Mapping the phase diagram of the quantum anomalous Hall and topological Hall effects in a dual-gated magnetic topological insulator heterostructure

被引：5

作者：

Xiao, Run ^{[1
]}

Xiao, Di ^{[1
]}

Jiang, Jue ^{[1
]}

Shin, Jae-Ho ^{[1
]}

Wang, Fei ^{[1
]}

Zhao, Yi-Fan ^{[1
]}

Zhang, Ruo-Xi ^{[1
]}

Richardella, Anthony ^{[1
,2
]}

Wang, Ke ^{[2
]}

Kayyalha, Morteza ^{[3
]}

Chan, Moses H. W. ^{[1
]}

Liu, Chao-Xing ^{[1
]}

Chang, Cui-Zu ^{[1
]}

Samarth, Nitin ^{[1
]}

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW RESEARCH | 2021年 / 3卷 / 03期

基金：

美国国家科学基金会;

关键词：

REALIZATION; STATE;

D O I：

10.1103/PhysRevResearch.3.L032004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use magnetotransport in dual-gated magnetic topological insulator heterostructures to map out a phase diagram of the topological Hall and quantum anomalous Hall effects as a function of the chemical potential (primarily determined by the back gate voltage) and the asymmetric potential (primarily determined by the top gate voltage). A theoretical model that includes both surface states and valence band quantum well states allows the evaluation of the variation of the Dzyaloshinskii-Moriya interaction and carrier density with gate voltages. The qualitative agreement between experiment and theory provides strong evidence for the existence of a topological Hall effect in the system studied, opening up a route for understanding and manipulating chiral magnetic spin textures in real space.

引用

页数：6

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