Twist angle controlled collinear Edelstein effect in van der Waals heterostructures

TY - JOUR

T1 - Twist angle controlled collinear Edelstein effect in van der Waals heterostructures

AU - Veneri, Alessandro

AU - Perkins, David T.S.

AU - Péterfalvi, Csaba G.

AU - Ferreira, Aires

N1 - Funding Information: A.V., D.T.S.P., and A.F. acknowledge support from the Royal Society through Grants No. URF/R/191021, No. RF/ERE/210281, and No. RGF/EA/180276. © 2022 authors.

PY - 2022/8/18

Y1 - 2022/8/18

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85138146890&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.106.L081406

DO - 10.1103/PhysRevB.106.L081406

M3 - Letter

AN - SCOPUS:85138146890

SN - 2469-9950

VL - 106

JO - Physical Review B

JF - Physical Review B

IS - 8

M1 - L081406

ER -