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Phys Rev Lett. 2002 Dec 16;89(25):256801. Epub 2002 Dec 4.

Quantum dot in the Kondo regime coupled to superconductors.

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


The Kondo effect and superconductivity are both prime examples of many-body phenomena. Here we report transport measurements on a carbon nanotube quantum dot coupled to superconducting leads that show a delicate interplay between both effects. We demonstrate that the superconductivity of the leads does not destroy the Kondo correlations on the quantum dot when the Kondo temperature, which varies for different single-electron states, exceeds the superconducting gap energy.

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