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Title: Concurrence of quantum anomalous Hall and topological Hall effects in magnetic topological insulator sandwich heterostructures

Abstract

The quantum anomalous Hall (QAH) effect is a consequence of non-zero Berry curvature in momentum space. The QAH insulator harbours dissipation-free chiral edge states in the absence of an external magnetic field. Yet, the topological Hall (TH) effect, a hallmark of chiral spin textures, is a consequence of real-space Berry curvature. Herein, by inserting a topological insulator (TI) layer between two magnetic TI layers, we realized the concurrence of the TH effect and the QAH effect through electric-field gating. The TH effect is probed by bulk carriers, whereas the QAH effect is characterized by chiral edge states. The appearance of the TH effect in the QAH insulating regime is a consequence of chiral magnetic domain walls that result from the gate-induced Dzyaloshinskii–Moriya interaction and occurs during the magnetization reversal process in the magnetic TI sandwich samples. The coexistence of chiral edge states and chiral spin textures provides a platform for proof-of-concept dis- sipationless spin-textured spintronic applications.

Authors:
 [1]; ORCiD logo [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Pennsylvania State Univ., University Park, PA (United States)
  2. Univ. of New Hampshire, Durham, NH (United States)
Publication Date:
Research Org.:
Univ. of New Hampshire, Durham, NH (United States); Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); Gordon and Betty Moore Foundation; US Army Research Office (ARO); USDOE Office of Science (SC)
OSTI Identifier:
1631267
Alternate Identifier(s):
OSTI ID: 1660957
Grant/Contract Number:  
SC0020221; N-000141512370; DMR-1539916; N00014-15-1-2675; N00014-18-1-2793; SC0016424; DMR-1707340; GBMF9063; W911NF1810198; SC0019064
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Volume: 19; Journal Issue: 7; Journal ID: ISSN 1476-1122
Publisher:
Springer Nature - Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Surfaces, interfaces and thin films; Topological insulators

Citation Formats

Jiang, Jue, Xiao, Di, Wang, Fei, Shin, Jae-Ho, Andreoli, Domenico, Zhang, Jianxiao, Xiao, Run, Zhao, Yi-Fan, Kayyalha, Morteza, Zhang, Ling, Wang, Ke, Zang, Jiadong, Liu, Chaoxing, Samarth, Nitin, Chan, Moses H. W., and Chang, Cui-Zu. Concurrence of quantum anomalous Hall and topological Hall effects in magnetic topological insulator sandwich heterostructures. United States: N. p., 2020. Web. doi:10.1038/s41563-020-0605-z.
Jiang, Jue, Xiao, Di, Wang, Fei, Shin, Jae-Ho, Andreoli, Domenico, Zhang, Jianxiao, Xiao, Run, Zhao, Yi-Fan, Kayyalha, Morteza, Zhang, Ling, Wang, Ke, Zang, Jiadong, Liu, Chaoxing, Samarth, Nitin, Chan, Moses H. W., & Chang, Cui-Zu. Concurrence of quantum anomalous Hall and topological Hall effects in magnetic topological insulator sandwich heterostructures. United States. doi:10.1038/s41563-020-0605-z.
Jiang, Jue, Xiao, Di, Wang, Fei, Shin, Jae-Ho, Andreoli, Domenico, Zhang, Jianxiao, Xiao, Run, Zhao, Yi-Fan, Kayyalha, Morteza, Zhang, Ling, Wang, Ke, Zang, Jiadong, Liu, Chaoxing, Samarth, Nitin, Chan, Moses H. W., and Chang, Cui-Zu. Mon . "Concurrence of quantum anomalous Hall and topological Hall effects in magnetic topological insulator sandwich heterostructures". United States. doi:10.1038/s41563-020-0605-z.
@article{osti_1631267,
title = {Concurrence of quantum anomalous Hall and topological Hall effects in magnetic topological insulator sandwich heterostructures},
author = {Jiang, Jue and Xiao, Di and Wang, Fei and Shin, Jae-Ho and Andreoli, Domenico and Zhang, Jianxiao and Xiao, Run and Zhao, Yi-Fan and Kayyalha, Morteza and Zhang, Ling and Wang, Ke and Zang, Jiadong and Liu, Chaoxing and Samarth, Nitin and Chan, Moses H. W. and Chang, Cui-Zu},
abstractNote = {The quantum anomalous Hall (QAH) effect is a consequence of non-zero Berry curvature in momentum space. The QAH insulator harbours dissipation-free chiral edge states in the absence of an external magnetic field. Yet, the topological Hall (TH) effect, a hallmark of chiral spin textures, is a consequence of real-space Berry curvature. Herein, by inserting a topological insulator (TI) layer between two magnetic TI layers, we realized the concurrence of the TH effect and the QAH effect through electric-field gating. The TH effect is probed by bulk carriers, whereas the QAH effect is characterized by chiral edge states. The appearance of the TH effect in the QAH insulating regime is a consequence of chiral magnetic domain walls that result from the gate-induced Dzyaloshinskii–Moriya interaction and occurs during the magnetization reversal process in the magnetic TI sandwich samples. The coexistence of chiral edge states and chiral spin textures provides a platform for proof-of-concept dis- sipationless spin-textured spintronic applications.},
doi = {10.1038/s41563-020-0605-z},
journal = {Nature Materials},
issn = {1476-1122},
number = 7,
volume = 19,
place = {United States},
year = {2020},
month = {2}
}

Journal Article:
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