论文类型：期刊论文
第一作者：Zhijun Wang
通讯作者：Zhong Fang,Xi Dai,Hong Ding
合写作者：Alexei V Fedorov,P Richard,Hongming Weng,Tian Qian,Xiaoyan Xu,Hu Miao,LK Zeng,Gang Xu,Peng Zhang
发表刊物：Physical Review B
收录刊物：SCI
学科门类：理学
一级学科：物理学
文献类型：J
卷号：92
期号：11
页面范围：115119
ISSN号：1098-0121
发表时间：2015-09-08
影响因子：3.718
摘要：We demonstrate, using first-principles calculations, that the electronic structure of FeSe 1− x Te x (x= 0.5) is topologically nontrivial and characterized by an odd Z 2 invariant and Dirac cone type surface states, in sharp contrast to the end member FeSe (x= 0). This topological state is induced by the enhanced three-dimensionality and spin-orbit coupling due to Te substitution (compared to FeSe), and characterized by a band inversion at the Z point of the Brillouin zone, which is confirmed by our ARPES measurements. The results suggest that the surface of FeSe 0.5 Te 0.5 may support a nontrivial superconducting channel in proximity to the bulk.
发布期刊链接：https://journals.aps.org/prb/abstract/10.1103/PhysRevB.92.115119