Evidence for strong Coulomb correlations in an organic conductor

P. M. Chaikin, J. F. Kwak, A. J. Epstein

    Research output: Contribution to journalArticle

    Abstract

    The thermopower of highly conducting quarter-filled-band TCNQ (tetracyanoquinodimethane) salts corresponds to an entropy per carrier of k ln2. We have measured the change of the thermoelectric power upon application of a magnetic field for quinolinium ditetracyanoquinodimethane. We find an isotropic shift which agrees with the entropy change of a free-spin system. Coupled with the observation of a negligibly small magnetoresistance, this provides definite evidence that the conducting electrons are correlated as in the strong-coupling Hubbard model.

    Original languageEnglish (US)
    Pages (from-to)1178-1182
    Number of pages5
    JournalPhysical Review Letters
    Volume42
    Issue number17
    DOIs
    StatePublished - 1979

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    conductors
    entropy
    conduction
    salts
    shift
    magnetic fields
    electrons

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Evidence for strong Coulomb correlations in an organic conductor. / Chaikin, P. M.; Kwak, J. F.; Epstein, A. J.

    In: Physical Review Letters, Vol. 42, No. 17, 1979, p. 1178-1182.

    Research output: Contribution to journalArticle

    Chaikin, P. M. ; Kwak, J. F. ; Epstein, A. J. / Evidence for strong Coulomb correlations in an organic conductor. In: Physical Review Letters. 1979 ; Vol. 42, No. 17. pp. 1178-1182.
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