  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 3D moir\'e superlattices induced
by Eshelby twist. Our direct DFT calculations reveal helical rotation leads to
optical circular dichroism, and chirality-specific nonlinear Hall effect, even
though there is no magnetization or magnetic field. Both these phenomena can be
reversed by changing the structural chirality. This provides a way to
constructing chirality-specific materials.
