Fully gapped s-wave-like superconducting state and electronic structure in Ir0.95Pd0.05Te2 single crystals with strong spin-orbital coupling
Fully gapped s-wave-like superconducting state and electronic structure in Ir0.95Pd0.05Te2 single crystals with strong spin-orbital coupling
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具有强自旋轨道耦合的 Ir0.95Pd0.05Te2 单晶中全能隙类 s 波超导态和电子结构
DOI：
10.1103/physrevb.89.100501
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发表时间：
2014-02
影响因子：
3.7
通讯作者：
Jia, Jin-feng
中科院分区：
文献类型：
--
作者：
Guan, D. D.;Gao, C. L.;Qian, Dong;Jia, Jin-feng
由于层状5d过渡金属硫族化合物中的大的自旋-轨道耦合，在Ir 2-xPdxTe 2中的超导性的发生提供了一个很好的机会，在该系统中寻找可能的拓扑超导态。我们对Ir_（0.95）Pd_（0.05）Te_2单晶样品的超导性能和电子结构进行了全面的研究。实验测量了超导带隙尺寸、临界场和沿着不同方向的相干长度。宏观体测量和微观低温扫描隧道光谱的结果表明，Ir0.95Pd0.05Te2具有BCS类s波状态。在0.4K时，在涡核中没有发现零偏压电导峰的迹象。
Due to the large spin-orbital coupling in the layered 5d-transition metal chalcogenides compound, the occurrence of superconductivity in Ir2-xPdxTe2 offers a good chance to search for possible topological superconducting states in this system. We did comprehensive studies on the superconducting properties and electronic structures of single crystalline Ir0.95Pd0.05Te2 samples. The superconducting gap size, critical fields and coherence length along different directions were experimentally determined. Macroscopic bulk measurements and microscopic low temperature scanning tunneling spectroscopy results suggest that Ir0.95Pd0.05Te2 possesses a BCS-like s-wave state. No sign of zero bias conductance peak were found in the vortex core at 0.4K.