Anisotropic thermopower of the organic superconductor κ-(BEDT-TTF) 2Cu[N(CN)2]Br

R. C. Yu, J. M. Williams, H. H. Wang, J. E. Thompson, A. M. Kini, K. D. Carlson, J. Ren, M. H. Whangbo, P. M. Chaikin

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The thermopower of the organic superconductor κ-(BEDT-TTF)2Cu[N(CN)2] Br single crystals has been measured in two crystallographic directions a and c within the most conducting organic donor molecule plane. [Here BEDT-TTF represents bis(ethylenethio)-tetrathiafulvalene.] While the thermopower in the a direction is positive, the thermopower in the c direction is negative. The drastic anisotropy in thermopower reveals that the carriers in the a direction are holelike, whereas the carriers in the c direction are electronlike. A calculation based on the tight-binding electronic band structure is able to describe the temperature dependence of the anisotropic thermopower, but with a much reduced band dispersion.

    Original languageEnglish (US)
    Pages (from-to)6932-6936
    Number of pages5
    JournalPhysical Review B
    Volume44
    Issue number13
    DOIs
    StatePublished - 1991

    ASJC Scopus subject areas

    • Condensed Matter Physics

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