Temperature Dependence of Thermopower in Strongly Correlated Multiorbital Systems

Temperature dependence of thermopower in the multiorbital Hubbard model is studied by using the dynamical mean-field theory with the non-crossing approximation impurity solver. It is found that the Coulomb interaction, the Hund coupling, and the crystal filed splitting bring about non-monotonic temp...

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Bibliographic Details
Published inarXiv.org
Main Authors Sekino, M, Okamoto, S, Koshibae, W, Mori, M, Maekawa, S
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 02.08.2013
Subjects
Mean field theory
Physics - Strongly Correlated Electrons
Temperature
Temperature dependence
Thermoelectricity
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Summary:Temperature dependence of thermopower in the multiorbital Hubbard model is studied by using the dynamical mean-field theory with the non-crossing approximation impurity solver. It is found that the Coulomb interaction, the Hund coupling, and the crystal filed splitting bring about non-monotonic temperature dependence of the thermopower, including its sign reversal. The implication of our theoretical results to some materials is discussed.
ISSN:2331-8422
DOI:10.48550/arxiv.1308.0416