High Current-Induced Electron Redistribution in a CVD-Grown Graphene Wide Constriction

Figure 1

(a) Scanning electron microscopy image with 0.5 μm scale bar near the single layer graphene region of the CVD graphene wide constriction. The white dash line showed the outline of single layer graphene. Inset shows the optical contrast in single layer graphene wide constriction region. (b) Electrical setup with AC source-drain current passed through the wide constriction region used to perform scanning gate microscopy with DC voltage on the tip and the height to the surface ( nm) for slight perturbations.

(a)

(b)