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Title: Spin state transition and covalent bonding in LaCoO3
Authors: Krapek, V.
Novak, P.
Kunes, J.
Novoselov, D.
Korotin, Dm M.
Anisimov, V. I.
Issue Date: 2012
Citation: Spin state transition and covalent bonding in LaCoO3 / V. Krapek, P. Novak, J. Kunes, D. Novoselov, Dm M. Korotin, V. I. Anisimov // Physical Review B - Condensed Matter and Materials Physics. — 2012. — Vol. 86. — № 19.
Abstract: We use the dynamical mean-field theory to study a p-d Hubbard Hamiltonian for LaCoO 3 derived from ab initio calculations in local density approximation (LDA+DMFT scheme). We address the origin of local moments observed above 100 K and discuss their attribution to a particular atomic multiplet in the presence of covalent Co-O bonding. We show that in solids such attribution, based on the single ion picture, is in general not possible. We explain when and how the single ion picture can be generalized to provide a useful approximation in solids. Our results demonstrate that the apparent magnitude of the local moment is not necessarily indicative of the underlying atomic multiplet. We conclude that the local moment behavior in LaCoO 3 arises from the high-spin state of Co and explain the precise meaning of this statement. © 2012 American Physical Society.
SCOPUS ID: 84869007580
WOS ID: 000310684100004
PURE ID: 1071521
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.86.195104
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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