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Exchange-biasing topological charges by antiferromagnetism

Author

Listed:
  • Qing Lin He

    (University of California
    Peking University)

  • Gen Yin

    (University of California)

  • Alexander J. Grutter

    (National Institute of Standards and Technology)

  • Lei Pan

    (University of California)

  • Xiaoyu Che

    (University of California)

  • Guoqiang Yu

    (University of California)

  • Dustin A. Gilbert

    (National Institute of Standards and Technology)

  • Steven M. Disseler

    (National Institute of Standards and Technology)

  • Yizhou Liu

    (University of California)

  • Padraic Shafer

    (Lawrence Berkeley National Laboratory)

  • Bin Zhang

    (Beijing University of Technology)

  • Yingying Wu

    (University of California)

  • Brian J. Kirby

    (National Institute of Standards and Technology)

  • Elke Arenholz

    (Lawrence Berkeley National Laboratory)

  • Roger K. Lake

    (University of California)

  • Xiaodong Han

    (Beijing University of Technology)

  • Kang L. Wang

    (University of California)

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)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.

Suggested Citation

  • Qing Lin He & Gen Yin & Alexander J. Grutter & Lei Pan & Xiaoyu Che & Guoqiang Yu & Dustin A. Gilbert & Steven M. Disseler & Yizhou Liu & Padraic Shafer & Bin Zhang & Yingying Wu & Brian J. Kirby & El, 2018. "Exchange-biasing topological charges by antiferromagnetism," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05166-9
    DOI: 10.1038/s41467-018-05166-9
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