Non-monotonic temperature dependence of thermopower in strongly correlated electron systems

Details Non-monotonic temperature dependence of thermopower in strongly correlated electron systems Non-monotonic temperature dependence of thermopower in strongly correlated electron systems

2011-04-12

arxiv.org/abs/1104.2119v4

Phys. Rev. B 84, 153107 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.84.153107

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.

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