TY - JOUR
T1 - Nonmonotonic temperature dependence of thermopower in strongly correlated electron systems
AU - Matsuo, M.
AU - Okamoto, S.
AU - Koshibae, W.
AU - Mori, M.
AU - Maekawa, S.
PY - 2011/10/31
Y1 - 2011/10/31
N2 - 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 nonmonotonic 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.
AB - 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 nonmonotonic 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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U2 - 10.1103/PhysRevB.84.153107
DO - 10.1103/PhysRevB.84.153107
M3 - Article
AN - SCOPUS:80455156382
SN - 0163-1829
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 15
M1 - 153107
ER -