Most nonferroelectric two-dimensional materials can be endowed with so-called sliding
ferroelectricity via nonequivalent homobilayer stacking, which is not applicable to …

Although the monolayers of most 2D materials are non‐ferroelectric with highly symmetric
lattices, symmetry breaking may take place in their bilayers upon some stacking …

At the interface of van der Waals heterostructures, the crystal symmetry and the electronic
structure can be reconstructed, giving rise to physical properties superior to or absent in …

The constituent particles of matter can arrange themselves in various ways, giving rise to
emergent phenomena that can be surprisingly rich and often cannot be understood by …

Two-dimensional (2D) ferroelectrics with robust polarization down to atomic thicknesses
provide building blocks for functional heterostructures. Experimental realization remains …

Ferroelectricity (Valasek, J. Phys. Rev. 1921, 17, 475), a spontaneous formation of electric
polarization, is a solid state phenomenon, usually, associated with ionic compounds or …

Twisted graphene bilayers provide a versatile platform to engineer metamaterials with novel
emergent properties by exploiting the resulting geometric moiré superlattice. Such …

Moiré superlattices of 2D materials with a small twist angle are thought to exhibit
appreciable flexoelectric effect, though unambiguous confirmation of their flexoelectricity is …

Motivated by recent reports of nematic order in twisted bilayer graphene (TBG), we
investigate the impact of the triangular moiré superlattice degrees of freedom on nematicity …

We investigate twisted double bilayer graphene (TDBG), a four-layer system composed of
two AB-stacked graphene bilayers rotated with respect to each other by a small angle. Our …