Tetrathiafulvalene tetracyanoquinodimethane (TTF-TCNQ): A zero-bandgap semiconductor?

U. Bernstein, P. M. Chaikin, P. Pincus

    Research output: Contribution to journalArticlepeer-review


    We present numerical calculations based on a tight-binding model for the organic conductor tetrathiafulvalene tetracyanoquinodimethane (TTF-TCNQ). The model consists of anisotropic planar TTF and TCNQ bands coupled together by an interplanar transfer integral, which produces a nearly zero-bandgap semiconductor. The calculations are compared with experiments and it is found unlikely that all of the data can be explained simultaneously by a noninteracting electron band structure. We then discuss how many-body effects may affect the model and lead to a metal-insulator transition as observed.

    Original languageEnglish (US)
    Pages (from-to)271-274
    Number of pages4
    JournalPhysical Review Letters
    Issue number5
    StatePublished - 1975

    ASJC Scopus subject areas

    • General Physics and Astronomy


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