Complex Strain Scapes in Reconstructed Transition-Metal Dichalcogenide Moire Superlattices.

ABSTRACT: We investigate the intrinsic strain associated with the coupling of twisted MoS₂/MoSe₂ heterobilayers by combining experiments and molecular dynamics simulations. Our study reveals that small twist angles (between 0 and 2°) give rise to considerable atomic reconstructions, large moiré periodicities, and high levels of local strain (with an average value of ∼1%). Moreover, the formation of moiré superlattices is assisted by specific reconstructions of stacking domains. This process leads to a complex strain distribution characterized by a combined deformation state of uniaxial, biaxial, and shear components. Lattice reconstruction is hindered with larger twist angles (>10°) that produce moiré patterns of small periodicity and negligible strains. Polarization-dependent

SUBMITTER: Rodriguez A 

PROVIDER: S-EPMC10134736 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature