Origin of the vortex displacement field in twisted bilayer graphene

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.

arXiv comment6 pages, 5 figures

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Cited by in corpus (4)

• Heterostrain rules the flat-bands in magic-angle twisted graphene layers
• A topologically-derived dislocation theory for twist and stretch moiré superlattices in bilayer graphene
• Selection rules of twistronic angles in 2D material flakes via dislocation theory
• Plasmonic Quantum Dots in Twisted Bilayer Graphene