Tilted potential induced coupling of localized states in a graphene nanoconstriction
Tilted potential induced coupling of localized states in a graphene nanoconstriction
We use the charged tip of a low-temperature scanning probe microscope to perturb the transport through a graphene nanoconstriction. Maps of the conductance as a function of tip position display concentric halos and, by following the expansion of the halos with back-gate voltage, we are able to identify an elongated …