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

ASJC Scopus subject areas

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