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|Type:||Artigo de periódico|
|Title:||Orbital correlations in the ferromagnetic half-metal CrO2|
|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.|
|Editor:||American Physical Soc|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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