Eshelby-twisted three-dimensional moiré superlattices

Author(s): Song, Z; Sun, X; Wang, LW | Abstract: Twisted bilayers of van der Waals materials have recently attracted great attention due to their tunable, strongly correlated phenomena. Here, we investigate the chirality-specific physics in three-dimensional moire superlattices induced by Eshelby twist. Our direct density functional theory calculations reveal helical rotation leads optical circular dichroism and nonlinear Hall effect, even though there is no magnetization or magnetic field. Both these phenomena can be reversed changing structural chirality. This provides a path constructing materials.