We calculate quantum transport for metal-graphene nanoribbon heterojunctions within the atomistic self-consistent Schr\"odinger/Poisson scheme. Attention is paid on both the chemical aspects of the interface bonding as well the one-dimensional electrostatics along the ribbon length. Band-bending and doping effects strongly influence the transport properties, giving rise to conductance asymmetries and a selective suppression of the subband formation. Junction electrostatics and p-type characteristics drive the conduction mechanism in the case of high work function Au, Pd and Pt electrodes, while contact resistance becomes dominant in the case of Al.
@article{arxiv.1010.4393,
title = {Atomistic quantum transport modeling of metal-graphene nanoribbon heterojunctions},
author = {I. Deretzis and G. Fiori and G. Iannaccone and A. La Magna},
journal= {arXiv preprint arXiv:1010.4393},
year = {2010}
}