SU(4) Kondo Lattice in Semiconductor Moiré Materials
arXiv:2509.18247 · doi:10.1103/jnjq-clrk
Abstract
Motivated by recent advances in transition metal dichalcogenide (TMD) moiré materials, we propose TMD moiré multilayers as a platform for realizing an approximately SU(4)-symmetric triangular Kondo lattice, generalizing the concept of the double quantum dot model. Our model extends the conventional Kondo lattice by incorporating a three-site exchange of SU(4) local moments, which drives spontaneous time-reversal and lattice symmetry breaking. Using a parton mean-field approach, we map out the phase diagram as a function of three-site exchange and hole doping. In the Kondo-unscreened regime, we identify Mott insulating phases, including bond-ordered states and a chiral spin liquid. With increasing doping, Kondo hybridization gives rise to a heavy Fermi liquid that exhibits distinct patterns of lattice symmetry breaking, with or without topological responses. We conclude with directions for future study.
5 pages, 4 figures. Supplementary material: 4 pages, 1 figure
References in corpus (14)
- Weak magnetism and non-Fermi liquids near heavy-fermion critical points
- Fractionalized Fermi liquids
- Mott Insulators of Ultracold Fermionic Alkaline Earth Atoms: Underconstrained Magnetism and Chiral Spin Liquid
- Gate-tunable heavy fermions in a moiré Kondo lattice
- Resonating plaquette phases in large spin cold atom systems
- Kondo lattice model in magic-angle twisted bilayer graphene
- Paired chiral spin liquid with a Fermi surface in S=1 model on the triangular lattice
- Simplex solid states of SU(N) quantum antiferromagnets
- Chiral Pseudo Spin Liquids in Moire Heterostructures
- Kondo effect and its destruction in hetero-bilayer transition metal dichalcogenides
- Topological Kondo semimetal and insulator in AB-stacked heterobilayer transition metal dichalcogenides
- Correlated Topological Mixed-Valence Insulators in Moiré Hetero-Bilayers
- Spin-valley magnetism on the triangular moiré lattice with SU(4) breaking interactions
- Topological Kondo semimetals emulated in hetero-bilayer transition metal dichalcogenides