Primitive description for Hall oscillations in the extreme quantum limit of (TMTSF)2ClO4

S. McKernan, S. Uji, J. S. Brooks, P. M. Chaikin

    Research output: Contribution to journalArticle

    Abstract

    (TMTSF)2ClO4 undergoes a cascade of Field Induced Spin Density Wave (FISDW) transitions as magnetic field are increased at low temperature. Each phase corresponds to a different integer quantum Hall state, ν, with ρx y = h / 2 ν e2. However, after a "final" transition at ∼26 T there remain non quantized oscillations in transport and thermodynamic properties as particularly evident in recent Hall measurements. The nature of this high field state is unknown at present. In (TMTSF)2ClO4 an anion ordering transition leads to two Fermi surfaces. Here we introduce a simple description where one of the two Fermi surfaces is gapped by an FISDW at kF 1, ν = 0 while the other Fermi surface lacks an FISDW gap. Satellite gaps (with index ν) at magnetic wave vectors G (G = e B b / h{stroke}, b the interchain lattice constant), i.e. at kF 1 + ν G, gaps are swept past the second Fermi surface at kF 2. This causes Hall sign changes at a frequency given by ν G = kF 2 - kF 1 (or n h ωc = 2 tb: the transverse bandwidth) as observed.

    Original languageEnglish (US)
    Pages (from-to)385-388
    Number of pages4
    JournalSolid State Communications
    Volume145
    Issue number7-8
    DOIs
    StatePublished - Feb 1 2008

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    Keywords

    • A. Organic crystals
    • D. Electronic band structure
    • D. Electronic transport
    • D. Quantum Hall effect

    ASJC Scopus subject areas

    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry

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