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Proximity spin-orbit and exchange coupling in ABA and ABC trilayer graphene van der Waals heterostructures
- Publication Year :
- 2022
- Publisher :
- American Physical Society, 2022.
-
Abstract
- 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 Cr$_2$Ge$_2$Te$_6$. 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 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 provide, along with the first-principles results of the electronic band structures, density of states, spin splittings, and electric-field tunabilities of the bands, qualitative understanding of the observed behavior and realistic model parameters as a resource for model simulations of transport and correlation physics in trilayer graphene.<br />Comment: 27 pages, 22 figures, 5 tables
Details
- Language :
- German
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....ca8b4b29e6e82ba11eeffaee720fef1d