气候变化领域集成服务门户(CCPortal): Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator

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DOI	10.1016/j.scib.2020.07.032
	Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator
	Xu L.; Mao Y.; Wang H.; Li J.; Chen Y.; Xia Y.; Li Y.; Pei D.; Zhang J.; Zheng H.; Huang K.; Zhang C.; Cui S.; Liang A.; Xia W.; Su H.; Jung S.; Cacho C.; Wang M.; Li G.; Xu Y.; Guo Y.; Yang L.; Liu Z.; Chen Y.; Jiang M.
发表日期	2020
ISSN	20959273
起始页码	2086
结束页码	2093
卷号	65 期号:24
英文摘要	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 spatial- and angle-resolved 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. © 2020 Science China Press
关键词	Electronic band structure Magnetic topological insulator Quantum anomalous Hall effect Spatially resolved angle-resolved photoemission spectroscopy
英文关键词	Antiferromagnetism; Electric insulators; Electronic structure; Manganese compounds; Photoelectron spectroscopy; Surface states; Temperature distribution; Topological insulators; Topology; Angle resolved photoemission spectroscopy; Anomalous hall effects; Antiferromagnetics; Insulator phase; Temperature dependence; Bismuth compounds
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207249
作者单位	Center for Excellence in Superconducting Electronics, State Key Laboratory of Functional Material for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China; School of Physical Science and Technology, ShanghaiTech University and CAS-Shanghai Science Research Center, Shanghai, 201210, China; ShanghaiTech Laboratory for Topological Physics, Shanghai, 200031, China; University of Chinese Academy of Sciences, Beijing, 100049, China; College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, 410073, China; State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, 100084, China; Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, United Kingdom; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Diamond Light Source, Harwell Campus, Didcot, OX11 0DE, United Kingdom; Fron...
推荐引用方式 GB/T 7714	Xu L.,Mao Y.,Wang H.,et al. Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator[J],2020,65(24).
APA	Xu L..,Mao Y..,Wang H..,Li J..,Chen Y..,...&Jiang M..(2020).Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator.Science Bulletin,65(24).
MLA	Xu L.,et al."Persistent surface states with diminishing gap in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator".Science Bulletin 65.24(2020).