Organic conductors and superconductors at high field

P. M. Chaikin, W. Kang, S. Hannahs, R. C. Yu

    Research output: Contribution to journalArticle

    Abstract

    The organic charge transfer salts (TMTSF)2X (where X=ClO4, PF6, ReO4, etc.) are among the most remarkable materials discovered. A single crystal of the PF6 salt exhibits metallic, insulating, antiferromagnetic, spin density wave, and superconducting phases as well as quantum Hall effects (QHE) as temperature, pressure and magnetic field are varied. In addition there are new phenomena found in no other materials: a cascade of magnetic field induced transitions and a new form of quantum oscillations. The QHE is particularly interesting in that it is observed for the first time in a bulk crystal. Unlike the conventional integer effect which arises from noninteracting particles and some disorder, in these salts the QHE is the result of a collective spin density wave distortion which assures that the Fermi energy is always in the gap between Landau bands and the QHE steps are accompanied by first order phase transitions.

    Original languageEnglish (US)
    Pages (from-to)353-360
    Number of pages8
    JournalPhysica B: Physics of Condensed Matter
    Volume177
    Issue number1-4
    DOIs
    StatePublished - Mar 2 1992

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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