Spin excitations and the electronic specific heat of URu2Si2

T.E. Mason, W.J.L. Buyers

    Research output: Contribution to journalJournal articleResearch

    Abstract

    We have calculated the mass enhancement due to the interaction of conduction electrons with spin fluctuations, using the generalized spin susceptibility determined from neutron-scattering measurements, for the heavy-fermion superconductor URu2Si2. Reasonable coupling between the spin excitations and conduction electrons yields m*/m(b) almost-equal-to 7.7 for T < T(N) and m*/m(b) almost-equal-to 11.4 for T > T(N) which is sufficient to account for the difference between band-structure calculations and the measured electronic specific heat. In addition, inclusion of the temperature dependence of the spin excitations as T(N) is approached from below reproduces, qualitatively, the peak observed in the specific heat at T(N). The peak arises from a gap in the spin, not charge spectrum below T(N).
    Original languageEnglish
    JournalPhysical Review B
    Volume43
    Issue number13
    Pages (from-to)11471-11473
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1991

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