Proximity-Induced Exchange Interaction and Prolonged Valley Lifetime in MoSe<sub>2</sub>/CrSBr Van-Der-Waals Heterostructure with Orthogonal Spin Textures
Heterostructures, composed of semiconducting transition-metal dichalcogenides (TMDC) and magnetic van-der-Waals materials, offer exciting prospects for the manipulation of the TMDC valley properties via proximity interaction with the magnetic material. We show that the atomic proximity of monolayer MoSe<sub>2</sub> and the antiferromagnetic van-der-Waals crystal CrSBr leads to an unexpected breaking of time-reversal symmetry, with originally perpendicular spin directions in both materials. The observed effect can be traced back to a proximity-induced exchange interaction via first-principles calculations. The resulting spin splitting in MoSe<sub>2</sub> is determined experimentally and theoretically to be on the order of a few meV. Moreover, we find a more than 2 orders of magnitude longer valley lifetime of spin-polarized charge carriers in the heterostructure, as compared to monolayer MoSe<sub>2</sub>/SiO<sub>2</sub>, driven by a Mott transition in the type-III band-aligned heterostructure.
Authors
- Samuel Mañas‐Valero (ORCID: https://orcid.org/0000-0001-6319-9238)
- Andreas Beer (ORCID: https://orcid.org/0000-0002-8833-0447)
- Jaroslav Fabian (ORCID: https://orcid.org/0000-0002-3009-4525)
- Caique Serati de Brito (ORCID: https://orcid.org/0000-0003-3992-1731)
- Herre S. J. van der Zant (ORCID: https://orcid.org/0000-0002-5385-0282)
- Philipp Parzefall (ORCID: https://orcid.org/0000-0001-5015-329X)
- Carla Boix‐Constant (ORCID: https://orcid.org/0000-0003-3213-5906)
- Klaus Zollner (ORCID: https://orcid.org/0000-0002-6239-3271)
- Josep Ingla‐Aynés (ORCID: https://orcid.org/0000-0001-9179-1570)
- Christian Schüller (ORCID: https://orcid.org/0000-0002-6043-5263)
- 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)
- Paulo E. Faria (ORCID: https://orcid.org/0000-0002-1161-2059)
- Y. Galvão Gobato (ORCID: https://orcid.org/0000-0003-2251-0426)
Institutions
- Universidade Federal de São Carlos (BR)
- National Institute for Materials Science (JP)
- Parc Científic de la Universitat de València (ES)
- University of Regensburg (DE)
- Delft University of Technology (NL)
Publication Details
- Journal
- ACS Nano
- Published
- 2024-10-28
- DOI
- https://doi.org/10.1021/acsnano.4c07336
- Citations
- 11
- Primary Topic
- 2D Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.29
Funders
- Graphene Flagship
- European Commission
- Deutscher Akademischer Austauschdienst
- Deutsche Forschungsgemeinschaft
- Ministry of Education, Culture, Sports, Science and Technology
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Generalitat Valenciana
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Japan Society for the Promotion of Science
- H2020 Future and Emerging Technologies
- H2020 Marie Skłodowska-Curie Actions