Magnetic field dependence of the critical current in a granular s-wave Superconductor

TL;DR

This paper investigates how magnetic fields affect the critical current in granular s-wave superconductors, comparing rectangular and circular junction models to understand their influence on Josephson coupling.

Contribution

It introduces a comparative analysis of rectangular and circular junction models to explain the magnetic field dependence of critical current in granular superconductors.

Findings

Circular junction model yields higher maximum critical current than rectangular model.

Magnetic field dependence varies between the two junction geometries.

The study enhances understanding of Josephson coupling in granular superconductors.

Abstract

The magnetic field dependences of the critical-current of a granular s-wave superconductor has been determined by considering the rectangular and circular junction model of an array of small superconducting particles which interacting by Josephson coupling through insulating barriers. We will show that in the case of circular model, the maximum critical current of the Josephson current is larger than that of rectangular model.