Berry curvature, spin Hall effect and nonlinear optical response in moiré transition metal dichalcogenide heterobilayers
arXiv:2210.00759 · doi:10.1103/PhysRevB.107.075424
Abstract
Recently, the topological flat bands and spin Hall effect have been experimentally observed in the AB-stacked MoTe/WSe heterostructures. In this work, we systematically study the Berry curvature effects in moiré transition metal dichalcogenide (TMD) heterobilayers. We point out that the moiré potential of the remote conduction bands would induce a sizable periodic pseudo-magnetic field (PMF) on the valence band. This periodic PMF creates net Berry curvature flux in each valley of the moiré Brillouin zone. The combination of the effect of the Berry curvature and the spin-valley locking can induce the spin Hall effect being observed in the experiment. Interestingly, the valley-contrasting Berry curvature distribution generated by the PMF can be probed through shift currents, which are DC currents induced by linearly polarized lights through nonlinear responses. Our work shed lights on the novel quantum phenomena induced by Berry curvatures in moiré TMD heterobilayers.
arXiv comment10 pages, 7 figures
References in corpus (38)
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Tuning superconductivity in twisted bilayer graphene
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Intrinsic quantized anomalous Hall effect in a moiré heterostructure
- Signatures of moiré-trapped valley excitons in MoSe/WSe heterobilayers
- Magic continuum in twisted bilayer WSe2
- Topological insulators in twisted transition metal dichalcogenide homobilayers
- Hubbard model physics in transition metal dichalcogenide moiré bands
- Topological nature of nonlinear optical effects in solids
- Quantum anomalous Hall effect from intertwined moiré bands
- Origin of Mott insulating behavior and superconductivity in twisted bilayer graphene
- Maximally-localized Wannier orbitals and the extended Hubbard model for the twisted bilayer graphene
- Design principles for shift current photovoltaics
- Topological mosaic in Moiré superlattices of van der Waals heterobilayers
- Twisted Bilayer Graphene Aligned with Hexagonal Boron Nitride: Anomalous Hall Effect and a Lattice Model
- -Valley Transition-Metal-Dichalcogenide Moirè Bands
- Moiré quantum chemistry: charge transfer in transition metal dichalcogenide superlattices
- Berry curvature dipole senses topological transition in a moiré superlattice
- Tunable bilayer Hubbard model physics in twisted WSe2
- Giant Orbital Magneto-electric effect and Current-driven Magnetization Switching in Twisted Bilayer Graphene
- Correlated interlayer exciton insulator in double layers of monolayer WSe2 and moiré WS2/WSe2
- Electronic structures, charge transfer and charge orders in twisted transition metal dichalcogenide bilayers
- Valley-Polarized Quantum Anomalous Hall State in Moiré MoTe/WSe Heterobilayers
- Spin-orbit coupling induced valley Hall effects in transition-metal dichalcogenides
- Tunable large Berry dipole in strained twisted bilayer graphene
- Giant nonlinear Hall effect in strained twisted bilayer graphene
- Topological Phases in AB-Stacked MoTe/WSe: Topological Insulators, Chern Insulators, and Topological Charge Density Waves
- Quantum anomalous Hall effect from inverted charge transfer gap
- Optical and plasmonic properties of twisted bilayer graphene: Impact of interlayer tunneling asymmetry and ground-state charge inhomogeneity
- Nonlinear anomalous Hall effects probe topological phase-transitions in twisted double bilayer graphene
- Nonlinear Hall Effects in Strained Twisted Bilayer WSe
- Massive Dirac fermions in moiré superlattices: a route towards topological flat minibands
- Excitonic Chern insulator and kinetic ferromagnetism in MoTe/WSe moiré bilayer
- Layer pseudospin dynamics and genuine non-Abelian Berry phase in inhomogeneously strained moiré pattern
- Quantum anomalous Hall effect and electric-field-induced topological phase transition in AB-stacked MoTe/WSe moiré heterobilayers
- Spin-textured Chern bands in AB-stacked transition metal dichalcogenide bilayers