Effect of current injection into thin-film Josephson junctions

TL;DR

This paper investigates how injecting current into thin-film Josephson junctions influences their phase distribution, proposing a calculation method for current distribution in specific strip geometries to enhance control of Josephson phenomena.

Contribution

It introduces a novel method to calculate injected current distribution in thin-film Josephson junctions with arbitrary source-sink positions.

Findings

Calculated current distribution for specific geometries.

Enhanced understanding of phase control in Josephson junctions.

Potential for improved device design and functionality.

Abstract

New thin-film Josephson junctions have recently been tested in which the current injected into one of the junction banks governs Josephson phenomena. One thus can continuously manage the phase distribution at the junction by changing the injected current. A method of calculating the distribution of injected currents is proposed for a half-infinite thin-film strip with source-sink points at arbitrary positions at the film edges. The strip width $W$ is assumed small relative to $\Lambda=2\lambda^2/d$, $\lambda$ is the bulk London penetration depth of the film material, $d$ is the film thickness.