Defining and controlling double quantum dots in single-walled carbon nanotubes

Details Defining and controlling double quantum dots in single-walled carbon nanotubes Defining and controlling double quantum dots in single-walled carbon nanotubes

2006-05-09

arxiv.org/abs/cond-mat/0605220v1

Semicond. Sci. Technol. 21, 64-68 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 3 figures

Scientific paper

10.1088/0268-1242/21/11/S09

We report the experimental realization of double quantum dots in single-walled carbon nanotubes. The device consists of a nanotube with source and drain contact, and three additional top-gate electrodes in between. We show that, by energizing these top-gates, it is possible to locally gate a nanotube, to create a barrier, or to tune the chemical potential of a part of the nanotube. At low temperatures we find (for three different devices) that in certain ranges of top-gate voltages our device acts as a double quantum dot, evidenced by the typical honeycomb charge stability pattern.

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