1208.4226 (G. Eguchi et al.)

Large spin-orbit splitting and weakly-anisotropic superconductivity
revealed with single-crystalline noncentrosymmetric CaIrSi3    [PDF]

G. Eguchi, H. Wadati, T. Sugiyama, E. Ikenaga, S. Yonezawa, Y. Maeno

We report normal and superconducting properties of the Rashba-type noncentrosymmetric com- pound CaIrSi3, using single crystalline samples with nearly 100% superconducting volume fraction. The electronic density of states revealed by the hard x-ray photoemission spectroscopy can be well explained by the relativistic first-principle band calculation. This indicates that strong spin-orbit interaction indeed affects the electronic states of this compound. The obtained H - T phase diagram exhibits only approximately 10% anisotropy, indicating that the superconducting properties are almost three dimensional. Nevertheless, strongly anisotropic vortex pinning is observed.

View original: http://arxiv.org/abs/1208.4226