Evolution of the Electronic Structure of Ultrathin MnBi2Te4 Films

被引：18

作者：

Xu, Runzhe ^{[1
]}

Bai, Yunhe ^{[1
]}

Zhou, Jingsong ^{[1
]}

Li, Jiaheng ^{[1
]}

Gu, Xu ^{[1
]}

Qin, Na ^{[1
]}

Yin, Zhongxu ^{[1
]}

Du, Xian ^{[1
]}

Zhang, Qinqin ^{[1
]}

Zhao, Wenxuan ^{[1
]}

Li, Yidian ^{[1
]}

Wu, Yang ^{[1
]}

Ding, Cui ^{[1
,2
]}

Wang, Lili ^{[1
,3
]}

Liang, Aiji ^{[4
,5
,6
]}

Liu, Zhongkai ^{[4
,5
,6
]}

Xu, Yong ^{[1
]}

Feng, Xiao ^{[1
,3
]}

He, Ke ^{[1
,3
]}

Chen, Yulin ^{[1
,4
,5
,6
,7
]}

Yang, Lexian ^{[1
,3
]}

机构：

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

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

[3] Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China

[4] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[5] Chinese Acad Sci, Shanghai Sci Res Ctr, Shanghai 201210, Peoples R China

[6] ShanghaiTech Lab Topol Phys, Shanghai 200031, Peoples R China

[7] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

来源：

NANO LETTERS | 2022年 / 22卷 / 15期

基金：

国家重点研发计划; 英国工程与自然科学研究理事会; 中国国家自然科学基金;

关键词：

magnetic topological insulator; MnBi2Te4; ultrathin film; Rashba split band; angle-resolved photoemission spectroscopy; INSULATOR; STATE; BAND;

D O I：

10.1021/acs.nanolett.2c02034

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ultrathin films of intrinsic magnetic topological insulator MnBi2Te4 exhibit fascinating quantum properties such as the quantum anomalous Hall effect and the axion insulator state. In this work, we systematically investigate the evolution of the electronic structure of MnBi2Te4 thin films. With increasing film thickness, the electronic structure changes from an insulator type with a large energy gap to one with in-gap topological surface states, which is, however, still in drastic contrast to the bulk material. By surface doping of alkali-metal atoms, a Rashba split band gradually emerges and hybridizes with topological surface states, which not only reconciles the puzzling difference between the electronic structures of the bulk and thin-film MnBi2Te4 but also provides an interesting platform to establish Rashba ferromagnet that is attractive for (quantum) anomalous Hall effect. Our results provide important insights into the understanding and engineering of the intriguing quantum properties of MnBi2Te4 thin films.

引用

页码：6320 / 6327

页数：8

共 53 条

[1] PROJECTOR AUGMENTED-WAVE METHOD [J].

BLOCHL, PE .

PHYSICAL REVIEW B, 1994, 50 (24) :17953-17979

[2]

Chang CZ, 2015, NAT MATER, V14, P473, DOI [10.1038/NMAT4204, 10.1038/nmat4204]

[3] Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator [J].

Chang, Cui-Zu ;

Zhang, Jinsong ;

Feng, Xiao ;

Shen, Jie ;

Zhang, Zuocheng ;

Guo, Minghua ;

Li, Kang ;

Ou, Yunbo ;

Wei, Pang ;

Wang, Li-Li ;

Ji, Zhong-Qing ;

Feng, Yang ;

Ji, Shuaihua ;

Chen, Xi ;

Jia, Jinfeng ;

Dai, Xi ;

Fang, Zhong ;

Zhang, Shou-Cheng ;

He, Ke ;

Wang, Yayu ;

Lu, Li ;

Ma, Xu-Cun ;

Xue, Qi-Kun .

SCIENCE, 2013, 340 (6129) :167-170

[4] Intrinsic magnetic topological insulator phases in the Sb doped MnBi2Te4 bulks and thin flakes [J].

Chen, Bo ;

Fei, Fucong ;

Zhang, Dongqin ;

Zhang, Bo ;

Liu, Wanling ;

Zhang, Shuai ;

Wang, Pengdong ;

Wei, Boyuan ;

Zhang, Yong ;

Zuo, Zewen ;

Guo, Jingwen ;

Liu, Qianqian ;

Wang, Zilu ;

Wu, Xuchuan ;

Zong, Junyu ;

Xie, Xuedong ;

Chen, Wang ;

Sun, Zhe ;

Wang, Shancai ;

Zhang, Yi ;

Zhang, Minhao ;

Wang, Xuefeng ;

Song, Fengqi ;

Zhang, Haijun ;

Shen, Dawei ;

Wang, Baigeng .

NATURE COMMUNICATIONS, 2019, 10 (1)

[5] Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulator MnBi2Te4<bold> </bold> [J].

Chen, Y. J. ;

Xu, L. X. ;

Li, J. H. ;

Li, Y. W. ;

Zhang, C. F. ;

Li, H. ;

Wu, Y. ;

Liang, A. J. ;

Chen, C. ;

Jung, S. W. ;

Cacho, C. ;

Wang, H. Y. ;

Mao, Y. H. ;

Liu, S. ;

Wang, M. X. ;

Guo, Y. F. ;

Xu, Y. ;

Liu, Z. K. ;

Yang, L. X. ;

Chen, Y. L. .

PHYSICAL REVIEW X, 2019, 9 (04)

[6] Quantum anomalous Hall effect in intrinsic magnetic topological insulator MnBi2Te4 [J].

Deng, Yujun ;

Yu, Yijun ;

Shi, Meng Zhu ;

Guo, Zhongxun ;

Xu, Zihan ;

Wang, Jing ;

Chen, Xian Hui ;

Zhang, Yuanbo .

SCIENCE, 2020, 367 (6480) :895-+

[7] Electron-energy-loss spectra and the structural stability of nickel oxide: An LSDA+U study [J].

Dudarev, SL ;

Botton, GA ;

Savrasov, SY ;

Humphreys, CJ ;

Sutton, AP .

PHYSICAL REVIEW B, 1998, 57 (03) :1505-1509

[8] Topological magneto-optical effects and their quantization in noncoplanar antiferromagnets [J].

Feng, Wanxiang ;

Hanke, Jan-Philipp ;

Zhou, Xiaodong ;

Guo, Guang-Yu ;

Bluegel, Stefan ;

Mokrousov, Yuriy ;

Yao, Yugui .

NATURE COMMUNICATIONS, 2020, 11 (01)

[9] High-Chern-number and high-temperature quantum Hall effect without Landau levels [J].

Ge, Jun ;

Liu, Yanzhao ;

Li, Jiaheng ;

Li, Hao ;

Luo, Tianchuang ;

Wu, Yang ;

Xu, Yong ;

Wang, Jian .

NATIONAL SCIENCE REVIEW, 2020, 7 (08) :1280-1287

[10] Experimental Realization of an Intrinsic Magnetic Topological Insulator [J].

Gong, Yan ;

Guo, Jingwen ;

Li, Jiaheng ;

Zhu, Kejing ;

Liao, Menghan ;

Liu, Xiaozhi ;

Zhang, Qinghua ;

Gu, Lin ;

Tang, Lin ;

Feng, Xiao ;

Zhang, Ding ;

Li, Wei ;

Song, Canli ;

Wang, Lili ;

Yu, Pu ;

Chen, Xi ;

Wang, Yayu ;

Yao, Hong ;

Duan, Wenhui ;

Xu, Yong ;

Zhang, Shou-Cheng ;

Ma, Xucun ;

Xue, Qi-Kun ;

He, Ke .

CHINESE PHYSICS LETTERS, 2019, 36 (07)

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