Atomistic quantum transport modeling of metal-graphene nanoribbon heterojunctions

Details Atomistic quantum transport modeling of metal-graphene nanoribbon heterojunctions Atomistic quantum transport modeling of metal-graphene nanoribbon heterojunctions

2010-10-21

arxiv.org/abs/1010.4393v1

Phys. Rev. B 82, 161413(R) (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevB.82.161413

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.

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