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Phys Rev Lett. 2003 Aug 1;91(5):057005. Epub 2003 Aug 1.

Multiple Andreev reflections in a carbon nanotube quantum dot.

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  • 1Institut für Physik, Universität Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.

Abstract

We report resonant multiple Andreev reflections in a multiwall carbon nanotube quantum dot coupled to superconducting leads. The position and magnitude of the subharmonic gap structure is found to depend strongly on the level positions of the single-electron states which are adjusted with a gate electrode. We discuss a theoretical model of the device and compare the calculated differential conductance with the experimental data.

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