Exchange-biasing topological charges by antiferromagnetism

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.

doi:10.1038/s41467-018-05166-9

Title: Exchange-biasing topological charges by antiferromagnetism

Journal Article · 17 July 2018 · Nature Communications

DOI: https://doi.org/10.1038/s41467-018-05166-9 · OSTI ID:1478358

He, Qing Lin ^[1]; Yin, Gen ^[2];

^[3]; Pan, Lei ^[2]; Che, Xiaoyu ^[2];

^[2]; Gilbert, Dustin A. ^[3]; Disseler, Steven M. ^[3]; Liu, Yizhou ^[4];

^[5]; Zhang, Bin ^[6]; Wu, Yingying ^[2]; Kirby, Brian J. ^[3]; Arenholz, Elke ^[5];

^[4]; Han, Xiaodong ^[6];

^[2]

Univ. of California, Los Angeles, CA (United States); Peking Univ., Beijing (China)
Univ. of California, Los Angeles, CA (United States)
National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
Univ. of California, Riverside, CA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Beijing Univ. of Technology (China)

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.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1478358

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 9; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Tuning the magnetotransport behavior of topological insulator with a transition-metal oxide layer Liao, Liyang; Chen, Peng; Kou, Xufeng Journal of Physics: Condensed Matter, Vol. 31, Issue 40 https://doi.org/10.1088/1361-648x/ab2f53	journal	July 2019
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Coexistence of Surface and Bulk Ferromagnetism Mimics Skyrmion Hall Effect in a Topological Insulator Fijalkowski, K. M.; Hartl, M.; Winnerlein, M. Physical Review X, Vol. 10, Issue 1 https://doi.org/10.1103/physrevx.10.011012	journal	January 2020
A low-temperature Kerr effect microscope for the simultaneous magneto-optic and magneto-transport study of magnetic topological insulators Liu, J.; Singh, A.; Llandro, J. Apollo - University of Cambridge Repository https://doi.org/10.17863/cam.50746	text	January 2019

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