NMR study of superconductors Li2(Pd1-xPt x)3B and Mg10±xIr19B 16+y without inversion symmetry

S. Harada, K. Tahara, Z. Li, J. L. Luo, Y. Inada, Guo Qing Zheng

Research output: Contribution to journalArticle

Abstract

We report the 11B NMR measurements in non-centrosymmetric superconductors Li2(Pd1-xPtx)3B (x=0.0,0.2,0.5,1.0),Mg9.3Ir19B16.7 and Mg 10.5Ir19B17.1. In Li2(Pd 1-xPtx)3B, BCS superconducting state for x=0-0.5 evolves into an exotic state with line nodes in the gap function for x=1, which is attributed to the enhanced spin-orbit coupling due to heavy element Pt. In Mg9.3Ir19B16.7 and Mg 10.5Ir19B17.1, Cooper pairs are predominantly in the spin-singlet state with an isotropic gap. However, in Mg 10.5Ir19B17.1 the spin susceptibility remains finite even in the zero-temperature limit, which is due to the defects that enhance the spin-orbit coupling and bring about more spin-triplet component.

Original languageEnglish
Pages (from-to)S678-S681
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - Dec 1 2010

Keywords

  • NMR
  • Noncentrosymmetric 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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