Amann, Julia and Voelkl, Tobias and Rockinger, Tobias and Kochan, Denis and Watanabe, Kenji and Taniguchi, Takashi and Fabian, Jaroslav and Weiss, Dieter and Eroms, Jonathan (2022) Counterintuitive gate dependence of weak antilocalization in bilayer graphene/WSe2 heterostructures. PHYSICAL REVIEW B, 105 (11): 115425. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
Strong gate control of proximity-induced spin-orbit coupling was recently predicted in bilayer graphene/transition metal dichalcogenide (BLG/TMDC) heterostructures, as charge carriers can easily be shifted between the two graphene layers, and only one of them is in close contact to the TMDC. The presence of spin-orbit coupling can be probed by weak antilocalization (WAL) in low-field magnetotransport measurements. When the spin-orbit splitting in such a heterostructure increases with the out-of-plane electric displacement field (D) over bar, one intuitively expects a concomitant increase of WAL visibility. Our experiments show that this is not the case. Instead, we observe a maximum of WAL visibility around (D) over bar = 0. This counterintuitive behavior originates in the intricate dependence of WAL in graphene on symmetric and antisymmetric spin lifetimes, caused by the valley-Zeeman and Rashba terms, respectively. Our observations are confirmed by calculating spin precession and spin lifetimes from an 8 x 8 model Hamiltonian of BLG/TMDC.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SPIN-ORBIT INTERACTION; LOCALIZATION; TRANSITION; STATE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Feb 2024 09:29 |
| Last Modified: | 01 Feb 2024 09:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57345 |
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