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Conductance fluctuations in graphene in the presence of long-range disorder
Author(s)
Liu, Bobo
Akis, Richard
Ferry, David K.
Bohra, Girish
Bird, Jonathan P.
Date Issued
March 4, 2016
Type
Article
Abstract
The fluctuations in the conductance of graphene that arise from a long-range disorder potential induced by random impurities are investigated with an atomic tight-binding lattice. The screened impurities lead to a slow variation of the background potential and this varies the overall potential landscape as the Fermi energy or an applied magnetic field is varied. As a result, the phase interference varies randomly and leads to fluctuations in the conductance. Recently, experiments have shown that an applied magnetic field produces a remarkable reduction in the amplitude of these conductance fluctuations. We find qualitative agreement with these experiments, and it appears that the reduction in magnetic field of the fluctuations arises from a field induced smoothing of the conductance landscape.
Citation
Journal of Physics Condensed Matter, 28(13), 2016