Interaction-Driven Filling-Induced Metal-Insulator Transitions in 2D Moiré Lattices

Abstract

Using a realistic band structure for twisted WSe${}_2$ materials, we develop a theory for the interaction-driven correlated insulators to conducting metals transitions through the tuning of the filling factor around commensurate fractional fillings of the moiré unit cell in the 2D honeycomb lattice, focusing on the dominant half-filled Mott insulating state, which exists for both long- and short-range interactions. We find metallic states slightly away from half-filling, as have recently been observed experimentally. We discuss the stabilities and the magnetic properties of the resulting insulating and metallic phases, and comment on their experimental signatures. We also discuss the nature of the correlated insulator states at the rational fractional fillings.

arXiv comment5 pages, 4 figures

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Cited by in corpus (32)

• Continuous Mott transition in semiconductor moiré superlattices
• Quantum Criticality in Twisted Transition Metal Dichalcogenides
• Giant nonlinear Hall effect in twisted WSe${}_2$
• Topological Phases in AB-Stacked MoTe${}_2$/WSe${}_2$: ${\mathbb{Z}}_2$ Topological Insulators, Chern Insulators, and Topological Charge Density Waves
• Spin-Orbit Coupling in Transition Metal Dichalcogenide Heterobilayer Flat Bands
• Multifaceted moiré superlattice physics in twisted WSe${}_2$ bilayers
• Dielectric catastrophe at the Mott and Wigner transitions in a moiré superlattice
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• Magnetism and Quantum Melting in Moiré-Material Wigner Crystals
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• Disorder induced 2D metal-insulator transition in moiré transition metal dichalcogenide multilayers
• Theory of a continuous bandwidth-tuned Wigner-Mott transition
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• Competing Generalized Wigner Crystal States in Moiré Heterostructures
• Phonon-limited resistivity of multilayer graphene systems
• Acoustic phonon contribution to the resistivity of twisted bilayer graphene
• Moiré Band Engineering in Twisted Trilayer WSe2
• Exciton and light induced ferromagnetism from doping a moiré Mott insulator
• Kanamori-Moiré-Hubbard model for transition metal dichalcogenide homobilayers
• Spin incoherent liquid and interaction-driven criticality in 1D Hubbard model
• Continuous Wigner-Mott transition at $\nu =1/5$
• Non-Hermitian Delocalization Induced by Residue Imaginary Velocity
• The kinetic theory of ultra-subsonic fermion systems and applications to flat band magic angle twisted bilayer graphene
• Origin and stability of generalized Wigner crystallinity in triangular moiré systems
• Topological phase transition from periodic edge states in moiré superlattices
• Site-polarized Mott phases competing with a correlated metal in twisted WSe${}_2$
• Temperature dependent resistivity in the doped two dimensional metallic phase of mTMD bilayers
• Non-local interactions and supersolidity of moiré excitons