Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates

Details Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates

1997-05-05

arxiv.org/abs/cond-mat/9705035v1

PRB 56, R4317, 1997

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, with eps figures

Scientific paper

10.1103/PhysRevB.56.R4317

We show that important anomalous features of the normal-state thermoelectric power S of high-Tc materials can be understood as being caused by doping dependent short-range antiferromagnetic correlations. The theory is based on the fluctuation-exchange approximation applied to Hubbard model in the framework of the Kubo formalism. Firstly, the characteristic maximum of S as function of temperature can be explained by the anomalous momentum dependence of the single-particle scattering rate. Secondly, we discuss the role of the actual Fermi surface shape for the occurrence of a sign change of S as a function of temperature and doping.

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