Quantum spin Hall effect in magnetic graphene
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, CrPS<sub>4</sub>. 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.
Authors
- Samuel Mañas‐Valero (ORCID: https://orcid.org/0000-0001-6319-9238)
- Jaroslav Fabian (ORCID: https://orcid.org/0000-0002-3009-4525)
- Herre S. J. van der Zant (ORCID: https://orcid.org/0000-0002-5385-0282)
- Davit Petrosyan (ORCID: https://orcid.org/0009-0007-7446-2952)
- Eugenio Coronado (ORCID: https://orcid.org/0000-0002-1848-8791)
- Philip Kim (ORCID: https://orcid.org/0000-0002-8255-0086)
- Klaus Zollner (ORCID: https://orcid.org/0000-0002-6239-3271)
- Josep Ingla‐Aynés (ORCID: https://orcid.org/0000-0001-9179-1570)
- Talieh S. Ghiasi (ORCID: https://orcid.org/0000-0002-3490-5356)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Tristan Bras
Institutions
- Harvard University (US)
- National Institute for Materials Science (JP)
- Parc Científic de la Universitat de València (ES)
- Harvard University Press (US)
- University of Regensburg (DE)
- Delft University of Technology (NL)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-06-24
- DOI
- https://doi.org/10.1038/s41467-025-60377-1
- Citations
- 6
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 3.11
Funders
- European Commission
- Deutsche Forschungsgemeinschaft
- Ministry of Education, Culture, Sports, Science and Technology
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek
- Universitat de València
- Japan Society for the Promotion of Science