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

    Fingerprint

    Coulomb interactions
    Bromides
    bromides
    Salts
    salts
    Modulation
    bandwidth
    Bandwidth
    modulation
    interactions
    optical measurement
    sublattices
    magnetic measurement
    Anions
    Cations
    periodic variations
    Energy gap
    Negative ions
    Crystal structure
    Positive ions

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

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

    Commensurate Peierls transition in a quasi-one-dimensional compound : The bromide salt of tetrathiafulvalene (TTF). / Chaikin, P. M.; Craven, R. A.; Etemad, S.; La Placa, S. J.; Scott, B. A.; Tomkiewicz, Y.; Torrance, J. B.; Welber, B.

    In: Physical Review B, Vol. 22, No. 12, 1980, p. 5599-5605.

    Research output: Contribution to journalArticle

    Chaikin, PM, Craven, RA, Etemad, S, La Placa, SJ, Scott, BA, Tomkiewicz, Y, Torrance, JB & Welber, B 1980, 'Commensurate Peierls transition in a quasi-one-dimensional compound: The bromide salt of tetrathiafulvalene (TTF)', Physical Review B, vol. 22, no. 12, pp. 5599-5605. https://doi.org/10.1103/PhysRevB.22.5599
    Chaikin, P. M. ; Craven, R. A. ; Etemad, S. ; La Placa, S. J. ; Scott, B. A. ; Tomkiewicz, Y. ; Torrance, J. B. ; Welber, B. / Commensurate Peierls transition in a quasi-one-dimensional compound : The bromide salt of tetrathiafulvalene (TTF). In: Physical Review B. 1980 ; Vol. 22, No. 12. pp. 5599-5605.
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    AU - Chaikin, P. M.

    AU - Craven, R. A.

    AU - Etemad, S.

    AU - La Placa, S. J.

    AU - Scott, B. A.

    AU - Tomkiewicz, Y.

    AU - Torrance, J. B.

    AU - Welber, B.

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    AB - 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.

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