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

Minoru Nohara; Masanobu Isshiki; Fumiko Sakai; Hidenori Takagi

doi:10.1143/JPSJ.68.1078

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 journal › Article › peer-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(Ni_{1 - x}Pt_x)₂B₂C and Nb_{1 - x}Ta_xSe₂. 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 language	English
Pages (from-to)	1078-1081
Number of pages	4
Journal	journal of the physical society of japan
Volume	68
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.68.1078
Publication status	Published - Apr 1999
Externally published	Yes

Keywords

NbSe
Quasiparticle density of states
Vortex state
YNiBC

ASJC Scopus subject areas

Physics and Astronomy(all)

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AU - Nohara, Minoru

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AU - Sakai, Fumiko

AU - Takagi, Hidenori

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