Phys.org October 30, 2023
The formation of one-dimensional moiré patterns is a consequence of an interplay between twist and strain which gives rise to a collapse of the reciprocal space unit cell. An international team of researchers (Spain, Poland) found a simple relation between the two quantities and the material specific Poisson ratio. The induced one-dimensional behavior was characterized by two, usually incommensurate, periodicities. According to the researchers their results offer explanations for the complex patterns of one-dimensional channels observed in low angle twisted bilayer graphene systems and twisted bilayer dichalcogenides. Their findings can be applied to any hexagonal twisted moiré pattern and can be easily extended to other geometries… read more. TECHNICAL ARTICLE
Strain-induced geometrical effects in a moiré superlattice with twist angle θ=3° … Credit: Phys. Rev. Lett. 131, 166402,18 October 2023