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arXiv · 2305.12848

Twirling and spontaneous symmetry breaking of domain wall networks in lattice-reconstructed heterostructures of 2D materials

M. A. Kaliteevsky·V. V. Enaldiev·V. I. Fal'ko
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Abstract

Lattice relaxation in twistronic bilayers with close lattice parameters and almost perfect crystallographic alignment of the layers results in the transformation of moir\'e pattern into a sequence of preferential stacking domains and domain wall networks. Here, we show that reconstructed moir\'e superlattices of the perfectly aligned heterobilayers of same-chalcogen transition metal dichalcogenides have broken-symmetry structures featuring twisted nodes ('twirls') of domain wall networks. Analysing twist-angle-dependences of strain characteristics for the broken-symmetry structures we show that the formation of twirl reduces amount of hydrostatic strain around the nodes, potentially, reducing their infuence on the band edge energies of electrons and holes.

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M. A. Kaliteevsky, V. V. Enaldiev, V. I. Fal'ko. 2023-05-22. Twirling and spontaneous symmetry breaking of domain wall networks in lattice-reconstructed heterostructures of 2D materials. https://doi.org/10.1021/acs.nanolett.3c01896

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