Chiral Kondo lattice in doped MoTe₂/WSe₂ bilayer

In this talk we theoretically analyse multiband physics in transition metal dicalcogenide bilayers where the density of carriers, the interaction and the energy offset between the orbitals can all be experimentally varied over wide ranges. We show theoretically that this tunability enables unprecedented control over the ground state, opening the door to the synthetic realization and systematic study of site/orbitally selective Mott transitions, heavy-Fermi liquids, Quantum anomalous Hall insulator and perhaps superconductivity. We present a detailed analysis of a new ``heavy fermion” regime in which we show that the combination of strong spin-orbit coupling and the non-local structure gives rise to a chiral Kondo coupling leading to a new twist on heavy fermion physics [1], discuss instabilities of the low-density electron gas in the background of ordered magnetic moments and present a nodal Kondo insulator state. Our theory is motivated by experiments in AB-stacked transition-metal-dichalcogenides bilayer MoTe2/WSe2 [2].

[1] D. Guerci, J. Wang, J. Zang, J. Cano, J. Pixley and A. Millis, arXiv:2207.06476 (2022)

[2] Kin Fai Mak et al., Nature 600, 641 (2021)