Exceeding the Pauli paramagnetic limit in the critical field of (TMTSF)2PF6

I. J. Lee, P. M. Chaikin, M. J. Naughton

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The resistive upper critical field along the b axis (Hc2∥b) in (TMTSF)2PF6 is investigated in detail in fields to 17.5 T and temperatures to T/Tc∼1/60, at various pressures near the border between spin-density wave and metallic states. Remarkably, in an optimum pressure setting reported here, it is found that the onset of superconductivity persists up to 9 T (>4Hp), which strongly suggests triplet Cooper pairing. Strong upward curvature with nearly diverging behavior of the critical field seems to suggest a field-dependent dimensional crossover, although the Hc2 enhancement is considerably more than that predicted by recent theories.

    Original languageEnglish (US)
    Article numberR14669
    Pages (from-to)R14669-R14672
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume62
    Issue number22
    DOIs
    StatePublished - Dec 1 2000

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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