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作者:

Che, Xiaoyu (Che, Xiaoyu.) | Murata, Koichi (Murata, Koichi.) | Pan, Lei (Pan, Lei.) | He, Qing Lin (He, Qing Lin.) | Yu, Guoqiang (Yu, Guoqiang.) | Shao, Qiming (Shao, Qiming.) | Yin, Gen (Yin, Gen.) | Deng, Peng (Deng, Peng.) | Fan, Yabin (Fan, Yabin.) | Ma, Bo (Ma, Bo.) | Liang, Xiao (Liang, Xiao.) | Zhang, Bin (Zhang, Bin.) | Han, Xiaodong (Han, Xiaodong.) (学者:韩晓东) | Bi, Lei (Bi, Lei.) | Yang, Qing-Hui (Yang, Qing-Hui.) | Zhang, Huaiwu (Zhang, Huaiwu.) | Wang, Kang L. (Wang, Kang L..)

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摘要:

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). In this article, 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.

关键词:

interface magnetic insulator magnetic proximity effect quantum interference topological insulator wet transfer

作者机构:

  • [ 1 ] [Che, Xiaoyu]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 2 ] [Murata, Koichi]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 3 ] [Pan, Lei]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 4 ] [He, Qing Lin]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 5 ] [Yu, Guoqiang]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 6 ] [Shao, Qiming]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 7 ] [Yin, Gen]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 8 ] [Deng, Peng]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 9 ] [Fan, Yabin]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 10 ] [Wang, Kang L.]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA
  • [ 11 ] [Yu, Guoqiang]Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
  • [ 12 ] [Ma, Bo]Univ Elect Sci & Technol China, State Key Lab Elect Thin Film & Integrated Device, Chengdu 610054, Sichuan, Peoples R China
  • [ 13 ] [Yang, Qing-Hui]Univ Elect Sci & Technol China, State Key Lab Elect Thin Film & Integrated Device, Chengdu 610054, Sichuan, Peoples R China
  • [ 14 ] [Zhang, Huaiwu]Univ Elect Sci & Technol China, State Key Lab Elect Thin Film & Integrated Device, Chengdu 610054, Sichuan, Peoples R China
  • [ 15 ] [Liang, Xiao]Univ Elect Sci & Technol China, Natl Engn Res Ctr Electromagnet Radiat Control Ma, Chengdu 610054, Sichuan, Peoples R China
  • [ 16 ] [Bi, Lei]Univ Elect Sci & Technol China, Natl Engn Res Ctr Electromagnet Radiat Control Ma, Chengdu 610054, Sichuan, Peoples R China
  • [ 17 ] [Zhang, Bin]Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 18 ] [Han, Xiaodong]Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 19 ] [Wang, Kang L.]Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

通讯作者信息:

  • [Wang, Kang L.]Univ Calif Los Angeles, Dept Elect & Comp Engn, Los Angeles, CA 90095 USA;;[Wang, Kang L.]Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

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ACS NANO

ISSN: 1936-0851

年份: 2018

期: 5

卷: 12

页码: 5042-5050

1 7 . 1 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:98

JCR分区:1

被引次数:

WoS核心集被引频次: 41

SCOPUS被引频次: 36

ESI高被引论文在榜: 0 展开所有

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