Observation of the Zero Hall Plateau in a Quantum Anomalous Hall Insulator

被引：106

作者：

Feng, Yang ^{[1
]}

Feng, Xiao ^{[1
]}

Ou, Yunbo ^{[1
,2
]}

Wang, Jing ^{[3
]}

Liu, Chang ^{[1
]}

Zhang, Liguo ^{[1
]}

Zhao, Dongyang ^{[1
]}

Jiang, Gaoyuan ^{[1
]}

Zhang, Shou-Cheng ^{[3
,4
]}

He, Ke ^{[1
,4
]}

Ma, Xucun ^{[1
,4
]}

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

Wang, Yayu ^{[1
,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 100190, Peoples R China

[3] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 12期

基金：

中国国家自然科学基金;

关键词：

FERROMAGNETIC TOPOLOGICAL INSULATOR; PHASE-TRANSITIONS; STATE;

D O I：

10.1103/PhysRevLett.115.126801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report experimental investigations on the quantum phase transition between the two opposite Hall plateaus of a quantum anomalous Hall insulator. We observe a well-defined plateau with zero Hall conductivity over a range of magnetic field around coercivity when the magnetization reverses. The features of the zero Hall plateau are shown to be closely related to that of the quantum anomalous Hall effect, but its temperature evolution exhibits a significant difference from the network model for a conventional quantum Hall plateau transition. We propose that the chiral edge states residing at the magnetic domain boundaries, which are unique to a quantum anomalous Hall insulator, are responsible for the novel features of the zero Hall plateau.

引用

页数：5

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