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PubMed · 16178222

Gate-defined quantum dots on carbon nanotubes.

M J Biercuk·S Garaj·N Mason·J M Chow·C M Marcus
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Abstract

We report the realization of nanotube-based multiple quantum dots that are fully defined and controlled with electrostatic gates. Metallic top-gates are used to produce localized depletion regions in the underlying tubes; a pair of such depletion regions in a nanotube with ohmic contact electrodes defines the quantum dot. Top-gate voltages tune the transparencies of tunnel barriers as well as the electrostatic energies within single and multiple dots. This approach allows precise control over multiple devices on a single tube, and serves as a design paradigm for nanotube-based electronics and quantum systems.

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CrystallizationElectric ConductivityElectrochemistryNanotechnologyNanotubes, CarbonQuantum DotsSemiconductorsStatic ElectricityEvaluation StudyJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, Non-P.H.S.

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M J Biercuk, S Garaj, N Mason, J M Chow, C M Marcus. 2005. Gate-defined quantum dots on carbon nanotubes.. https://doi.org/10.1021/nl050364v

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