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, Yoshihiko 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
JournalPhysica C: Superconductivity and its Applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - Dec 2010

Fingerprint

Superconducting materials
Orbits
Nuclear magnetic resonance
inversions
nuclear magnetic resonance
symmetry
Defects
orbits
heavy elements
Temperature
magnetic permeability
defects
temperature

Keywords

  • NMR
  • Noncentrosymmetric superconductor
  • Nuclear spin-lattice relaxation rate

ASJC Scopus subject areas

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

Cite this

NMR study of superconductors Li2(Pd1-xPt x)3B and Mg10±xIr19B 16+y without inversion symmetry. / Harada, S.; Tahara, K.; Li, Z.; Luo, J. L.; Inada, Yoshihiko; Zheng, Guo-Qing.

In: Physica C: Superconductivity and its Applications, Vol. 470, No. SUPPL.1, 12.2010.

Research output: Contribution to journalArticle

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AU - Luo, J. L.

AU - Inada, Yoshihiko

AU - Zheng, Guo-Qing

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AB - 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.

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