Perfect Reflection of Chiral Fermions in Gated Graphene Nanoribbons

Jesse M. Kinder, Jonathan J. Dorando, Haitao Wang, Garnet K. -L. Chan

Published 2009-01-22Version 1

We describe the results of a theoretical study of transport through gated metallic graphene nanoribbons using a non-equilibrium Green function method. Although analogies with quantum field theory predict perfect transmission of chiral fermions through gated regions in one dimension, we find \emph{perfect reflection} of chiral fermions in armchair ribbons for specific configurations of the gate. This effect should be measurable in narrow graphene constrictions gated by a charged carbon nanotube.