Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/103181
Title: Orbital Effects in Solids: Basics, Recent Progress, and Opportunities
Authors: Khomskii, D. I.
Streltsov, S. V.
Issue Date: 2021
Publisher: American Chemical Society
Citation: Khomskii D. I. Orbital Effects in Solids: Basics, Recent Progress, and Opportunities / D. I. Khomskii, S. V. Streltsov. — DOI 10.1021/acs.chemrev.0c00579 // Chemical Reviews. — 2021. — Vol. 121. — Iss. 5. — P. 2992-3030.
Abstract: The properties of transition metal compounds are largely determined by nontrivial interplay of different degrees of freedom: charge, spin, lattice, and also orbital ones. Especially rich and interesting effects occur in systems with orbital degeneracy. For example, they result in the famous Jahn-Teller effect, leading to a plethora of consequences for static and dynamic properties, including nontrivial quantum effects. In the present review, we discuss the main phenomena in the physics of such systems, paying central attention to the novel manifestations of those. After shortly summarizing the basic phenomena and their descriptions, we concentrate on several specific directions in this field. One of them is the reduction of effective dimensionality in many systems with orbital degrees of freedom due to the directional character of orbitals, with the concomitant appearance of some instabilities that lead in particular to the formation of dimers, trimers, and similar clusters in a material. The properties of such cluster systems, which are largely determined by their orbital structure, are discussed in detail, and many specific examples of those in different materials are presented. Another big field that has acquired special significance relatively recently is the role of the relativistic spin-orbit interaction. The mutual influence of this interaction and the more traditional Jahn-Teller physics is treated in detail in the second part of the review. In discussing all of these questions, special attention is paid to novel quantum effects. © 2021 American Chemical Society. All rights reserved.
Keywords: DEGREES OF FREEDOM (MECHANICS)
DIMENSIONALITY REDUCTION
DIMERS
JAHN-TELLER EFFECT
PRECIOUS METAL COMPOUNDS
QUANTUM THEORY
REFRACTORY METAL COMPOUNDS
RELATIVITY
TRANSITION METALS
CLUSTER SYSTEMS
DYNAMIC PROPERTY
ORBITAL DEGENERACY
ORBITAL DEGREES OF FREEDOM
ORBITAL EFFECTS
QUANTUM EFFECTS
RECENT PROGRESS
SPIN ORBIT INTERACTIONS
SPIN ORBIT COUPLING
URI: http://hdl.handle.net/10995/103181
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85099003438
PURE ID: 21189520
ISSN: 92665
DOI: 10.1021/acs.chemrev.0c00579
metadata.dc.description.sponsorship: We thank the Deutsche Forschungsgemeinschaft (Project 277146847-CRC 1238), the Russian Foundation for Basic Research (Grant RFBR 20-32-70019), and the Russian Ministry of Science and Higher Education (Program “Quantum” AAAA-A18-118020190095-4 and Contract 02.A03.21.0006) for support. The preparation of was supported by the Russian Science Foundation (Project 20-62-46047).
RSCF project card: 20-62-46047
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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