Unipolar transport in bilayer graphene controlled by multiple p-n interfaces

Details Unipolar transport in bilayer graphene controlled by multiple p-n interfaces Unipolar transport in bilayer graphene controlled by multiple p-n interfaces

2012-03-29

arxiv.org/abs/1203.6591v1

Applied Physics Letters 100, 163115 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

18 pages, 4 figures, Applied Physics Letters, in printing

Scientific paper

10.1063/1.3701592

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.

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