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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
Citation: Physical Review B. American Physical Soc, v. 64, n. 21, 2001.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.87.214421
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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