Gerber, Jonas D. and Ersoy, Efe and Masseroni, Michele and Niese, Markus and Laumer, Michael and Denisov, Artem O. and Duprez, Hadrien and Huang, Wister Wei and Adam, Christoph and Ostertag, Lara and Tong, Chuyao and Taniguchi, Takashi and Watanabe, Kenji and Fal'ko, Vladimir I. and Ihn, Thomas and Ensslin, Klaus and Knothe, Angelika (2025) Tunable Spin-Orbit Splitting in Bilayer Graphene/WSe2 Quantum Devices. NANO LETTERS, 25 (33). pp. 12480-12486. ISSN 1530-6984, 1530-6992
Full text not available from this repository. (Request a copy)Abstract
Bilayer graphene (BLG)-based quantum devices represent a promising platform for emerging technologies, such as quantum computing and spintronics. However, their intrinsically weak spin-orbit coupling (SOC) complicates spin and valley manipulation. Integrating BLG with transition metal dichalcogenides (TMDs) enhances the SOC via proximity effects. While this enhancement has been demonstrated in 2D-layered structures, 1D and 0D nanostructures in BLG/TMD remain unrealized, with open questions regarding SOC strength and tunability. Here, we investigate quantum point contacts and quantum dots in two BLG/WSe2 heterostructures with different stacking orders. Across multiple devices, we reproducibly demonstrate spin-orbit splitting up to 1.5 meV-more than 1 order of magnitude higher than in pristine BLG. Furthermore, we show that the induced SOC can be tuned in situ from its maximum value to near-complete suppression via the perpendicular electric field. This enhancement and in situ tunability establish the SOC as a control mechanism for dynamic spin and valley manipulation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | graphene; transition metal dichalcogenides; proximity effect; spin-orbit coupling; quantumdot; quantum point contact |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Jun 2026 06:04 |
| Last Modified: | 24 Jun 2026 06:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/67252 |
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