Charge accumulation at the boundaries of a graphene strip induced by a gate voltage: Electrostatic approach

Details Charge accumulation at the boundaries of a graphene strip induced by a gate voltage: Electrostatic approach Charge accumulation at the boundaries of a graphene strip induced by a gate voltage: Electrostatic approach

2007-07-23

arxiv.org/abs/0707.3463v3

Phys. Rev. B 77, 155436 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 6 figures, Title changed due to Editor

Scientific paper

10.1103/PhysRevB.77.155436

Distribution of charge induced by a gate voltage in a graphene strip is investigated. We calculate analytically the charge profile and demonstrate a strong(macroscopic) charge accumulation along the boundaries of a micrometers-wide strip. This charge inhomogeneity is especially important in the quantum Hall regime where we predict the doubling of the number of edge states and coexistence of two different types of such states. Applications to graphene-based nanoelectronics are discussed.

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