Interacting models for twisted bilayer graphene: A quantum chemistry approach

• DOI: 10.1103/physrevb.107.235123
• Publication Date: 2023-06-13T15:57:27Z
• Authors: Fabian M. Faulstich; Kevin D. Stubbs; Qinyi Zhu; Tomohiro Soejima; Rohit Dilip; Huanchen Zhai; Raehyun Kim; Michael P. Zaletel; Garnet Kin-Lic Chan; Lin Lin
• Keywords: Bilayer graphene; Quantum Chemistry

Twisted bilayer graphene (TBG) has garnered significant interest in condensed matter physics over the past few years. Here, authors present numerical investigations of TBG implementing state-of-the-art quantum chemistry methods. Using a gauge-invariant order parameter, they show ${C}_{2z}$\ensuremath{\mathcal{T}} phase transition at charge neutrality which persists noninteger fillings near neutrality. The work is first systematic study for