct neutron spectroscopic evidence of excited magnetic states.
Andrey Podlesnyak,S. Streule,Joël Mesot,Marisa Medarde,Ekaterina Pomjakushina,Kazimierz Conder,Arata Tanaka,Maurits W. Haverkort,D. I. Khomskii +8 more
TL;DR: This work interprets an excitation in LaCoO3 as originating from a transition between thermally excited states located about 120 K above the ground state, and discusses the nature of the magnetic excited state in terms of intermediate-spin versus high-spin states.
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Thermoelectric power of HoBaCo2O5.5: Possible evidence of the spin blockade in cobaltites
TL;DR: Thermoelectric power measurements have been performed for an ordered oxygen-deficient perovskite, HoBaCo2O5.5, in which the alternative layers of CoO6 octahedra and of [CoO(5)](2) bipyramids are occupied by Co3+ species.