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Title: Proximity-Induced Magnetic Order in a Transferred Topological Insulator Thin Film on a Magnetic Insulator

Abstract

Breaking the time reversal symmetry (TRS) in a topological insulator (TI) by introducing a magnetic order gives rise to exotic quantum phenomena. One of the promising routes to inducing a magnetic order in a TI is utilizing magnetic proximity effect between a TI and a strong magnetic insulator (MI). Here, we demonstrate a TI/MI heterostructure prepared through transferring a molecular beam epitaxy (MBE)-grown Bi 2Se 3 film onto a yttrium iron garnet (YIG) substrate via wet transfer. The transferred Bi 2Se 3 exhibits excellent quality over a large scale. Moreover, through wet transfer we are able to engineer the interface and perform a comparative study to probe the proximity coupling between Bi 2Se 3 and YIG under different interface conditions. A detailed investigation of both the anomalous Hall effect and quantum corrections to the conductivity in magnetotransport measurements reveals an induced magnetic order as well as TRS breaking in the transferred Bi 2Se 3 film on YIG. In contrast, a thin layer of AlO x at the interface obstructs the proximity coupling and preserves the TRS, indicating the critical role of the interface in mediating magnetic proximity effect.

Authors:
ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1];  [1];  [1];  [1];  [3];  [3];  [4]; ORCiD logo [4]; ORCiD logo [3];  [3];  [3]; ORCiD logo [1]
  1. Univ. of California, Los Angeles, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States); Chinese Academy of Sciences (CAS), Beijing (China)
  3. Univ. of Electronic Science and Technology of China, Chengdu (China)
  4. Beijing Univ. of Technology (China)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1566357
Grant/Contract Number:  
SC0012670; SC000686
Resource Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 12; Journal Issue: 5; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics; topological insulator; magnetic insulator; wet transfer; magnetic proximity effect; interface; quantum interference

Citation Formats

Che, Xiaoyu, Murata, Koichi, Pan, Lei, He, Qing Lin, Yu, Guoqiang, Shao, Qiming, Yin, Gen, Deng, Peng, Fan, Yabin, Ma, Bo, Liang, Xiao, Zhang, Bin, Han, Xiaodong, Bi, Lei, Yang, Qing-Hui, Zhang, Huaiwu, and Wang, Kang L. Proximity-Induced Magnetic Order in a Transferred Topological Insulator Thin Film on a Magnetic Insulator. United States: N. p., 2018. Web. doi:10.1021/acsnano.8b02647.
Che, Xiaoyu, Murata, Koichi, Pan, Lei, He, Qing Lin, Yu, Guoqiang, Shao, Qiming, Yin, Gen, Deng, Peng, Fan, Yabin, Ma, Bo, Liang, Xiao, Zhang, Bin, Han, Xiaodong, Bi, Lei, Yang, Qing-Hui, Zhang, Huaiwu, & Wang, Kang L. Proximity-Induced Magnetic Order in a Transferred Topological Insulator Thin Film on a Magnetic Insulator. United States. doi:10.1021/acsnano.8b02647.
Che, Xiaoyu, Murata, Koichi, Pan, Lei, He, Qing Lin, Yu, Guoqiang, Shao, Qiming, Yin, Gen, Deng, Peng, Fan, Yabin, Ma, Bo, Liang, Xiao, Zhang, Bin, Han, Xiaodong, Bi, Lei, Yang, Qing-Hui, Zhang, Huaiwu, and Wang, Kang L. Mon . "Proximity-Induced Magnetic Order in a Transferred Topological Insulator Thin Film on a Magnetic Insulator". United States. doi:10.1021/acsnano.8b02647. https://www.osti.gov/servlets/purl/1566357.
@article{osti_1566357,
title = {Proximity-Induced Magnetic Order in a Transferred Topological Insulator Thin Film on a Magnetic Insulator},
author = {Che, Xiaoyu and Murata, Koichi and Pan, Lei and He, Qing Lin and Yu, Guoqiang and Shao, Qiming and Yin, Gen and Deng, Peng and Fan, Yabin and Ma, Bo and Liang, Xiao and Zhang, Bin and Han, Xiaodong and Bi, Lei and Yang, Qing-Hui and Zhang, Huaiwu and Wang, Kang L.},
abstractNote = {Breaking the time reversal symmetry (TRS) in a topological insulator (TI) by introducing a magnetic order gives rise to exotic quantum phenomena. One of the promising routes to inducing a magnetic order in a TI is utilizing magnetic proximity effect between a TI and a strong magnetic insulator (MI). Here, we demonstrate a TI/MI heterostructure prepared through transferring a molecular beam epitaxy (MBE)-grown Bi2Se3 film onto a yttrium iron garnet (YIG) substrate via wet transfer. The transferred Bi2Se3 exhibits excellent quality over a large scale. Moreover, through wet transfer we are able to engineer the interface and perform a comparative study to probe the proximity coupling between Bi2Se3 and YIG under different interface conditions. A detailed investigation of both the anomalous Hall effect and quantum corrections to the conductivity in magnetotransport measurements reveals an induced magnetic order as well as TRS breaking in the transferred Bi2Se3 film on YIG. In contrast, a thin layer of AlOx at the interface obstructs the proximity coupling and preserves the TRS, indicating the critical role of the interface in mediating magnetic proximity effect.},
doi = {10.1021/acsnano.8b02647},
journal = {ACS Nano},
number = 5,
volume = 12,
place = {United States},
year = {2018},
month = {5}
}

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