Exchange and spin-orbit proximity driven topological and transport phenomena in twisted graphene/CrI₃ heterostructures

2025/09/15 by Mohammad Jafari, Jafari, M., Martin Gmitra +3 · 1 citation
Materials Science · Physics and Astronomy · #Graphene research and applications #2D Materials and Applications #Quantum and electron transport phenomena

paper · pdf · doi:10.48550/arxiv.2509.11670

Abstract

We present results of comprehensive first-principles and kp-method studies of electronic, magnetic, and topological properties of graphene on a monolayer of CrI₃. First, we identify a twist angle between the graphene and CrI₃, that positions the graphene Dirac cones within the bandgap of CrI₃. Then, we derive the low-energy effective Hamiltonian describing electronic properties of graphene Dirac cones. Subsequently, we examine anomalous and valley Hall conductivity and discuss possible topological phase transition from a quantum anomalous Hall insulator to a trivial insulating state, concomitant a change in the magnetic ground state of CrI₃. These findings highlight the potential of strain engineering in two-dimensional van der Waals heterostructures for controlling topological and magnetic phases.

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• Proximity-Induced Spin-Orbit Torque in Graphene on a Trigonal CrSBr Monolayer

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