Local Gate Control of a Carbon Nanotube Double Quantum Dot

N. Mason, M. J. Biercuk, C. H. Marcus

Research output: Contribution to journalArticle

Abstract

We have measured carbon nanotube quantum dots with multiple electrostatic gates and used the resulting enhanced control to investigate a nanotube double quantum dot. Transport measurements reveal honeycomb charge stability diagrams as a function of two nearly independent gate voltages. The device can be tuned from weak to strong interdot tunnel-coupling regimes, and the transparency of the leads can be controlled independently. We extract values of energy-level spacings, capacitances, and interaction energies for this system. This ability to control electron interactions in the quantum regime in a molecular conductor is important for applications such as quantum computation.

Original languageEnglish (US)
Pages (from-to)655-658
Number of pages4
JournalScience
Volume303
Issue number5658
DOIs
StatePublished - Jan 30 2004
Externally publishedYes

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Quantum Dots
Carbon Nanotubes
Nanotubes
Static Electricity
Electrons
Equipment and Supplies

ASJC Scopus subject areas

  • General

Cite this

Local Gate Control of a Carbon Nanotube Double Quantum Dot. / Mason, N.; Biercuk, M. J.; Marcus, C. H.

In: Science, Vol. 303, No. 5658, 30.01.2004, p. 655-658.

Research output: Contribution to journalArticle

Mason, N. ; Biercuk, M. J. ; Marcus, C. H. / Local Gate Control of a Carbon Nanotube Double Quantum Dot. In: Science. 2004 ; Vol. 303, No. 5658. pp. 655-658.
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