Electronic Properties of Graphene Nanoribbons with Zigzag Armchair Edges
DOI:
https://doi.org/10.48165/Keywords:
Local Density of State, Optical Conductivity, Conductance, Disorder Effect, Transport Tight Binding Approach, Graphene Nanoribbon, Dangling Bond, Fermi LevelAbstract
We have studied the electronic properties of graphene nanoribbons with zigzag armchair edges. We have calculated the local density of states, the single particle special function, the optical conductivity and the conductance for different geometries. We have also studied the disordered effects. The influence of disorder on the transport behavior of tight binding approach has been accepted. The conductance of edge contacted graphene nanoribbon sensitivity was found dependent on the lead graphene nanoribbon matching conditions. In this respect armchair graphene nanoribbon enabled a somewhat better current injection. Dangling bonds on the graphene nanoribbon side of the interface substantially reduced the conductance. The typical conductance of disordered graphene nanoribbons sandwiched between graphene leads in a junction set up exhibited a negative differential conductivity whenever new transport channels become available by increasing the Fermi level. This accentuates the efficiency of Anderson localization function manifested a precursor of the transition from a current carrying to an Anderson disorder induced insulating behavior which takes place when the size of the disordered active graphene region becomes infinite. The obtained results were found in good agreement with previously obtained results.
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