Figure 4: Measured decaying DOS from a zigzag edge to the bulk of a graphene layer.
From: Energy Bandgap and Edge States in an Epitaxially Grown Graphene/h-BN Heterostructure

(a) Measured (full black squares) and calculated (full red circles) difference in dI/dV (decaying edge state) at locations away from a zigzag edge. (b) Theoretical k dependence of partial DOS with on-site Coulomb repulsion at the zigzag edge (blue) and at 3 lattice constants (red), 6 lattice constants (green), 9 lattice constants (black), and 12 lattice constants (purple) from the edge.