Multiple Andreev Reflections in a Carbon Nanotube Quantum Dot

M. R. Buitelaar, W. Belzig, T. Nussbaumer, B. Babic, C. Bruder, C. Schoenenberger

Published 2003-04-10Version 1

We report resonant multiple Andreev relections 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. (pdf including figures, see: www.unibas.ch/phys-meso/Research/Papers/2003/MAR-MWNT.pdf)