Superconductor Quantum Dot Superconductor Junction in the Kondo Regime

Details Superconductor Quantum Dot Superconductor Junction in the Kondo Regime Superconductor Quantum Dot Superconductor Junction in the Kondo Regime

2001-11-22

arxiv.org/abs/cond-mat/0111442v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages 3 encapsuled figures

Scientific paper

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 $T_{K}$ and the superconducting gap $\Delta$. In particular, the $I-V$ curve exposes an excess current in the limit $T_{K}/\Delta \gg 1$.

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