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Title: Exchange-biasing topological charges by antiferromagnetism

Abstract

Geometric Hall effect is induced by the emergent gauge field experienced by the carriers adiabatically passing through certain real-space topological spin textures, which is a probe to non-trivial spin textures, such as magnetic skyrmions. We report experimental indications of spin-texture topological charges induced in heterostructures of a topological insulator (Bi,Sb) 2Te 3 coupled to an antiferromagnet MnTe. Through a seeding effect, the pinned spins at the interface leads to a tunable modification of the averaged real-space topological charge. This effect experimentally manifests as a modification of the field-dependent geometric Hall effect when the system is field-cooled along different directions. This heterostructure represents a platform for manipulating magnetic topological transitions using antiferromagnetic order.

Authors:
 [1];  [2]; ORCiD logo [3];  [2];  [2]; ORCiD logo [2];  [3];  [3];  [4]; ORCiD logo [5];  [6];  [2];  [3];  [5]; ORCiD logo [4];  [6]; ORCiD logo [2]
  1. Univ. of California, Los Angeles, CA (United States); Peking Univ., Beijing (China)
  2. Univ. of California, Los Angeles, CA (United States)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  4. Univ. of California, Riverside, CA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Beijing Univ. of Technology (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1478358
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

He, Qing Lin, Yin, Gen, Grutter, Alexander J., Pan, Lei, Che, Xiaoyu, Yu, Guoqiang, Gilbert, Dustin A., Disseler, Steven M., Liu, Yizhou, Shafer, Padraic, Zhang, Bin, Wu, Yingying, Kirby, Brian J., Arenholz, Elke, Lake, Roger K., Han, Xiaodong, and Wang, Kang L. Exchange-biasing topological charges by antiferromagnetism. United States: N. p., 2018. Web. doi:10.1038/s41467-018-05166-9.
He, Qing Lin, Yin, Gen, Grutter, Alexander J., Pan, Lei, Che, Xiaoyu, Yu, Guoqiang, Gilbert, Dustin A., Disseler, Steven M., Liu, Yizhou, Shafer, Padraic, Zhang, Bin, Wu, Yingying, Kirby, Brian J., Arenholz, Elke, Lake, Roger K., Han, Xiaodong, & Wang, Kang L. Exchange-biasing topological charges by antiferromagnetism. United States. doi:10.1038/s41467-018-05166-9.
He, Qing Lin, Yin, Gen, Grutter, Alexander J., Pan, Lei, Che, Xiaoyu, Yu, Guoqiang, Gilbert, Dustin A., Disseler, Steven M., Liu, Yizhou, Shafer, Padraic, Zhang, Bin, Wu, Yingying, Kirby, Brian J., Arenholz, Elke, Lake, Roger K., Han, Xiaodong, and Wang, Kang L. Tue . "Exchange-biasing topological charges by antiferromagnetism". United States. doi:10.1038/s41467-018-05166-9. https://www.osti.gov/servlets/purl/1478358.
@article{osti_1478358,
title = {Exchange-biasing topological charges by antiferromagnetism},
author = {He, Qing Lin and Yin, Gen and Grutter, Alexander J. and Pan, Lei and Che, Xiaoyu and Yu, Guoqiang and Gilbert, Dustin A. and Disseler, Steven M. and Liu, Yizhou and Shafer, Padraic and Zhang, Bin and Wu, Yingying and Kirby, Brian J. and Arenholz, Elke and Lake, Roger K. and Han, Xiaodong and Wang, Kang L.},
abstractNote = {Geometric Hall effect is induced by the emergent gauge field experienced by the carriers adiabatically passing through certain real-space topological spin textures, which is a probe to non-trivial spin textures, such as magnetic skyrmions. We report experimental indications of spin-texture topological charges induced in heterostructures of a topological insulator (Bi,Sb)2Te3 coupled to an antiferromagnet MnTe. Through a seeding effect, the pinned spins at the interface leads to a tunable modification of the averaged real-space topological charge. This effect experimentally manifests as a modification of the field-dependent geometric Hall effect when the system is field-cooled along different directions. This heterostructure represents a platform for manipulating magnetic topological transitions using antiferromagnetic order.},
doi = {10.1038/s41467-018-05166-9},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {2018},
month = {7}
}

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