Control of transmission in disordered graphene nanojunctions through stochastic resonance

Luo Luo Jiang, Liang Huang, Rui Yang, Ying-Cheng Lai

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Abstract

We investigate electronic transport in graphene nanojunctions and find that the transmission (or the conductance) can exhibit a nonmonotonic behavior with respect to variation in the strength of disorder, mimicking a stochastic resonance. The general setting for this remarkable phenomenon is where the graphene device possesses localized states in the absence of disorder, i.e., the localized edge states specific to graphene. A small amount of disorder can then break the localization and lead to an enhancement in the transmission. For strong disorder, Anderson localization [Phys. Rev. 109, 1492 (1958)] sets in, causing the transmission to decrease. The phenomenon is robust and can occur with or without magnetic field.

Original languageEnglish (US)
Article number262114
JournalApplied Physics Letters
Volume96
Issue number26
DOIs
StatePublished - Jun 28 2010

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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