Quantized conductance of a suspended graphene nanoconstriction

One of the most promising characteristics of graphene is the ability of charge carriers to travel through it ballistically over hundreds of nanometres.

Recent developments in the preparation of high mobility graphene should make it possible to study the effects of quantum confinement in graphene nanostructures in the ballistic regime. Of particular interest are those effects that arise from edge states, such as spin polarization at zigzag edges of graphene nanoribbons and the use of graphene’s valley-degeneracy for ‘valleytronics’....