Disorder Effects in the Quantum Hall Effect of Graphene p-n Junctions

Details Disorder Effects in the Quantum Hall Effect of Graphene p-n Junctions Disorder Effects in the Quantum Hall Effect of Graphene p-n Junctions

2008-07-08

arxiv.org/abs/0807.1157v2

Phys. Rev. B 78, 205308 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 5 figures

Scientific paper

10.1103/PhysRevB.78.205308

The quantum Hall effect in graphene p-n junctions is studied numerically with emphasis on the effect of disorder at the interface of two adjacent regions. Conductance plateaus are found to be attached to the intensity of the disorder, and are accompanied by universal conductance fluctuations in the bipolar regime, which is in good agreement with theoretical predictions of the random matrix theory on quantum chaotic cavities. The calculated Fano factors can be used in an experimental identification of the underlying transport character.

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