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