Electronic state around vortex in a two-band superconductor

Masanori Ichioka, Kazushige Machida, Noriyuki Nakai, Predrag Miranović

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    37 Citations (Scopus)

    Abstract

    Based on the quasiclassical theory, we investigate the vortex state in a two-band superconductor with a small gap on a three-dimensional Fermi surface and a large gap on a quasi-two dimensional one, as in MgB2. The field dependence of zero-energy density of states is compared for fields parallel and perpendicular to the ab plane, and the anisotropy of the vortex core shape is discussed for a parallel field. The Fermi surface geometry of two bands, combining the effect of the normal-like electronic state on the small gap band at high fields, produces characteristic behavior in the anisotropy of c and ab directions.

    Original languageEnglish
    Article number144508
    Pages (from-to)144508-1-144508-6
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume70
    Issue number14
    DOIs
    Publication statusPublished - Oct 2004

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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