11B and 195Pt NMR study of the superconductors Li2(Pd1-xPtx)3B without inversion symmetry

S. Harada, Y. Inada, G. Q. Zheng

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report the 11B and 195Pt NMR measurements in non-centrosymmetric superconductors Li2(Pd1 xPtx)3B (x = 0.0, 0.2, 0.5, 1.0). From the measurements of spin-lattice relaxation time (T1), we found that there was a coherence peak (CP) just below superconducting transition temperature (Tc) for x = 0-0.5 but no CP in x= 1. We demonstrated that the system for x= 0-0.5 were BCS superconductors but there existed line node in the superconducting gap for x = 1.0. The 195Pt Knight Shift in x = 0.2 decreased below Tc, indicating spin-singlet state. The results showed that BCS superconducting state evolves into an exotic state with line-nodes in the gap function when x is increased, as the spin-orbit coupling is enhanced.

Original languageEnglish
Pages (from-to)1089-1091
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume470
Issue number20
DOIs
Publication statusPublished - Nov 1 2010

Keywords

  • NMR
  • Non-centrosymmetric superconductor
  • Nuclear spin-lattice relaxation rate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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