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

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arxiv 1208.4226 v2 pith:GV34MZF2 submitted 2012-08-21 cond-mat.supr-con cond-mat.str-el

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 This is my paper
classification cond-mat.supr-con cond-mat.str-el
keywords superconductingcairsi3electronicnoncentrosymmetricpropertiesrevealedspin-orbitstates
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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