Shot Noise in Lithographically Patterned Graphene Nanoribbons
arXiv:1308.5947 · doi:10.1103/PhysRevB.88.245415
Abstract
We have investigated shot noise and conductance of multi-terminal graphene nanoribbon devices at temperatures down to 50 mK. Away from the charge neutrality point, we find a Fano factor , nearly independent of the charge density. Our shot noise results are consistent with theoretical models for disordered graphene ribbons with a dimensionless scattering strength corresponding to rather strong disorder. Close to charge neutrality, an increase in up to is found, which indicates the presence of a dominant Coulomb gap possibly due to a single quantum dot in the transport gap.
5 pages, 5 figures
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