Magnetic field dependence of critical currents of cross-type Josephson junctions with inhomogeneous critical current density under oblique magnetic fields

TL;DR

This paper investigates how inhomogeneous critical current density affects the magnetic interference patterns of cross-type Josephson junctions under oblique magnetic fields, revealing more complex behaviors than previously known.

Contribution

It introduces a theoretical analysis of inhomogeneous critical current density effects on magnetic interference in Josephson junctions under oblique fields, expanding understanding beyond homogeneous cases.

Findings

More complex magnetic interference patterns observed

Inhomogeneity in current density influences interference behavior

Theoretical model explains the origin of complex patterns

Abstract

Studies of the magnetic interference of sandwich-type Josephson junctions in which perpendicular or oblique magnetic fields are applied to the junction plane have received less attention than those where the applied magnetic fields are parallel. Recently, it has been theoretically demonstrated that a variety of magnetic interferences of the critical currents appear when oblique magnetic fields are applied to a cross-type junction with homogeneous critical current density. We theoretically investigated the effect of the inhomogeneous critical current density in the junction plane, and found that more complicated magnetic interferences appeared. We considered the distribution of the current density flowing through the junction plane to explore the cause of these complex magnetic interferences.