Fig. 2: The effect of flake size on twist angles and moiré superlattice constant in MoS2/MoSe2 (periodic layer/flakes) systems.
From: Relaxation effects in transition metal dichalcogenide bilayer heterostructures
The numerical determined (a) twisted angle and (b, c) moiré superlattice constant after relaxation versus the side-length of MoSe2 flakes. The horizontal dashed lines in (a) and the legend indicate the initial stacking angle before relaxation. A vertical dashed line across all panels marks convergence size (80 nm) beyond which the properties are considered size-independent for all stacking angles. In (b) and (c), the shaded regions highlight the range of moiré superlattice constants deduced from commensurate systems. This range reflects the lattice constants derived from commensurate systems where the twist angles are in agreement with those post-relaxation twist angles in flakes systems, when the flake size exceeds its convergence point. The overlap of the shaded regions and data points indicates the similarity between flake systems and commensurate systems, further illustrated in Supplementary Fig. 7.
