▎ 摘　　要

Conductance fluctuation of edge-disordered graphene nanoribbons (ED-GNRs) is examined using the non-equilibrium Green's function technique combined with the extended Huckel approximation. The mean free path lambda and the localization length xi of the ED-GNRs are determined to classify the quantum transport regimes. In the diffusive regime where the length L-c of the ED-GNRs is much longer than lambda and much shorter than xi, the conductance histogram is given by a Gaussian distribution function with universal conductance fluctuation. In the localization regime where L-c >> xi, the histogram is no longer the universal Gaussian distribution but a lognormal distribution that characterizes Anderson localization. (C) 2014 AIP Publishing LLC.