期刊
PHYSICAL REVIEW LETTERS
卷 125, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.196402
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [SFB 1277, 314695032]
- European Unions Horizon 2020 research and innovation program [785219]
- DFG [SPP 1666]
- VEGA [1/0105/20]
- Internal Research Grant System [VVGS-2019-1227]
The concept of swapping the two most important spin interactions-exchange and spin-orbit coupling-is proposed based on two-dimensional multilayer van der Waals heterostructures. Specifically, we show by performing realistic ab initio simulations, that a single device consisting of a bilayer graphene sandwiched by a 2D ferromagnet Cr2Ge2Te6 (CGT) and a monolayer WS2, is able not only to generate, but also to swap the two interactions. The highly efficient swapping is enabled by the interplay of gate-dependent layer polarization in bilayer graphene and short-range spin-orbit and exchange proximity effects affecting only the layers in contact with the sandwiching materials. We call these structures ex-so-tic, for supplying either exchange (ex) or spin-orbit (so) coupling in a single device, by gating. Such bifunctional devices demonstrate the potential of van der Waals spintronics engineering using 2D crystal multilayers.
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