Fig. 2: Shows out-of-plane atomic displacements in a pristine MoS2 monolayer (left column) on top of an MoS2 monolayer with a nanopore (right column).
The color bar indicates the range of vertical displacements of atoms. Panels a and b show the patterns created by the SAW in a system with 0° twist between the monolayers. The red-yellow lines show phonon focusing on the layers. Panels c and d show that the corresponding patterns start to break at a twist angle of θ = 0.5°. Phonon focusing starts to diminish as the top layer is further rotated relative to the bottom layer; see panels e and f corresponding to θ = 5°, panels g and h at θ = 15°, and i and j at θ = 30°. The rotation does not affect the region in the top layer right above the pore, where the pore is sucked in and the shape of the nanopore can be seen in the top layer. Pixelated images of normal displacements are shown in Fig. S3. They are smaller in magnitude than the atomic displacements in this figure.
