Large spin-orbit splitting and weakly anisotropic superconductivity revealed with single-crystalline noncentrosymmetric CaIrSi_3
Large spin-orbit splitting and weakly anisotropic superconductivity revealed with single-crystalline noncentrosymmetric CaIrSi_3
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单晶非中心对称 CaIrSi_3 揭示大自旋轨道分裂和弱各向异性超导
DOI：
10.1103/physrevb.86.184510
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发表时间：
2012
影响因子：
3.7
通讯作者：
前野悦輝
中科院分区：
文献类型：
--
作者：
江口学;和達大樹;杉山武晴;池永英司;米澤進吾;前野悦輝
本文报道了Rashba型非中心对称化合物CaIrSi的正常和超导性质。硬x射线光电子能谱所揭示的电子态密度可以用相对论第一性原理能带计算得到很好的解释。这表明强的自旋轨道相互作用确实影响了该化合物的电子态。所得到的相图仅显示出约10 °的各向异性，表明超导性质几乎是三维的。然而，观察到了强烈的各向异性涡旋钉扎。
We report normal and superconducting properties of the Rashba-type noncentrosymmetric compound CaIrSiusing single crystalline samples with nearly 100superconducting 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-phase diagram exhibits only approximately 10anisotropy, indicating that the superconducting properties are almost three dimensional. Nevertheless, strongly anisotropic vortex pinning is observed.