Origin of the vortex displacement field in twisted bilayer graphene
Mesoscale and Nanoscale Physics
2020-09-02 v1 Materials Science
Abstract
Model description of patterns of atomic displacements in twisted bilayer systems has been proposed. The model is based on the consideration of several dislocation ensembles, employing a language that is widely used for grain boundaries and film/substrate systems. We show that three ensembles of parallel screw dislocations are sufficient both to describe the rotation of the layers as a whole, and for the vortex-like displacements resulting from elastic relaxation. The results give a clear explanation of the observed features of the structural state such as vortices, accompanied by alternating stacking.
Keywords
Cite
@article{arxiv.2006.11551,
title = {Origin of the vortex displacement field in twisted bilayer graphene},
author = {Yu. N. Gornostyrev and M. I. Katsnelson},
journal= {arXiv preprint arXiv:2006.11551},
year = {2020}
}
Comments
6 pages, 5 figures