Back to Search Start Over

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

Authors :
Xiao, Run
Xiao, Di
Jiang, Jue
Shin, Jae-Ho
Wang, Fei
Zhao, Yi-Fan
Zhang, Ruo-Xi
Richardella, Anthony
Wang, Ke
Kayyalha, Morteza
Chan, Moses H. W.
Liu, Chao-Xing
Chang, Cui-Zu
Samarth, Nitin
Source :
Phys. Rev. Research 3, 032004 (2021)
Publication Year :
2021

Abstract

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 new route for understanding and manipulating chiral magnetic spin textures in real space.<br />Comment: Minor corrections to original submission

Details

Database :
arXiv
Journal :
Phys. Rev. Research 3, 032004 (2021)
Publication Type :
Report
Accession number :
edsarx.2103.05821
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevResearch.3.L032004