We demonstrate that a single layer of graphene subject to a superlattice potential nearly commensurate to a 3×3 supercell exactly maps to the chiral model of twisted bilayer graphene, albeit with half as many degrees of freedom. We comprehensively review the properties of this ``half-chiral model,'' including the interacting phases stabilized at integer fillings and the effects of substrate-induced symmetry breaking. We list candidate substrates that could produce a superlattice potential on graphene with the correct periodicity to access the flat band limit. Experimental measurements on a half-chiral moire heterostructure, in which valley-skyrmions cannot form, could yield insights on the physics they mediate in twisted bilayer graphene.
@article{arxiv.2305.14423,
title = {Chiral model of twisted bilayer graphene realized in a monolayer},
author = {Valentin Crépel and Aaron Dunbrack and Daniele Guerci and John Bonini and Jennifer Cano},
journal= {arXiv preprint arXiv:2305.14423},
year = {2024}
}