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Quantum spin Hall effect in magnetic graphene

Author

Listed:
  • Talieh S. Ghiasi

    (Delft University of Technology
    Harvard University)

  • Davit Petrosyan

    (Delft University of Technology)

  • Josep Ingla-Aynés

    (Delft University of Technology)

  • Tristan Bras

    (Delft University of Technology)

  • Kenji Watanabe

    (National Institute for Materials Science)

  • Takashi Taniguchi

    (National Institute for Materials Science)

  • Samuel Mañas-Valero

    (Delft University of Technology
    University of Valencia)

  • Eugenio Coronado

    (University of Valencia)

  • Klaus Zollner

    (University of Regensburg)

  • Jaroslav Fabian

    (University of Regensburg)

  • Philip Kim

    (Harvard University)

  • Herre S. J. Zant

    (Delft University of Technology)

Abstract

A promising approach to attain long-distance coherent spin propagation is accessing topological spin-polarized edge states in graphene. Achieving this without external magnetic fields necessitates engineering graphene band structure, obtainable through proximity effects in van der Waals heterostructures. In particular, proximity-induced staggered potentials and spin-orbit coupling are expected to form a topological bulk gap in graphene with gapless helical edge states that are robust against disorder. In this work, we detect the spin-polarized helical edge transport in graphene at zero external magnetic field, allowed by the proximity of an interlayer antiferromagnet, CrPS4. We show the coexistence of the quantum spin Hall (QSH) states and magnetism in graphene, where the induced spin-orbit and exchange couplings also give rise to a large anomalous Hall (AH) effect. The detection of the QSH states at zero external magnetic field, together with the AH signal that persists up to room temperature, opens the route for practical applications of magnetic graphene in quantum spintronic circuitries.

Suggested Citation

  • Talieh S. Ghiasi & Davit Petrosyan & Josep Ingla-Aynés & Tristan Bras & Kenji Watanabe & Takashi Taniguchi & Samuel Mañas-Valero & Eugenio Coronado & Klaus Zollner & Jaroslav Fabian & Philip Kim & Her, 2025. "Quantum spin Hall effect in magnetic graphene," Nature Communications, Nature, vol. 16(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60377-1
    DOI: 10.1038/s41467-025-60377-1
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    References listed on IDEAS

    as
    1. A. K. Geim & I. V. Grigorieva, 2013. "Van der Waals heterostructures," Nature, Nature, vol. 499(7459), pages 419-425, July.
    2. A. F. Young & J. D. Sanchez-Yamagishi & B. Hunt & S. H. Choi & K. Watanabe & T. Taniguchi & R. C. Ashoori & P. Jarillo-Herrero, 2014. "Tunable symmetry breaking and helical edge transport in a graphene quantum spin Hall state," Nature, Nature, vol. 505(7484), pages 528-532, January.
    3. K. S. Novoselov & A. K. Geim & S. V. Morozov & D. Jiang & M. I. Katsnelson & I. V. Grigorieva & S. V. Dubonos & A. A. Firsov, 2005. "Two-dimensional gas of massless Dirac fermions in graphene," Nature, Nature, vol. 438(7065), pages 197-200, November.
    4. Yuanbo Zhang & Yan-Wen Tan & Horst L. Stormer & Philip Kim, 2005. "Experimental observation of the quantum Hall effect and Berry's phase in graphene," Nature, Nature, vol. 438(7065), pages 201-204, November.
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