Abstract
We report normal and superconducting properties of the Rashba-type noncentrosymmetric compound CaIrSi${}_{3}$ 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-principles 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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