Quantitate evaluation of the thermoelectric power of (Bi,Pb)2 Sr2CaCu2O8+δ from the experimentally determined electronic structure

Tsunehiro Takeuchi, Hiroyuki Kaga, Yoshinori Okada, Hiroshi Ikuta, Teruhisa Baba, Shunsuke Tsuda, Shik Shin

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    11 Citations (Scopus)

    Abstract

    Energy-momentum (ε{lunate} - over(k, →)) dispersion of the overdoped (Bi,Pb)2Sr2CaCu2O8+δ with the superconducting transition temperature of 66 K was determined by the high-resolution angle resolved photoemission spectroscopy (ARPES). Bilayer-splitting caused by the two CuO2 planes in the basis was clearly observed in the present ARPES measurements. Spectral conductivity σ (ε{lunate}) was calculated from the determined ε{lunate} (over(k, →)) by taking the bilayer splitting into account with employing the Boltzmann transport equation. The calculated thermoelectric power S (T) form thus determined σ (ε{lunate}) reproduced extremely well the observed one, strongly indicating the important role of the electronic structure on the temperature dependence of S (T) in the cuprate superconductors. The bilayer-splitting certainly provides a finite contribution to the temperature dependence of S (T) but it is too trivial to significantly affect the strong hole-concentration dependence of S (T).

    Original languageEnglish
    Pages (from-to)452-456
    Number of pages5
    JournalJournal of Electron Spectroscopy and Related Phenomena
    Volume156-158
    DOIs
    Publication statusPublished - 2007 May 1

    Keywords

    • Angle resolved photoemission spectroscopy
    • Cuprate superconductor
    • Seebeck coefficient
    • Thermoelectric power

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Radiation
    • Atomic and Molecular Physics, and Optics
    • Condensed Matter Physics
    • Spectroscopy
    • Physical and Theoretical Chemistry

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