Phase diagram of effective model for twisted bilayer graphene at particle-hole symmetric point

ORAL

Abstract

We study an effective extended Hubbard model on the honeycomb lattice with two orbitals per site at the particle-hole symmetry filling. The tight-binding part of the model is believed to describe the low-energy electronic properties of the twisted bilayer graphene. Using large-scale projection quantum Monte Carlo method, we map out the ground state phase diagram of the model, the novel properties of electrons in the presence of non-local (plaquette) interaction, are revealed with high accuracy.

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Presenters

  • Yuan Da Liao

    • Institute of physics, Chinese Academy of Sciences

Authors

  • Yuan Da Liao

    • Institute of physics, Chinese Academy of Sciences

  • Xiao Yan Xu

    • Department of Physics, Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technolog
    • Department of Physics,, Hong Kong University of Science and Technology
    • Hong Kong University of Science and Technology

  • Zi Yang Meng

    • Institute of Physics, Chinese Academy of Sciences
    • Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Science
    • Institute of physics, Chinese Academy of Sciences
    • Chinese Academy of Science
    • Chinese Academy of Sciences
    • Chinese Academy of Sciences (CAS), China
    • Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    • Institute of Physics, CAS
    • Institute of Physics, Chinese Academy of Science