Figure 1: A piece of a honeycomb lattice displaying zigzag edges with Ly = 4 which defines the width of the ribbon in the transverse direction and Lx = 12, which defines the length in the longitudinal direction.
From: Triplet p-wave pairing correlation in low-doped zigzag graphene nanoribbons
The lattice sites at zigzag edge are much larger than the sites in the bulk, indicating that the charge carriers are moving along the edge.
