Visualizing Complex Moiré Patterns and Lattice Reconstructions in Twisted Multilayer Graphene by Scanning Tunneling Microscopy

Beyond twisted bilayer graphene, recent studies have proposed devices consisting of multiple graphene layers with near magic-angle twists, as a promising platform for experimentally realizing correlated topological states. Moiré superlattices originating from consecutive layers are expected to experience lattice relaxation that significantly modifies the electronic band structures .

Here, we present our progress in characterizing structural and electronic properties of a twisted multilayer graphene device using scanning probe microscopy, with focusing on regions of twisted mono-bilayer (1L+2L); helical trilayer regions (1L+1L+1L) and regions with two twisted layers twisted on top of Bernal bilayer (1L+1L+2L), forming various triangular domains that provide insight to how lattice relaxation modifies the electronic band structures.