Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates

G. Hildebrand; J. Schmalian; S. Grabowski; T.J. Hagenaars; W. Hanke

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Effects of Electronic Correlations on the Thermoelectric Power of the Cuprates

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arxiv cond-mat/9705035 v1 pith:ZL6H7NSI submitted 1997-05-05 cond-mat.str-el cond-mat.supr-con

G. Hildebrand , T.J. Hagenaars , W. Hanke , S. Grabowski , J. Schmalian This is my paper · ORCID

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keywords anomalouscorrelationsdopingfunctionpowertemperaturethermoelectricactual

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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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