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Applied Physics Letters / Volume 96 / Issue 26 / ELECTRONIC TRANSPORT AND SEMICONDUCTORS

Appl. Phys. Lett. 96, 262114 (2010); http://dx.doi.org/10.1063/1.3460291 (3 pages)

Control of transmission in disordered graphene nanojunctions through stochastic resonance

Luo-Luo Jiang1, Liang Huang2,3, Rui Yang2, and Ying-Cheng Lai2,4

1College of Physics and Technology, Guangxi Normal University, Guilin, Guangxi 541004, People's Republic of China and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, People's Republic of China
2School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA
3Institute of Computational Physics and Complex Systems, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
4Department of Physics, Arizona State University, Tempe, Arizona 85287, USA

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(Received 19 April 2010; accepted 15 June 2010; published online 2 July 2010)

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.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

Anderson model, electrical conductivity, graphene, nanostructured materials

PACS

  • 73.63.Bd

    Nanocrystalline materials

  • 73.40.-c

    Electronic transport in interface structures

  • 73.22.Pr

    Electronic structure of graphene

  • 73.20.Fz

    Weak or Anderson localization

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3460291

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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