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arXiv · 0910.1337

Current-Phase Relation and Josephson Inductance of Superconducting Cooper Pair Transistor

Antti Paila·David Gunnarsson·Jayanta Sarkar·Mika A. Sillanpää·Pertti J. Hakonen
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Abstract

We have investigated the Josephson inductance $L_J$ of a Superconducting Cooper Pair Transistor (SCPT). We traced the inductance using microwave reflection measurements on a tuned resonance circuit in which a SCPT was mounted in parallel to a $ \sim 200$ pH strip line inductance. When the inverse of the Josephson inductance, determined on the charge-phase bias plane for a SCPT with a Josephson to Coulomb energy ratio of $E_J/E_C =1.75$, is integrated over the phase, we obtain a current-phase relation, which is strongly non-sinusoidal near the charge degeneracy point.

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Antti Paila, David Gunnarsson, Jayanta Sarkar, Mika A. Sillanpää, Pertti J. Hakonen. 2009-10-07. Current-Phase Relation and Josephson Inductance of Superconducting Cooper Pair Transistor. https://doi.org/10.1103/physrevb.80.144520

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