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Two-Dimensional Graphene with Structural Defects: Elastic Mean Free Path, Minimum Conductivity, and Anderson Transition

AuthorsRoche, Stephan ; Charlier, Jean-Christopher
Issue Date2011
PublisherAmerican Physical Society
CitationPhysical Review Letters 106(4): 046803 (2011)
AbstractQuantum transport properties of disordered graphene with structural defects (Stone-Wales and divacancies) are investigated using a realistic π-π* 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 the defect density, the decay of the semiclassical conductivities is predicted to saturate to a minimum value of 4e2/πh over a large range (plateau) of carrier density (>0.5×1014  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%.
Description4 páginas, 4 figuras.-- PACS numbers: 73.23. b, 72.15.Rn, 73.43.Qt.-- et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.106.046803
Appears in Collections:(CIN2) Artículos
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