Specific heat of YNi2B2C analyzed using two-gap model

C. L. Huang*, C. P. Sun, Jiunn-Yuan Lin, H. J. Kim, E. M. Choi, S. I. Lee, H. D. Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

New specific-heat data of YNi2B2C single crystal were measured and analyzed using two-gap model. The obtained Tc=13.77K, γn=19.74 mJ/mol K2, D=533K, ΔC/ γnTc=1.57 are consistent with those of previously reported indicating a good quality of crystal. In the superconducting state, the Ce can not be fitted to a simple isotropic-gap BCS relation. Instead, it can be well described by a two-gap model. The large gap ΔL=2.67meV and small gap ΔS=1.19meV can be obtained with 71% and 29% weighting for the density of states at Fermi surface, respectively. These results are compared with those taken by point-contact spectroscopy recently.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages685-686
Number of pages2
DOIs
StatePublished - 1 Dec 2006
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 10 Aug 200617 Oct 2006

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period10/08/0617/10/06

Keywords

  • Specific-heat
  • Superconductivity
  • Two-gap model
  • YNiBC

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