Abstract
Using a generalized Landauer approach we study the nonlinear transport in mesoscopic graphene with zigzag and armchair edges. We find that for clean systems, the low-bias low-temperature conductance, , of an armchair edge system is quantized as , whereas for a zigzag edge the quantization changes to , where is the transmission probability and is an integer. We also study the effects of a nonzero bias, temperature, and magnetic field on the conductance. The magnetic field dependence of the quantization plateaus in these systems is somewhat different from the one found in the two-dimensional electron gas due to a different Landau level quantization.
2 More- Received 21 December 2005
DOI:https://doi.org/10.1103/PhysRevB.73.195411
©2006 American Physical Society