Magnetic response of noncentrosymmetric superconductor La2C3: Effect of   double-gap and spin-orbit interaction
  The presence of spin-orbit (SO) interaction in a noncentrosymmetric superconductor, La2C3 (T_c~11 K) is demonstrated by muon spin rotation (muSR) in its normal state, where muSR 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 (sigma_v) exhibits a field dependence that is characterized by a kink, where sigma_v (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 sigma_v, and also consistent with the possible influence of asymmetric deformation of the Fermi surface due to the SO interaction. 
R. Kadono, M. Hiraishi, M. Miyazaki, K. H. Satoh, S. Takeshita, S.   Kuroiwa, S. Saura, and J. Akimitsu