Abstract
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 on-resonance high-transparency devices, 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 the Andreev reflection process.
- Received 27 November 2000
DOI:https://doi.org/10.1103/PhysRevB.63.195412
©2001 American Physical Society