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 journalArticle

70 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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