Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/69696
Type: Artigo de periódico
Title: Orbital correlations in the ferromagnetic half-metal CrO2
Author: Laad, MS
Craco, L
Muller-Hartmann, E
Abstract: We deduce a model relevant for the description of the ferromagnetic half-metal chromium dioxide (CrO2), widely used in magnetic recording technology. The model describes the effect of dynamical, local orbital correlations arising from local quantum chemistry of the material. A finite-temperature solution of the model in d = infinity provides a natural explanation of the optical response, photoemission, resistivity, and the large Woods-Saxon ratio observed in experiments. Our study confirms the important role of many-body dynamical correlation effects for a proper understanding of the metallic phase of CrO2.
Country: EUA
Editor: American Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.87.214421
Date Issue: 2001
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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