Nodeless superconductivity in the noncentrosymmetric superconductor BiPd. (5th April 2016)

• Record Type: Journal Article
• Authors: Yan, X B; Xu, Y; He, L P; Dong, J K; Cho, Hwanbeom; Peets, D C; Park, Je-Geun; Li, S Y
• Is Part Of: Superconductor science & technology. Volume 29:Number 6(2016:Jun.)
• Publication Date: 2016-04-05
• Subjects: noncentrosymmetric superconductor -- thermal conductivity -- superconducting gap structure; Superconductivity -- Periodicals; Superconductors -- Periodicals; 537.623
• DOI: 10.1088/0953-2048/29/6/065001
• Languages: English
• ISSNs: 0953-2048

Abstract

Abstract: We report low-temperature thermal conductivity measurements on high-quality single crystalline α -BiPd, a noncentrosymmetric superconductor with T c ≃ 3.8 K. In zero magnetic field, the residual linear term κ 0 / T is absent, indicating a full gap and suggesting dominant singlet pairing. Consistent with this picture, κ 0 ( H )/ T shows weak field dependence in low field, but grows relatively fast in fields above 0.03 T (≃1/5 H c2 ). Implications for the material's disputed high-field behavior are discussed, and constraints are placed on the previously proposed scenarios.