Mesoscopic conductance fluctuations in graphene

Details Mesoscopic conductance fluctuations in graphene Mesoscopic conductance fluctuations in graphene

2009-02-05

arxiv.org/abs/0902.0904v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 6 figures. Submitted to the proceedings of Graphene Week 2008 (Trieste, Italy)

Scientific paper

We study fluctuations of the conductance of micron-sized graphene devices as a function of the Fermi energy and magnetic field. The fluctuations are studied in combination with analysis of weak localization which is determined by the same scattering mechanisms. It is shown that the variance of conductance fluctuations depends not only on inelastic scattering that controls dephasing but also on elastic scattering. In particular, contrary to its effect on weak localization, strong intervalley scattering suppresses conductance fluctuations in graphene. The correlation energy, however, is independent of the details of elastic scattering and can be used to determine the electron temperature of graphene structures.

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