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 · Tue Jul 17 00:00:00 EDT 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)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1478358

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

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 51 works

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References (52)

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Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications Zhang, Xichao; Zhou, Yan; Mee Song, Kyung Journal of Physics: Condensed Matter, Vol. 32, Issue 14 https://doi.org/10.1088/1361-648x/ab5488	journal	January 2020
A low-temperature Kerr effect microscope for the simultaneous magneto-optic and magneto-transport study of magnetic topological insulators Liu, Jieyi; Singh, Angadjit; Llandro, Justin Measurement Science and Technology, Vol. 30, Issue 12 https://doi.org/10.1088/1361-6501/ab39b4	journal	September 2019
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
Interface-Induced Sign Reversal of the Anomalous Hall Effect in Magnetic Topological Insulator Heterostructures Wang, Fei; Wang, Xuepeng; Zhao, Yi-Fan arXiv https://doi.org/10.48550/arxiv.2004.12560	text	January 2020

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