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

J. Hassel·J. Delahaye·H. Seppa·P. Hakonen
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Abstract

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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J. Hassel, J. Delahaye, H. Seppa, P. Hakonen. 2003-11-04. Control of Coulomb blockade in a mesoscopic Josephson junction using single electron tunneling. https://doi.org/10.1063/1.1751231

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