Experimental Realization of an Intrinsic Magnetic Topological Insulator

被引：579

作者：

Gong, Yan ^{[1
]}

Guo, Jingwen ^{[1
]}

Li, Jiaheng ^{[1
]}

Zhu, Kejing ^{[1
]}

Liao, Menghan ^{[1
]}

Liu, Xiaozhi ^{[2
]}

Zhang, Qinghua ^{[2
]}

Gu, Lin ^{[2
]}

Tang, Lin ^{[1
]}

Feng, Xiao ^{[1
]}

Zhang, Ding ^{[1
,3
,4
]}

Li, Wei ^{[1
,4
]}

Song, Canli ^{[1
,4
]}

Wang, Lili ^{[1
,4
]}

Yu, Pu ^{[1
,4
]}

Chen, Xi ^{[1
,4
]}

Wang, Yayu ^{[1
,3
,4
]}

Yao, Hong ^{[4
,5
]}

Duan, Wenhui ^{[1
,3
,4
]}

Xu, Yong ^{[1
,4
,6
]}

Zhang, Shou-Cheng ^{[7
]}

Ma, Xucun ^{[1
,4
]}

Xue, Qi-Kun ^{[1
,3
,4
]}

He, Ke ^{[1
,3
,4
]}

机构：

[1] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China

[4] Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China

[5] Tsinghua Univ, Inst Adv Study, Beijing 100084, Peoples R China

[6] RIKEN, CEMS, Wako, Saitama 3510198, Japan

[7] Stanford Univ, Stanford Ctr Topol Quantum Phys, Dept Phys, Stanford, CA 94305 USA

来源：

CHINESE PHYSICS LETTERS | 2019年 / 36卷 / 07期

基金：

美国国家科学基金会;

关键词：

DIRAC FERMIONS; CRYSTAL; BI2TE3;

D O I：

10.1088/0256-307X/36/7/076801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An intrinsic magnetic topological insulator (TI) is a stoichiometric magnetic compound possessing both inherent magnetic order and topological electronic states. Such a material can provide a shortcut to various novel topological quantum effects but remained elusive experimentally for a long time. Here we report the experimental realization of thin films of an intrinsic magnetic TI, MnBi2Te4, by alternate growth of a Bi2Te3 quintuple layer and a MnTe bilayer with molecular beam epitaxy. The material shows the archetypical Dirac surface states in angle-resolved photoemission spectroscopy and is demonstrated to be an antiferromagnetic topological insulator with ferromagnetic surfaces by magnetic and transport measurements as well as first-principles calculations. The unique magnetic and topological electronic structures and their interplays enable the material to embody rich quantum phases such as quantum anomalous Hall insulators and axion insulators at higher temperature and in a well-controlled way.

引用

页数：6

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