  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.
