Monday, August 5, 2013

1308.0416 (M. Sekino et al.)

Temperature Dependence of Thermopower in Strongly Correlated
Multiorbital Systems

M. Sekino, S. Okamoto, W. Koshibae, M. Mori, S. Maekawa
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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