Thermal transport properties of a charge density wave

Hiroyuki Yoshimoto*, Susumu Kurihara

*この研究の対応する著者

    研究成果査読

    1 被引用数 (Scopus)

    抄録

    The effects of collective modes on the thermoelectric properties of a charge density system is studied. We derive the temperature dependences of thermoelectric power and thermal conductivity by applying the linear response theory to the Fröhlich Hamiltonian. Energy dissipation has been attributed to the nonlinear interaction between the phase mode and the amplitude mode, ignoring disorder effects. We have found that the temperature dependence of the correlation function between electrical and heat currents is the same as that of the correlation function between electrical currents. This implies that thermoelectric power is inversely proportional to temperature. We have also found that the temperature dependences of all correlation functions are essentially determined by the same mechanism - nonlinear amplitude-phase interaction. The thermal conductivity is nearly constant at a temperature above the amplitude mode gap, and is exponentially low at a temperature sufficiently below it.

    本文言語English
    論文番号014601
    ジャーナルJournal of the Physical Society of Japan
    75
    1
    DOI
    出版ステータスPublished - 2006 1

    ASJC Scopus subject areas

    • 物理学および天文学(全般)

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