Effects of electronic correlations on the thermoelectric power of the cuprates

Journal Article · Fri Aug 01 00:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.R4317· OSTI ID:538553

Hildebrand, G; Hagenaars, T J; Hanke, W ^[1]; Grabowski, S; Schmalian, J ^[2]

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1. Institut fuer Theoretische Physik, Universitaet Wuerzburg, Am Hubland, D-97074 Wuerzburg (Germany)
2. Institut fuer Theoretische Physik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin (Germany)

We show that important anomalous features of the normal-state thermoelectric power S of high-T{sub c} 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 the Hubbard model in the framework of the Kubo formalism. First, the characteristic maximum of S as a function of temperature can be explained by the anomalous momentum dependence of the single-particle scattering rate. Second, 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. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 538553
• Journal Information: Physical Review, B: Condensed Matter, Vol. 56, Issue 8; Other Information: PBD: Aug 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
HIGH-TC SUPERCONDUCTORS
THERMOELECTRIC PROPERTIES
LANTHANUM COMPOUNDS
STRONTIUM COMPOUNDS
YTTRIUM COMPOUNDS
BARIUM COMPOUNDS
ANTIFERROMAGNETIC MATERIALS
FERMI LEVEL
DOPED MATERIALS
HUBBARD MODEL
CUPRATES
TEMPERATURE DEPENDENCE
ANTIFERROMAGNETISM