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.
- 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