Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/102255
Title: Role of local geometry in the spin and orbital structure of transition metal compounds
Authors: Khomskii, D. I.
Kugel, K. I.
Sboychakov, A. O.
Streltsov, S. V.
Issue Date: 2016
Publisher: Maik Nauka-Interperiodica Publishing
Citation: Role of local geometry in the spin and orbital structure of transition metal compounds / D. I. Khomskii, K. I. Kugel, A. O. Sboychakov, et al. — DOI 10.1134/S1063776116030079 // Journal of Experimental and Theoretical Physics. — 2016. — Vol. 122. — Iss. 3. — P. 484-498.
Abstract: We analyze the role of local geometry in the spin and orbital interaction in transition metal compounds with orbital degeneracy. We stress that the tendency observed in the most studied case (transition metals in O6 octahedra with one common oxygen—common corner of neighboring octahedra—and with ~180° metal–oxygen–metal bonds), that ferro-orbital ordering renders antiferro-spin coupling and, vice versa, antiferro-orbitals give ferro-spin ordering, is not valid in the general case, in particular, for octahedra with a common edge and with ~90° M–O–M bonds. Special attention is paid to the “third case,” that of neighboring octahedra with a common face (three common oxygens), which has largely been disregarded until now, although there are many real systems with this geometry. Interestingly enough, the spin-orbit exchange in this case turns out to be simpler and more symmetric than in the first two cases. We also consider, which form the effective exchange takes for different geometries in the case of strong spin–orbit coupling. © 2016, Pleiades Publishing, Inc.
Keywords: METALS
OXYGEN
TRANSITION METAL COMPOUNDS
TRANSITION METALS
DIFFERENT GEOMETRY
LOCAL GEOMETRY
ORBIT COUPLING
ORBITAL DEGENERACY
ORBITAL INTERACTION
ORBITAL ORDER
REAL SYSTEMS
SPIN COUPLINGS
GEOMETRY
URI: http://hdl.handle.net/10995/102255
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 84970010012
PURE ID: 869763
ISSN: 10637761
DOI: 10.1134/S1063776116030079
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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