The effects of the long range electrostatic interaction in twisted bilayer graphene are described using the Hartree-Fock approximation. The results show a significant dependence of the band widths and shapes on electron filling, and the existence of broken symmetry phases at many densities, either valley/spin polarized, with broken sublattice symmetry, or both.
@article{arxiv.2109.06038,
title = {Electrostatic interactions in twisted bilayer graphene},
author = {Tommaso Cea and Pierre A. Pantaleón and Niels R. Walet and Francisco Guinea},
journal= {arXiv preprint arXiv:2109.06038},
year = {2022}
}
Comments
Invited contribution to a special issue of Nano Materials Science. 12 pages, 8 figures. arXiv admin note: substantial text overlap with arXiv:2004.01577