Multiple Andreev reflections in a carbon nanotube quantum dot |
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Authors: | Buitelaar M R Belzig W Nussbaumer T Babić B Bruder C Schönenberger C |
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Institution: | Institut für Physik, Universit?t Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland. |
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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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