Metallic quantized anomalous Hall effect without chiral edge states

被引：4

作者：

Bai, Kai-Zhi ^{[1
]}

Fu, Bo ^{[2
]}

Zhang, Zhenyu ^{[3
]}

Shen, Shun-Qing ^{[1
,4
]}

机构：

[1] Univ Hong Kong, Dept Phys, Pokfulam Rd, Hong Kong, Peoples R China

[2] Great Bay Univ, Sch Sci, Dongguan, Peoples R China

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[4] Quantum Sci Ctr Guangdong Hong Kong Macau Greater, Shenzhen, Peoples R China

来源：

PHYSICAL REVIEW B | 2023年 / 108卷 / 24期

关键词：

3-DIMENSIONAL TOPOLOGICAL INSULATOR; CHERN NUMBER; REALIZATION; CONDUCTANCE; BI2SE3; PHASES;

D O I：

10.1103/PhysRevB.108.L241407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quantum anomalous Hall effect (QAHE) is a topological state of matter with a quantized Hall resistance. It has been observed in some two-dimensional insulating materials such as magnetic topological insulator films and twisted bilayer graphene. These materials are insulating in the bulk but possess chiral edge states carrying the edge current around the system. Here we discover a metallic QAHE in a topological insulator film with a magnetic sandwich heterostructure, in which the Hall conductance is quantized to e(2)/h but the longitudinal conductance remains finite. This effect is attributed to the existence of a pair of massless Dirac cones of surface fermions, with each contributing half of the Hall conductance due to the quantum anomaly. It is not characterized by a Chern number and is not associated with any chiral edge states. Our study offers insights into topological transport phenomena and topological metallic states of matter.

引用

页数：5

共 48 条

[1]

[Anonymous], About us, DOI [10.1103/PhysRevB.108.L241407, DOI 10.1103/PHYSREVB.108.L241407]

[2] Survival of the Quantum Anomalous Hall Effect in Orbital Magnetic Fields as a Consequence of the Parity Anomaly [J].

Boettcher, Jan ;

Tutschku, Christian ;

Molenkamp, Laurens W. ;

Hankiewicz, E. M. .

PHYSICAL REVIEW LETTERS, 2019, 123 (22) :226602

[3]

Chang CZ, 2023, REV MOD PHYS, V95, DOI [10.1103/RevModPhys.95.011002, 10.1103/RevModPhys.96.011002]

[4]

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

[5] 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

[6]

Checkelsky JG, 2014, NAT PHYS, V10, P731, DOI [10.1038/NPHYS3053, 10.1038/nphys3053]

[7] 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)

[8] Full-color monolithic hybrid quantum dot nanoring micro light-emitting diodes with improved efficiency using atomic layer deposition and nonradiative resonant energy transfer [J].

Chen, Sung-Wen Huang ;

Shen, Chih-Chiang ;

Wu, Tingzhu ;

Liao, Zhen-You ;

Chen, Lee-Feng ;

Zhou, Jia-Rou ;

Lee, Chun-Fu ;

Lin, Chih-Hao ;

Lin, Chien-Chung ;

Sher, Chin-Wei ;

Lee, Po-Tsung ;

Tzou, An-Jye ;

Chen, Zhong ;

Kuo, Hao-Chung .

PHOTONICS RESEARCH, 2019, 7 (04) :416-422

[9] 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)

[10] Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3 [J].

Chen, Y. L. ;

Analytis, J. G. ;

Chu, J. -H. ;

Liu, Z. K. ;

Mo, S. -K. ;

Qi, X. L. ;

Zhang, H. J. ;

Lu, D. H. ;

Dai, X. ;

Fang, Z. ;

Zhang, S. C. ;

Fisher, I. R. ;

Hussain, Z. ;

Shen, Z. -X. .

SCIENCE, 2009, 325 (5937) :178-181

← 1 2 3 4 5 →