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Quantum Hall states stabilized in semi-magnetic bilayers of topological insulators

Author

Listed:
  • R. Yoshimi

    (University of Tokyo)

  • K. Yasuda

    (University of Tokyo)

  • A. Tsukazaki

    (Institute for Materials Research, Tohoku University
    PRESTO, Japan Science and Technology Agency (JST))

  • K. S. Takahashi

    (RIKEN Center for Emergent Matter Science (CEMS))

  • N. Nagaosa

    (University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

  • M. Kawasaki

    (University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

  • Y. Tokura

    (University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

Abstract

By breaking the time-reversal symmetry in three-dimensional topological insulators with the introduction of spontaneous magnetization or application of magnetic field, the surface states become gapped, leading to quantum anomalous Hall effect or quantum Hall effect, when the chemical potential locates inside the gap. Further breaking of inversion symmetry is possible by employing magnetic topological insulator heterostructures that host non-degenerate top and bottom surface states. Here we demonstrate the tailored-material approach for the realization of robust quantum Hall states in the bilayer system, in which the cooperative or cancelling combination of the anomalous and ordinary Hall responses from the respective magnetic and non-magnetic layers is exemplified. The appearance of quantum Hall states at filling factor 0 and +1 can be understood by the relationship of energy band diagrams for the two independent surface states. The designable heterostructures of magnetic topological insulator may explore a new arena for intriguing topological transport and functionality.

Suggested Citation

  • R. Yoshimi & K. Yasuda & A. Tsukazaki & K. S. Takahashi & N. Nagaosa & M. Kawasaki & Y. Tokura, 2015. "Quantum Hall states stabilized in semi-magnetic bilayers of topological insulators," Nature Communications, Nature, vol. 6(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9530
    DOI: 10.1038/ncomms9530
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    Cited by:

    1. Jiaqi Cai & Dmitry Ovchinnikov & Zaiyao Fei & Minhao He & Tiancheng Song & Zhong Lin & Chong Wang & David Cobden & Jiun-Haw Chu & Yong-Tao Cui & Cui-Zu Chang & Di Xiao & Jiaqiang Yan & Xiaodong Xu, 2022. "Electric control of a canted-antiferromagnetic Chern insulator," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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