Non-Equilibrium Josephson and Andreev Current through Interacting Quantum Dots

Details Non-Equilibrium Josephson and Andreev Current through Interacting Quantum Dots Non-Equilibrium Josephson and Andreev Current through Interacting Quantum Dots

2007-04-02

arxiv.org/abs/0704.0204v2

New J. Phys. 9 (2007) 278

Physics

Condensed Matter

Superconductivity

11 pages, 4 figures

Scientific paper

10.1088/1367-2630/9/8/278

We present a theory of transport through interacting quantum dots coupled to normal and superconducting leads in the limit of weak tunnel coupling. A Josephson current between two superconducting leads, carried by first-order tunnel processes, can be established by non-equilibrium proximity effect. Both Andreev and Josephson current is suppressed for bias voltages below a threshold set by the Coulomb charging energy. A $\pi$-transition of the supercurrent can be driven by tuning gate or bias voltages.

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