In situ controllable magnetic phases in doped twisted bilayer transition-metal dichalcogenides

Abstract

We study the electronic structure of hole-doped transition metal dichalcogenides for small twist-angels, where the onsite repulsion is extremely strong. Using unbiased diagrammatic Monte Carlo simulations, we find evidence for magnetic correlations which are driven by delocalization and can be controlled in situ via the dielectric environment. For weak spin-orbit coupling, we find that the moderately doped system becomes anti-ferromagnetic, whilst the regime of strong spin-orbit coupling features ferromagnetic correlations. We show that this behavior is accurately predicted by an analytical theory based on moment expansion of the Hamiltonian, and analysis of corresponding particle trajectories.

5 pages, 4 figs

References in corpus (4)

• Quantum Criticality in Twisted Transition Metal Dichalcogenides
• Band topology, Hubbard model, Heisenberg model, and Dzyaloshinskii-Moriya interaction in twisted bilayer WSe${}_2$
• Hartree-Fock study of the moiré Hubbard model for twisted bilayer transition metal dichalcogenides
• Dynamical Mean Field Theory of Moiré Bilayer Transition Metal Dichalcogenides: Phase Diagram, Resistivity, and Quantum Criticality

Cited by in corpus (4)

• Kinetic Magnetism in Triangular Moiré Materials
• Exciton and light induced ferromagnetism from doping a moiré Mott insulator
• Finite-Temperature Kinetic Ferromagnetism in the Square Lattice Hubbard Model
• Physical and unphysical regimes of self-consistent many-body perturbation theory