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Abstract: We study the DC transport of finite graphene samples with random gap. UsingDirac fermions to describe the low-energy physics near the Dirac point, weemploy a generalized Drude form for the conductivity. The latter is constantfor a vanishing average gap but always decreases with increasing sample sizefor a nonzero average gap. The asymptotic conductivity of the infinite sampleis either nonzero if the average gap is smaller than a critical value or zerootherwise. Our results are in agreement with recent numerical calculations ofBardarson et al





Autor: K. Ziegler, A. Sinner

Fuente: https://arxiv.org/



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