Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-12-22
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 4 figures. Accepted in Physical Review Letters
Scientific paper
Quantum transport properties of disordered graphene with structural defects (Stone-Wales and divacancies) are investigated using a realistic {\pi}-{\pi}* tight-binding model elaborated from ab initio calculations. Mean free paths and semiclassical conductivities are then computed as a function of the nature and density of defects (using an order-N real-space Kubo-Greenwood method). By increasing of the defect density, the decay of the semiclassical conductivities is predicted to saturate to a minimum value of 4e^2/{\pi}h over a large range (plateau) of carrier density (> 0.5 10^{14}cm^{-2}). Additionally, strong contributions of quantum interferences suggest that the Anderson localization regime could be experimentally measurable for a defect density as low as 1%.
Charlier Jean-Christophe
Declerck Xavier
Dubois Simon M. -M.
Lherbier Aurelien
Niquet Yann-Michel
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