Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-08-22
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
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Scientific paper
We calculate the shot noise generated by evanescent modes in graphene for several experimental setups. For two impurity-free graphene strips kept at the Dirac point by gate potentials, separated by a long highly doped region, we find that the Fano factor takes the universal value F = 1/4. For a large superlattice consisting of many strips gated to the Dirac point interspersed among doped regions, we find F = 1/(8 ln 2). These results differ from the value F = 1/3 predicted for a disordered metal, providing an unambiguous experimental signature of evanescent mode transport in graphene.
Kindermann Markus
Wiener A. D.
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