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 language | English |
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Pages (from-to) | 1078-1081 |
Number of pages | 4 |
Journal | journal of the physical society of japan |
Volume | 68 |
Issue number | 4 |
DOIs | |
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)