Abstract
Electron transport between two superconductors through an Anderson impurity in the Kondo regime is investigated within the slave boson mean-field approximation. The current, shot-noise power and Fano factor are displayed versus the applied bias voltage in the subgap region and found to be strongly dependent on the ratio between the Kondo temperature and the superconducting gap In particular, the curve exposes an excess current in the limit
- Received 31 October 2002
DOI:https://doi.org/10.1103/PhysRevB.67.041301
©2003 American Physical Society