Beer, Andreas and Zollner, Klaus and Serati de Brito, Caique and Faria Junior, Paulo E. and Parzefall, Philipp and Ghiasi, Talieh S. and Ingla-Aynes, Josep and Manas-Valero, Samuel and Boix-Constant, Carla and Watanabe, Kenji and Taniguchi, Takashi and Fabian, Jaroslav and van der Zant, Herre S. J. and Galvao Gobato, Yara and Schueller, Christian (2024) Proximity-Induced Exchange Interaction and Prolonged Valley Lifetime in MoSe2/CrSBr Van-Der-Waals Heterostructure with Orthogonal Spin Textures. ACS NANO, 18 (45). pp. 31044-31054. ISSN 1936-0851, 1936-086X
Full text not available from this repository.Abstract
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 MoSe2 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 MoSe2 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 MoSe2/SiO2, driven by a Mott transition in the type-III band-aligned heterostructure.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EXCITONS; COHERENT; DYNAMICS; CRYSTALS; transition metal dichalcogenides; two-dimensional magnets; van der Waals heterostructures; optical spectroscopy; time-resolved Kerr rotation |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Jul 2025 12:04 |
| Last Modified: | 29 Jul 2025 12:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64287 |
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