Field dependence of the zero-energy density of states around vortices in an anisotropic-gap superconductor

N. Nakai, P. Miranović, M. Ichioka, K. Machida

    Research output: Contribution to journalArticlepeer-review

    71 Citations (Scopus)

    Abstract

    It is shown theoretically that the Sommerfeld coefficient γ(B) in the mixed state contains useful information on the gap topology in a superconductor. We accurately evaluate γ(B) against magnetic induction B by using microscopic quasiclassical theory. The linear portion in γ(B) relative to 5c2 and its slope in low field faithfully corresponds to the gap anisotropy, so that we can distinguish the nodal gap and the anisotropic full gap, and estimate the magnitude of the gap anisotropy.

    Original languageEnglish
    Article number100503
    Pages (from-to)100503-1-100503-4
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume70
    Issue number10
    DOIs
    Publication statusPublished - Sep 2004

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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