Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator
2020-12-30
发表期刊SCIENCE BULLETIN (IF:18.8[JCR-2023],15.8[5-Year])
ISSN2095-9273
卷号65期号:24页码:2086-2093
发表状态已发表
DOI10.1016/j.scib.2020.07.032
摘要

Magnetic topological quantum materials (TQMs) provide a fertile ground for the emergence of fascinating topological magneto-electric effects. Recently, the discovery of intrinsic antiferromagnetic (AFM) topological insulator MnBi2Te4 that could realize quantized anomalous Hall effect and axion insulator phase ignited intensive study on this family of TQM compounds. Here, we investigated the AFM compound MnBi4Te7 where Bi2Te3 and MnBi2Te4 layers alternate to form a superlattice. Using spatialand angleresolved photoemission spectroscopy, we identified ubiquitous (albeit termination dependent) topological electronic structures from both Bi2Te3 and MnBi2Te4 terminations. Unexpectedly, while the bulk bands show strong temperature dependence correlated with the AFM transition, the topological surface states with a diminishing gap show negligible temperature dependence across the AFM transition. Together with the results of its sister compound MnBi2Te4, we illustrate important aspects of electronic structures and the effect of magnetic ordering in this family of magnetic TQMs. (c) 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.

关键词Spatially resolved angle-resolved photoemission spectroscopy Electronic band structure Quantum anomalous Hall effect Magnetic topological insulator
收录类别SCI ; SCIE ; EI
资助项目National Key Research and Development Program of China[2017YFA0305400][2017YFA0304600][2018YFA0307100][2018YFA0305603] ; National Natural Science Foundation of China[11774190][11674229][11634009][11774427][51788104][11874035] ; EPSRC Platform Grant[EP/M020517/1] ; Shanghai Pujiang Program[17PJ1406200]
WOS研究方向Science & Technology - Other Topics
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000600068900016
出版者ELSEVIER
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文献类型期刊论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/124935
专题物质科学与技术学院_博士生
物质科学与技术学院
物质科学与技术学院_PI研究组_柳仲楷组
物质科学与技术学院_PI研究组_郭艳峰组
物质科学与技术学院_PI研究组_李刚组
物质科学与技术学院_特聘教授组_陈宇林
物质科学与技术学院_硕士生
物质科学与技术学院_公共科研平台_拓扑物理实验室
通讯作者Chen, Yujie; Yang, Lexian; Liu, Zhongkai; Chen, Yulin
作者单位
1.Chinese Acad Sci, Ctr Excellence Superconducting Elect, State Key Lab Funct Mat Informat, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China
2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
3.CAS Shanghai Sci Res Ctr, Shanghai 201210, Peoples R China
4.ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China
7.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China
8.Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England
9.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
10.Diamond Light Source, Harwell Campus, Didcot OX11 0DE, Oxon, England
11.Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China
12.RIKEN Ctr Emergent Matter Sci CEMS, Wako, Saitama 3510198, Japan
第一作者单位物质科学与技术学院;  上海科技大学
通讯作者单位物质科学与技术学院;  上海科技大学
推荐引用方式
GB/T 7714
Xu, Lixuan,Mao, Yuanhao,Wang, Hongyuan,et al. Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator[J]. SCIENCE BULLETIN,2020,65(24):2086-2093.
APA Xu, Lixuan.,Mao, Yuanhao.,Wang, Hongyuan.,Li, Jiaheng.,Chen, Yujie.,...&Jiang, Mianheng.(2020).Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator.SCIENCE BULLETIN,65(24),2086-2093.
MLA Xu, Lixuan,et al."Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator".SCIENCE BULLETIN 65.24(2020):2086-2093.
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