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  • Open Access

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

Johan Carlström

  • Department of Physics, Stockholm University, 106 91 Stockholm, Sweden

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Phys. Rev. Research 4, 043126 – Published 22 November, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.043126

Abstract

We study the electronic structure of hole-doped transition metal dichalcogenides for small twist angles, where the on-site 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 antiferromagnetic, while 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 an analysis of corresponding particle trajectories.

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Phys. Rev. Research 4, 043126– Published 22 November, 2022
  • Received 27 April 2022
  • Revised 10 August 2022
  • Accepted 26 August 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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