Commensurate Peierls transition in a quasi-one-dimensional compound: The bromide salt of tetrathiafulvalene (TTF)

P. M. Chaikin, R. A. Craven, S. Etemad, S. J. La Placa, B. A. Scott, Y. Tomkiewicz, J. B. Torrance, B. Welber

    Research output: Contribution to journalArticle

    Abstract

    The x-ray crystal structure of the bromide salt of tetrathiafulvalene (TTF)-Br0.79 shows incommensurate cation and anion sublattices, with a static modulation of each stack at the periodicity of the opposing stack. If the on-site Coulomb interactions were very small compared with the bandwidth, this modulation would induce an energy gap at twice the Fermi wave vector and hence a commensurate Peierls transition would be possible. If the Coulomb interactions were very large, (TTF)-Brx would be a room-temperature semiconductor. Transport, magnetic, thermal, and optical measurements are presented, which indicate that the Coulomb interactions are not very large compared with the bandwidth, estimated at 4t∼1.1 eV. Hence, the system can be viewed as undergoing a commensurate Peierls transition at ∼ 170 K.

    Original languageEnglish (US)
    Pages (from-to)5599-5605
    Number of pages7
    JournalPhysical Review B
    Volume22
    Issue number12
    DOIs
    StatePublished - 1980

    ASJC Scopus subject areas

    • Condensed Matter Physics

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    Chaikin, P. M., Craven, R. A., Etemad, S., La Placa, S. J., Scott, B. A., Tomkiewicz, Y., Torrance, J. B., & Welber, B. (1980). Commensurate Peierls transition in a quasi-one-dimensional compound: The bromide salt of tetrathiafulvalene (TTF). Physical Review B, 22(12), 5599-5605. https://doi.org/10.1103/PhysRevB.22.5599