Metal-insulator transitions and superconductivity in ditetramethyltetraselenafulvalenium fluorosulfonate [(TMTSF)2FSO3]

R. C. Lacoe, S. A. Wolf, P. M. Chaikin, F. Wudl, E. Aharon-Shalom

    Research output: Contribution to journalArticle


    We have investigated the phase diagram of the orgainic charge-transfer salt ditetramethyltetraselenafulvalenium fluorosulfenate [(TMTSF)2FSO3] which contains an asymmetric dipolar anion. At low pressures there is a metal-insulator transition related to anion ordering. Between 5 and 6 kbar, there is a dipolar glass phase with increased resistivity. However, thermopower and superconducting measurements indicate that the Fermi surface remains ungapped. Above 5 kbar there is a superconducting transition with Tc>2 K. This is the highest Tc for this family of compounds and suggests that the anions can enhance Tc.

    Original languageEnglish (US)
    Pages (from-to)1947-1950
    Number of pages4
    JournalPhysical Review B
    Issue number3
    Publication statusPublished - 1983


    ASJC Scopus subject areas

    • Condensed Matter Physics

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