Three-dimensional superconducting gap in FeSe from angle-resolved photoemission spectroscopy
Three-dimensional superconducting gap in FeSe from angle-resolved photoemission spectroscopy
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DOI：
10.1103/physrevb.97.180501
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发表时间：
2018-05-02
影响因子：
3.7
通讯作者：
Borisenko, S., V
中科院分区：
文献类型：
--
作者：
Kushnirenko, Y. S.;Fedorov, A., V;Borisenko, S., V
我们对FeSe的超导能隙进行了系统的角分辨光电子能谱研究。差距函数是在包括所有费米面和k（z）依赖性的全布里渊区中确定的。我们发现在所有的动量方向的超导间隙显着的各向异性。虽然面内各向异性可以通过向列性诱导的配对各向异性和轨道选择性配对来解释，但k（z）各向异性需要对理论方法进行额外的改进。
We present a systematic angle-resolved photoemission spectroscopy study of the superconducting gap in FeSe. The gap function is determined in a full Brillouin zone including all Fermi surfaces and k(z) dependence. We find significant anisotropy of the superconducting gap in all momentum directions. While the in-plane anisotropy can be explained by both nematicity-induced pairing anisotropy and orbital-selective pairing, the k(z) anisotropy requires an additional refinement of the theoretical approaches.