Role of Temperature Dependent Chemical Potential on Thermoelectric Power

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  • Takeuchi Tsunehiro
    EcoTopia Science Institute, Nagoya University Department of Crystalline Materials Science, Nagoya University
  • Toyama Yasuhiro
    Department of Crystalline Materials Science, Nagoya University
  • Yamamoto Akio
    Department of Crystalline Materials Science, Nagoya University

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Description

In this paper, the relation between chemical potential and thermoelectric power is investigated by using the linear response theory, possible models of electronic structure, the consequently obtained spectral conductivities, and high-resolution photoemission spectroscopy. We revealed that the effect of temperature dependent chemical potential on thermoelectric power S(T) is negligibly small when its magnitude is limited below 100 μV/K, but becomes nontrivial with increasing S(T). The validity of this argument we proposed on the basis of theoretical calculation was experimentally confirmed using the high-resolution photoemission spectra of the materials possessing a large magnitude in thermoelectric power.

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 51 (3), 421-427, 2010

    The Japan Institute of Metals and Materials

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