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arXiv · 1208.4226

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

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

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.

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G. Eguchi, H. Wadati, T. Sugiyama, E. Ikenaga, S. Yonezawa, Y. Maeno. 2012-11-07. Large spin-orbit splitting and weakly-anisotropic superconductivity revealed with single-crystalline noncentrosymmetric CaIrSi3. https://doi.org/10.1103/physrevb.86.184510

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