Sliding ferroelectricity in a bulk misfit layer compound (PbS)${}_{1.18}$VS${}_2$

Abstract

Twisted heterostructures of two-dimensional crystals can create a moiré landscape, which can change the properties of it's parent crystals. However, the reproducibility of manual stacking is far from perfect. Here, the alternated stacking of post-transition metal monochalcogenides and transition metal dichalcogenides in misfit layer compound crystals is used as a moiré generator. Using X-ray diffraction, the presence of twins with a well-defined small twist angle between them is shown. Due to the twist, the surface electrical potential from the induced ferroelectricity is observed using scanning probe microscopy and electron microscopy.

References in corpus (1)

• Mixed-Stacking Few-Layer Graphene as an Elemental Weak Ferroelectric Material