Title | Observation of Magnetism-Induced Topological Edge State in Antiferromagnetic Topological Insulator MnBi4Te7 |
Author | |
Corresponding Author | Zheng, Hao; Jia, Jinfeng |
Publication Years | 2022-06-01
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DOI | |
Source Title | |
ISSN | 1936-0851
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EISSN | 1936-086X
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Volume | 16Pages:9810-9818 |
Abstract | Breaking time reversal symmetry in a topological insulator may lead to quantum anomalous Hall effect and axion insulator phase. MnBi4Te7 is a recently discovered antiferromagnetic topological insulator with TN similar to 12.5 K, which is composed of an alternatively stacked magnetic layer (MnBi2Te4) and nonmagnetic layer (Bi2Te3). By means of scanning tunneling spectroscopy, we clearly observe the electronic state present at a step edge of a magnetic MnBi2Te4 layer but absent at nonmagnetic Bi2Te3 layers at 4.5 K. Furthermore, we find that as the temperature rises above TN the edge state vanishes, while the point defect induced state persists upon an increase in temperature. These results confirm the observation of magnetism-induced edge states. Our analysis based on an axion insulator theory reveals that the nontrivial topological nature of the observed edge state. |
Keywords | |
URL | [Source Record] |
Indexed By | |
Language | English
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Important Publications | NI Journal Papers
|
SUSTech Authorship | Others
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Funding Project | NSFC[11790313,92065201,11874256,11874258,12074247,12174252,11861161003,12025404,11904165]
; Ministry of Science and Technology of China["2019YFA0308600","2020YFA0309000","2017YFA0303203"]
; Strategic Priority Research Program of Chinese Academy of Sciences[XDB28000000]
; Science and Technology Commission of Shanghai Municipality["2019SHZDZX01","19JC1412701","20QA1405100"]
; Natural Science Foundation of Jiangsu Province[BK20190286]
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WOS Research Area | Chemistry
; Science & Technology - Other Topics
; Materials Science
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WOS Subject | Chemistry, Multidisciplinary
; Chemistry, Physical
; Nanoscience & Nanotechnology
; Materials Science, Multidisciplinary
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WOS Accession No | WOS:000820055000001
|
Publisher | |
EI Accession Number | 20222812351699
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EI Keywords | Bismuth compounds
; Electric insulators
; Manganese compounds
; Quantum Hall effect
; Scanning tunneling microscopy
; Tellurium compounds
; Topological insulators
; Topology
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ESI Classification Code | Magnetism: Basic Concepts and Phenomena:701.2
; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4
; Classical Physics; Quantum Theory; Relativity:931
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Data Source | Web of Science
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Citation statistics |
Cited Times [WOS]:3
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Document Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/353384 |
Department | Institute for Quantum Science and Engineering 理学院_物理系 |
Affiliation | 1.Shanghai Jiao Tong Univ, Sch Phys & Astron, Tsung Dao Lee Inst,Shenyang Natl Lab Mat Sci, Key Lab Artificial Struct & Quantum Control,Minis, Shanghai 200240, Peoples R China 2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China 3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China 4.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China 5.Nanjing Univ, Coll Phys, Nanjing 210093, Peoples R China 6.Shanghai Jiao Tong Univ, Zhiyuan Coll, Shanghai 200240, Peoples R China |
Recommended Citation GB/T 7714 |
Xu, Hao-Ke,Gu, Mingqiang,Fei, Fucong,et al. Observation of Magnetism-Induced Topological Edge State in Antiferromagnetic Topological Insulator MnBi4Te7[J]. ACS Nano,2022,16:9810-9818.
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APA |
Xu, Hao-Ke.,Gu, Mingqiang.,Fei, Fucong.,Gu, Yi-Sheng.,Liu, Dang.,...&Jia, Jinfeng.(2022).Observation of Magnetism-Induced Topological Edge State in Antiferromagnetic Topological Insulator MnBi4Te7.ACS Nano,16,9810-9818.
|
MLA |
Xu, Hao-Ke,et al."Observation of Magnetism-Induced Topological Edge State in Antiferromagnetic Topological Insulator MnBi4Te7".ACS Nano 16(2022):9810-9818.
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