Magnetic response of noncentrosymmetric superconductor La2 C3: Effect of double-gap and spin-orbit interaction

R. Kadono, M. Hiraishi, M. Miyazaki, K. H. Satoh, S. Takeshita, S. Kuroiwa, S. Saura, J. Akimitsu

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The presence of spin-orbit (SO) interaction in a noncentrosymmetric superconductor, La2 C3 (Tc ≃ 11 K) is demonstrated by muon spin rotation (μSR) in its normal state, where μSR spectra exhibit field-induced weak depolarization due to van Vleck-like local susceptibility. In the mixed state, muon spin relaxation due to inhomogeneity of internal field (σv) exhibits a field dependence that is characterized by a kink, where σv (and hence the superfluid density) is more strongly reduced at lower fields. This is perfectly in line with the presence of a secondary energy gap previously inferred from the temperature dependence of σv, and also consistent with the possible influence of asymmetric deformation of the Fermi surface due to the SO interaction.

Original languageEnglish
Pages (from-to)737-739
Number of pages3
JournalPhysica B: Condensed Matter
Volume404
Issue number5-7
DOIs
Publication statusPublished - Apr 15 2009
Externally publishedYes

Keywords

  • Quasiparticle excitation
  • Spin-orbit interaction
  • Superconductivity

ASJC Scopus subject areas

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

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