Van der Waals spin valves

Abstract

We propose spin valves where a 2D non-magnetic conductor is intercalated between two ferromagnetic insulating layers. In this setup, the relative orientation of the magnetizations of the insulating layers can have a strong impact on the in-plane conductivity of the 2D conductor. We first show this for a graphene bilayer, described with a tight-binding model, placed between two ferromagnetic insulators. In the anti-parallel configuration, a band gap opens at the Dirac point, whereas in the parallel configuration, the graphene bilayer remains conducting. We then compute the electronic structure of graphene bilayer placed between two monolayers of the ferromagnetic insulator CrI${}_3$, using density functional theory. Consistent with the model, we find that a gap opens at the Dirac point only in the antiparallel configuration.

arXiv comment5 pages, 4 figures

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• Theory and simulations of critical temperatures in CrI3 and other 2D materials: Easy-axis magnetic order and easy-plane Kosterlitz-Thouless transitions
• Twist- and gate-tunable proximity spin-orbit coupling, spin relaxation anisotropy, and charge-to-spin conversion in heterostructures of graphene and transition-metal dichalcogenides
• Proximity effects in Graphene and Ferromagnetic CrBr3 van der Waals Heterostructure
• Magnetic polaron and antiferro-ferromagnetic transition in doped bilayer CrI${}_3$
• Engineering Proximity Exchange by Twisting: Reversal of Ferromagnetic and Emergence of Antiferromagnetic Dirac Bands in Graphene/Cr${}_2$Ge${}_2$Te${}_6$
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• Proximity effects in graphene on monolayers of transition-metal phosphorus trichalcogenides MPX${}_3$
• Spin-Valley Polarized Quantum Anomalous Hall Effect and a Valley-Controlled Half Metal in Bilayer Graphene
• Bilayer graphene encapsulated within monolayers of WS${}_2$ or Cr${}_2$Ge${}_2$Te${}_6$: Tunable proximity spin-orbit or exchange coupling
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• Proximity spin-orbit and exchange coupling in ABA and ABC trilayer graphene van der Waals heterostructures
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• Anisotropic properties of monolayer 2D materials: an overview from the C2DB database
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• Band Gap Opening in Bilayer Graphene-CrCl${}_3$/CrBr${}_3$/CrI${}_3$ van der Waals Interfaces
• Exchange splitting and exchange-induced non-reciprocal photonic behavior of graphene in CrI3-graphene vdW heterostructures
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• Roadmap on Quantum Magnetic Materials
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• Spin-orbit correlations and exchange-bias control in twisted Janus dichalcogenide multilayers
• Designing spin-textured flat bands in twisted graphene multilayers via helimagnet encapsulation
• Ferroelectric valley valves with graphene/MoTe${}_2$ van der Waals heterostructures
• Superexchange and spin-orbit coupling in monolayer and bilayer chromium trihalides
• Proximity-induced diversified magnetic states and electrically-controllable spin polarization in bilayer graphene: Towards layered spintronics
• Magnetic States of Graphene Proximitized Kitaev Materials
• Electrical tuning of the magnetic properties of 2D magnets: the case of ${\mathrm{Cr}}_2{\mathrm{Ge}}_2{\mathrm{Te}}_6$
• Fingerprints of Universal Spin-Stiffness Jump in Two-Dimensional Ferromagnets
• Electrically tunable Gilbert damping in van der Waals heterostructures of two-dimensional ferromagnetic metals and ferroelectrics
• Advancing excited-state properties of two-dimensional materials using a dielectric-dependent hybrid functional
• Tuning of Bilayer Graphene Heterostructure by Horizontally Incident Circular Polarized Light
• Designing layered 2D skyrmion lattices in moiré magnetic hetero-structures
• Tunable moire spinons in magnetically encapsulated twisted van der Waals quantum spin-liquids
• Computational studies on magnetism and ferroelectricity
• Optical injection of a spin current into a zigzag nanoribbon of monolayer MoS2 with antiferromagnetic Kekule distortion
• Emergent quantum matter in graphene nanoribbons
• Spin-charge coupled transport in van der Waals systems with random tunneling
• Interlayer superexchange in bilayer chromium trihalides
• Noncollinearity-modulated electronic properties of the monolayer CrI${}_3$
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• Local Optical Conductivity of Bilayer Graphene with Kink Potential
• Chiral Majorana Fermions in two dimensional square lattice antiferromagnet with proximity-induced superconductivity
• Environmental Screening and Ligand-Field Effects to Magnetism in CrI${}_3$ Monolayer
• Valley-Polarized Quantum Anomalous Hall Phase in Bilayer Graphene with Layer-Dependent Proximity Effects