A triple quantum dot in a single-wall carbon nanotube

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A top-gated single-wall carbon nanotube is used to define three coupled quantum dots in series between two electrodes. The additional electron number on each quantum dot is controlled by top-gate voltages allowing for current measurements of single, double, and triple quantum dot stability diagrams. Simulations using a capacitor model including tunnel coupling between neighboring dots captures the observed behavior with good agreement. Furthermore, anticrossings between indirectly coupled levels and higher order cotunneling are discussed.
Udgivelsesdato: April
Original languageEnglish
JournalNano Letters
Issue number4
Pages (from-to)1055-1060
Publication statusPublished - 2008

ID: 10478833