Multiple Andreev reflections in a carbon nanotube quantum dot

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 ele...

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Bibliographic Details
Published in:Physical review letters 2003-08, Vol.91 (5), p.057005-057005, Article 057005
Main Authors: Buitelaar, M R, Belzig, W, Nussbaumer, T, Babić, B, Bruder, C, Schönenberger, C
Format: Article
Language:English
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.91.057005