Quasiparticle Density of States of Clean and Dirty s-Wave Superconductors in the Vortex State

Minoru Nohara, Masanobu Isshiki, Fumiko Sakai, Hidenori Takagi

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

The quasiparticle density of states (DOS) in the vortex state has been probed by specific heat measurements under magnetic fields (H) for clean and dirty s-wave superconductors, Y(Ni1 - xPtx)2B2C and Nb1 - xTaxSe2. We find that the quasiparticle DOS per vortex is appreciably H-dependent in the clean-limit superconductors, while it is H-independent in the dirty superconductors as expected from a conventional rigid normal electron core picture. We discuss possible origins for our observations in terms of the shrinking of the vortex core radius with increasing H.

Original languageEnglish
Pages (from-to)1078-1081
Number of pages4
Journaljournal of the physical society of japan
Volume68
Issue number4
DOIs
Publication statusPublished - Apr 1999
Externally publishedYes

Keywords

  • NbSe
  • Quasiparticle density of states
  • Vortex state
  • YNiBC

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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