Non-monotonic temperature dependence of thermopower in strongly correlated electron systems
arXiv:1104.2119 · doi:10.1103/PhysRevB.84.153107
Abstract
We examine the temperature dependence of thermopower in the single band Hubbard model using dynamical mean-field theory. The strong Coulomb interaction brings about the coherent-to-incoherent crossover as temperature increases. As a result, the thermopower exhibits non-monotonic temperature dependence and asymptotically approaches values given by the Mott-Heikes formula. In the light of our theoretical result, we discuss the thermopower in some transition metal oxides. The magnetic field dependence of the thermopower is also discussed.
4 pages, 4 figures
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