Perfect Reflection of Chiral Fermions in Gated Graphene Nanoribbons
We describe the results of a theoretical study of transport through gated metallic graphene nanoribbons using a nonequilibrium Green function method. Although analogies with quantum field theory predict perfect transmission of chiral fermions through gated regions in one dimension, we find 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.
2009 American Chemical Society. Received January 21, 2009; Revised Manuscript Received March 16, 2009. J.M.K. would like to thank Mike Fischbein, Jens Bardarson, and Paul McEuen for their helpful suggestions. This work was supported by the Cornell Center for Materials Research. Page 1983. The acknowledgment should include the following: This work was also supported by the Department of Energy, Office of Science, through Award No. DE-FG02-07ER46432.
Submitted - 0901.3407v1.pdf