Zollner, Klaus and Gmitra, Martin and Fabian, Jaroslav (2022) Proximity spin-orbit and exchange coupling in ABA and ABC trilayer graphene van der Waals heterostructures. PHYSICAL REVIEW B, 105 (11): 115126. ISSN 2469-9950, 2469-9969
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We investigate the proximity spin-orbit and exchange couplings in ABA and ABC trilayer graphene encapsulated within monolayers of semiconducting transition-metal dichalcogenides and the ferromagnetic semiconductor Cr2Ge2Te6. Employing first-principles calculations, we obtain the electronic structures of the multilayer stacks and extract the relevant proximity-induced orbital and spin interaction parameters by fitting the low-energy bands to model Hamiltonians. We also demonstrate the tunability of the proximity effects by a transverse electric field. Using the model Hamiltonians, we also study mixed spin-orbit/exchange coupling encapsulation, which allows us to tailor the spin interactions very efficiently by the applied field. We also summarize the spin-orbit physics of bare ABA, ABC, and ABB trilayers, and we provide-along with the first-principles results of the electronic band structures, density of states, spin splittings, and electric-field tunabilities of the bands-a qualitative understanding of the observed behavior and realistic model parameters as a resource for model simulations of transport and correlation physics in trilayer graphene.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CORRELATED STATES; SUPERCONDUCTIVITY; FERROMAGNETISM; INSULATOR; CRYSTAL; BANDS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Jaroslav Fabian |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Dec 2023 16:01 |
| Last Modified: | 12 Dec 2023 16:01 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57036 |
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