Vortex matter in a two-band SQUID-shaped superconducting film

TL;DR

This study explores vortex behavior, magnetization, and magnetic field distribution in a two-band superconducting SQUID-shaped film, revealing non-monotonic vortex patterns and vortex clustering influenced by Josephson coupling.

Contribution

It introduces a detailed analysis of vortex dynamics in a two-band superconductor with SQUID geometry considering Josephson coupling, which is a novel approach.

Findings

Non-monotonic vortex behavior observed

Vortex clusters generated due to Josephson coupling

Magnetization and magnetic field distributions characterized

Abstract

In the present work we studied the magnetization, vorticity, Cooper pairs density and the space distribution of the local magnetic field in a three-dimensional superconductor with a SQUID geometry (a square with a central hole connected to the outside vacuum through a very thin slit). Our investigation was carried out in both the Meissner-Oschenfeld and the Abrikosov state solving the two-band Ginzburg-Landau equations considering a Josephson coupling between the bands. We found a non-monotonic vortex behavior and the respective generation of vortex cluster due to the Josephson coupling used between condensates.