Maximally Localized Wannier Orbitals and the Anderson Impurity Model for Twisted Bilayer Graphene

ORAL

Abstract

We developed an effective Anderson impurity model to describe the low energy electronic properties of the twisted bilayer graphene. By using the method of selectively localizing Wannier orbitals, we construct a model that captures the key energetic and symmetry features of the original low energy bands and is possible for further calculation with non-perturbative methods. Using this model, we investigated the effect of interaction and the applied magnetic field near the half-filled region.

*This project is funded by Simons Foundation.

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Presenters

  • Xi Chen

    • Center for Computational Quantum Physics, Flatiron Institute

Authors

  • Xi Chen

    • Center for Computational Quantum Physics, Flatiron Institute

  • Emanuel C Gull

    • Physics, University of Michigan
    • University of Michigan

  • Andrew Millis

    • Center for Computational Quantum Physics, Flatiron Institute
    • Physics, Columbia University
    • Columbia University
    • Department of Physics, Columbia University
    • Center for Computational Quantum Physics, Flatiron Institute, NY, NY, 10010
    • National Institute of Materials Science
    • Center for Computational Quantum Physics, Flatiorn Institute, Physics Department, Columbia University