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 journalArticlepeer-review

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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