Resonant Andreev reflection through superconductor-carbon-nanotube devices was investigated theoretically with a focus on the superconducting proximity effect. Consistent with a recent experiment, we find that for high transparency devices on-resonance, the Andreev current is characterized by a large value and a resistance dip; low-transparency off-resonance devices give the opposite result. We also give evidence that the observed low-temperature transport anomaly may be a natural result of Andreev reflection process.
@article{arxiv.cond-mat/0103210,
title = {Resonant Andreev reflections in superconductor-carbon-nanotube devices},
author = {Yadong Wei and Jian Wang and Hong Guo and Hatem Mehrez and R. Roland},
journal= {arXiv preprint arXiv:cond-mat/0103210},
year = {2009}
}