Unipolar transport in bilayer graphene controlled by multiple p-n interfaces
arXiv:1203.6591 · doi:10.1063/1.3701592
Abstract
Unipolar transport is demonstrated in a bilayer graphene with a series of p-n junctions and is controlled by electrostatic biasing by a comb-shaped top gate. The OFF state is induced by multiple barriers in the p-n junctions, where the band gap is generated by applying a perpendicular electric field to the bilayer graphene, and the ON state is induced by the p-p or n-n configurations of the junctions. As the number of the junction increases, current suppression in the OFF state is pronounced. The multiple p-n junctions also realize the saturation of the drain current under relatively high source-drain voltages.
arXiv comment18 pages, 4 figures, Applied Physics Letters, in printing
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