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Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates

G. Hildebrand·T. J. Hagenaars·W. Hanke·S. Grabowski·J. Schmalian
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Abstract

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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G. Hildebrand, T. J. Hagenaars, W. Hanke, S. Grabowski, J. Schmalian. 1997-05-05. Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates. https://doi.org/10.1103/physrevb.56.r4317

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