Magnetic Proximity Effect in a van der Waals Moiré Superlattice

Abstract

We investigate the magnetic proximity effect in van der Waals heterostructure formed by a monolayer semiconductor stacked on a 2D ferromagnet, where the lattice mismatch and twisting between the layers typically lead to the formation of moiré pattern. We find that the magnetic proximity effect arising from the spin dependent interlayer coupling depends sensitively on the interlayer atomic registry. Consequently, in the moiré pattern, the spatial variation of the atomic registry leads to a lateral modulation of magnetic proximity field. Such moiré modulated magnetic proximity effect manifests as a miniband spin splitting that strongly depends on the moiré periodicity which can be mechanically tuned by a relative twisting and/or strain between the layers. We also show, because of the moiré modulation on the interlayer distance, a perpendicular electric field can be used to control the miniband spin splitting. Our results suggest potential nanodevices where the moiré modulated magnetic proximity effect can lead to unique spin controllability.

arXiv comment18 pages, 12 figures

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• Interplay between spin proximity effect and charge-dependent exciton dynamics in MoSe${}_2$ / CrBr${}_3$ van der Waals heterostructures
• Giant Valley-Zeeman Splitting from Spin-Singlet and Spin-Triplet Interlayer Excitons in WSe2/MoSe2 Heterostructure
• Gate-tunable flat bands in van der Waals patterned dielectric superlattices
• Elucidating proximity magnetism through polarized neutron reflectometry and machine learning
• Band Gap Opening in Bilayer Graphene-CrCl${}_3$/CrBr${}_3$/CrI${}_3$ van der Waals Interfaces
• Controlling magnetism through Ising superconductivity in magnetic van der Waals heterostructures
• Reversible edge spin currents in antiferromagnetically proximitized dichalcogenides
• Factors affecting the topological Hall effect in strongly correlated layered magnets: spin of the magnetic atoms, polar and azimuthal angle subtended by the spin texture
• Spin-polarized transport properties in magnetic moiré superlattices
• A proposal for realizing Majorana fermions without external magnetic field in strongly correlated nanowires
• Magnetic Moiré Systems: a review
• Effect of spin-dependent tunneling and intervalley scattering in magnetic-semiconductor van der Waals heterostructures on exciton and trion polarization
• Proximity-induced Rashba spin-orbit interaction in BaMnO${}_{\text{3}}|$KTaO${}_{\text{3}}$ heterostructure for antiferromagnetic spintronics