Publikation: Twist angle controlled collinear Edelstein effect in van der Waals heterostructures
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The generation of spatially homogeneous spin polarization by application of electric current is a fundamental manifestation of symmetry-breaking spin-orbit coupling (SOC) in solid-state systems, which underpins a wide range of spintronic applications. Here, we show theoretically that twisted van der Waals heterostructures with proximity-induced SOC are candidates par excellence to realize exotic spin-charge transport phenomena due to their highly tunable momentum-space spin textures. Specifically, we predict that graphene/group-VI dichalcogenide bilayers support room temperature spin-current responses that can be manipulated via twist-angle control. For critical twist angles, the nonequilibrium spin density is pinned parallel to the applied current. This effect is robust against twist-angle disorder, with graphene/WSe2 possessing a critical angle (purely collinear response) of θc≃14∘. A simple electrical detection scheme to isolate the collinear Edelstein effect is proposed.
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VENERI, Alessandro, David T. S. PERKINS, Csaba G. PÉTERFALVI, Aires FERREIRA, 2022. Twist angle controlled collinear Edelstein effect in van der Waals heterostructures. In: Physical Review B. American Physical Society (APS). 2022, 106(8), L081406. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.106.L081406BibTex
@article{Veneri2022Twist-59026, year={2022}, doi={10.1103/PhysRevB.106.L081406}, title={Twist angle controlled collinear Edelstein effect in van der Waals heterostructures}, number={8}, volume={106}, issn={2469-9950}, journal={Physical Review B}, author={Veneri, Alessandro and Perkins, David T. S. and Péterfalvi, Csaba G. and Ferreira, Aires}, note={Article Number: L081406} }
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