论文类型：期刊论文
第一作者：Yong Hu
通讯作者：J-F He,X-H Chen
合写作者：G Xu,YL Chen,CF Zhang,ZK Liu,T Wu,JJ Ying,ZY Wang,Shuting Peng,Aiyun Luo,Mengzhu Shi,Lixuan Xu
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：101
期号：16
页面范围：161113
ISSN号：2469-9950
发表时间：2020-04-23
影响因子：4.036
摘要：The newly discovered magnetic topological insulators (MnBi2Te4) m (Bi2Te3) n are predicted to be a versatile platform for exploring novel topological states. Here, we report angle-resolved photoemission spectroscopy studies on a series of (MnBi2Te4) m (Bi2Te3) n heterostructures. An unexpected but universal gapless Dirac cone is observed on the (MnBi2Te4) terminated (0001) surfaces in all systems, indicating an altered magnetic structure near the surface. The specific band dispersion of the surface states, presumably dominated by the top surface, is found to be sensitive to different stackings of the underlying MnBi2Te4 and Bi2Te3 layers. Our results suggest the high tunability of both magnetic and electronic structures of the topological surface states in (MnBi2Te4) m (Bi2Te3) n heterostructures, which is essential in realizing and manipulating various topological states.