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Temperature Dependence of Thermopower in Strongly Correlated Multiorbital Systems

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arxiv 1308.0416 v1 pith:ZTXQTTLX submitted 2013-08-02 cond-mat.str-el

M. Sekino , S. Okamoto , W. Koshibae , M. Mori , S. Maekawa This is my paper
classification cond-mat.str-el
keywords dependencetemperaturethermopowermultiorbitalapproximationbringcorrelatedcoulomb
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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.

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