Anomalously large conductance fluctuations in weakly disordered graphene

@article{Rycerz2006AnomalouslyLC,
  title={Anomalously large conductance fluctuations in weakly disordered graphene},
  author={Adam Rycerz and Jakub Tworzydło and C. W. J. Beenakker},
  journal={EPL (Europhysics Letters)},
  year={2006},
  volume={79},
  pages={57003}
}
We have studied numerically the mesoscopic fluctuations of the conductance of a graphene strip (width W larger than length L), in an ensemble of samples with different realizations of the random electrostatic potential landscape. For strong disorder (potential fluctuations comparable to the hopping energy), the variance of the conductance approximates the value predicted by the Altshuler-Lee-Stone theory of universal conductance fluctuations, Var GUCF=0.12 (W/L)(2e2/h)2. For weaker disorder the… 
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Qualitative agreement is found with experiments shown that an applied magnetic field produces a remarkable reduction in the amplitude of these conductance fluctuations, and it appears that the reduction in magnetic field of the fluctuations arises from a field induced smoothing of the conductance landscape.

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