Tilted potential induced coupling of localized states in a graphene nanoconstriction

We use the charged tip of a low temperature scanning probe microscope to perturb the transport through a graphene nanoconstriction. Maps of the conductance as a function of tip position display concentric halos, and by following the expansion of the halos with back-gate voltage we are able to identi...

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Bibliographic Details
Published inarXiv.org
Main Authors Connolly, M R, Chiu, K L, Lombardo, A, Fasoli, A, Ferrari, A C, Anderson, D, Jones, G A C, Smith, C G
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 07.09.2010
Subjects
Coupling
Graphene
Halos
Microscopes
Physics - Materials Science
Physics - Mesoscale and Nanoscale Physics
Resistance
Scanning probe microscopes
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Summary:We use the charged tip of a low temperature scanning probe microscope to perturb the transport through a graphene nanoconstriction. Maps of the conductance as a function of tip position display concentric halos, and by following the expansion of the halos with back-gate voltage we are able to identify an elongated domain over the nanoconstriction where they originate. Amplitude modulations of the transmission resonances are correlated with the gradient of the tip-induced potential and we analyze this in terms of modified coupling between localized states.
ISSN:2331-8422
DOI:10.48550/arxiv.1009.1103