Unmatched Possibilities for Moire Heterostructures
Aaron Dunbrack
Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA
Over the past decade, moire heterostructures have drawn significant attention as a recipe for engineering flat bands and finding interacting states of matter. Initially inspired by twisted bilayer graphene (TBG), the paradigm has since been extended to other materials, including hBN, TMDs, magnets, and topological insulators. For all these materials, one design constraint remains: the two layers must have (approximately) the same lattice constant in order to induce moire. In this talk, I discuss methods for lifting this constraint.
The first half of my talk will focus on near-commensurate moire: the moire patterns that can arise when one begins with commensurate lattices, rather than identical ones. I will mostly focus on a specific model that makes perfectly flat bands in a single layer of graphene. The second half of my talk will discuss intrinsically multilayer moire heterostructures, which use three or more layers to make moire from *any* combination of lattice constants.
