Quantum dot behavior in graphene nanoconstrictions

Details Quantum dot behavior in graphene nanoconstrictions Quantum dot behavior in graphene nanoconstrictions

2008-11-03

arxiv.org/abs/0811.0565v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

published version: 24 pages, 9 figures (includes supplementary information)

Scientific paper

10.1021/nl803291b

Graphene nanoribbons display an imperfectly understood transport gap. We measure transport through nanoribbon devices of several lengths. In nanoribbons of length greater than or equal to 250 nm we observe transport through multiple quantum dots in series, while shorter constrictions of length less than or equal to 60 nm display behavior characteristic of single and double quantum dots. Dot size scales with constriction width. We propose a model where transport occurs through quantum dots that are nucleated by background disorder potentials in the presence of a confinement gap.

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