Hidden sign-changing s-wave superconductivity in monolayer FeSe
Hidden sign-changing s-wave superconductivity in monolayer FeSe
复制标题
单层 FeSe 中隐藏的符号变化 s 波超导
DOI：
10.1103/physrevb.94.144512
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发表时间：
2016
影响因子：
3.7
通讯作者：
Wang Qiang-Hua
中科院分区：
文献类型：
--
作者：
Gao Yi;Yu Yan;Zhou Tao;Huang Huaixiang;Wang Qiang-Hua
结合最近的扫描隧道显微镜（STM）和角度分辨光谱学（ARPES）测量，我们构建了一个适合描述单层FeSe的能带结构的紧密结合模型。然后，我们提出了一个可能的配对函数，它可以很好地描述ARPES观测到的间隙各向异性，并且具有隐藏的符号变化特征。最后，作为对这一配对函数的检验，我们进一步研究了非磁性杂质诱导的束缚态，将在未来的STM实验中得到验证。
Combining the recent scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES) measurements, we construct a tight-binding model suitable for describing the band structure of monolayer FeSe grown on. Then we propose a possible pairing function, which can well describe the gap anisotropy observed by ARPES and has a hidden sign-changing characteristic. Finally, as a test of this pairing function, we further study the nonmagnetic impurity-induced bound states, to be verified by future STM experiments.