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 electrode. We discuss a theoretical model of the device and compare the calculated differential conductance with the experimental data.
Buitelaar
M R
MR
Institut für Physik, Universität Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland.
Belzig
W
W
Nussbaumer
T
T
Babić
B
B
Bruder
C
C
Schönenberger
C
C