Gate-tunable heavy fermion quantum criticality in a moiré Kondo lattice

Abstract

We propose a realization of Kondo-lattice physics in moiré superlattices at the interface between a WX${}_2$ homobilayer and MoX${}_2$ monolayer (where X=S,Se). Under appropriate gating conditions, the interface-WX${}_2$-layer forms a triangular lattice of local moments that couple to itinerant electrons in the other WX${}_2$-layer via a gate-tunable Kondo exchange interaction. Using a parton mean-field approach we identify a range of twist-angles which support a gate-tuned quantum phase transition between a heavy-fermion liquid with large anomalous Hall conductance and a fractionalized chiral spin-liquid coexisting with a light Fermi liquid, and describe experimental signatures to distinguish among competing theoretical scenarios.

arXiv comment4+7 pages, 2+5 figures

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• Programming Correlated Magnetic States via Gate Controlled Moiré Geometry
• Gate-tunable heavy fermions in a moiré Kondo lattice
• Kondo lattice model in magic-angle twisted bilayer graphene
• Chiral Kondo Lattice in Doped MoTe${}_2$/WSe${}_2$ Bilayers
• Topological superconductivity in doped magnetic moiré semiconductors
• Exciton density waves in Coulomb-coupled dual moiré lattices
• Heterogeneous Ta-dichalcogenide bilayer: heavy fermions or doped Mott physics?
• A solvable 3D Kondo lattice exhibiting odd-frequency pairing and order fractionalization
• Coupled topological flat and wide bands: Quasiparticle formation and destruction
• Superconductivity in twisted WSe${}_2$ from topology-induced quantum fluctuations
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• Pseudogap metal and magnetization plateau from doping moiré Mott insulator
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• Uncovering the spin ordering in magic-angle graphene via edge state equilibration
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• Gate-defined Kondo lattices with valley-helical quantum dot arrays
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• SU(4) Kondo Lattice in Semiconductor Moiré Materials
• Stripe antiferromagnetism and chiral superconductivity in tWSe${}_2$
• Dilute Paramagnetism and Non-Trivial Topology in Quasicrystal Approximant Fe${}_4$Al${}_{13}$
• Emergent Chiral Metal near a Kondo Breakdown Quantum Phase Transition