DFT calculations show acoustic phonon forces create standing shear strain waves whose gradients couple to electric dipoles to form the polar Moiré pattern in twisted BaTiO3 bilayers.
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On the origin of the unusual strain morphologies and polar Moir\'e patterns in twisted ferroelectrics
DFT calculations show acoustic phonon forces create standing shear strain waves whose gradients couple to electric dipoles to form the polar Moiré pattern in twisted BaTiO3 bilayers.