Control of Coulomb blockade in a mesoscopic Josephson junction using single electron tunneling

Details Control of Coulomb blockade in a mesoscopic Josephson junction using single electron tunneling Control of Coulomb blockade in a mesoscopic Josephson junction using single electron tunneling

2003-06-02

arxiv.org/abs/cond-mat/0306023v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, RevTEX

Scientific paper

10.1063/1.1751231

We study a circuit where a mesoscopic Josephson junction (JJ) is embedded in an environment consisting of a large bias resistor and a normal metal - superconductor tunnel junction (NIS). The effective Coulomb blockade of the JJ can be controlled by the tunneling current through the NIS junction leading to transistor-like characteristics. We show using phase correlation theory and numerical simulations that substantial current gain with low current noise ($i_{n}\lesssim 1$ fA/$\sqrt{\text{Hz}}$) and noise temperature ($\lesssim $ 0.1 K) can be achieved. Good agreement between our numerical simulations and experimental results is obtained.

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