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

    研究成果: Article査読

    10 被引用数 (Scopus)

    抄録

    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).

    本文言語English
    ページ(範囲)452-456
    ページ数5
    ジャーナルJournal of Electron Spectroscopy and Related Phenomena
    156-158
    DOI
    出版ステータスPublished - 2007 5

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 放射線
    • 原子分子物理学および光学
    • 凝縮系物理学
    • 分光学
    • 物理化学および理論化学

    フィンガープリント

    「Quantitate evaluation of the thermoelectric power of (Bi,Pb)<sub>2</sub> Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub> from the experimentally determined electronic structure」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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