Topology optimization of type-II superconductors with superconductor-dielectric/vacuum interfaces based on Ginzburg-Landau theory under Weyl gauge

TL;DR

This paper introduces a topology optimization method for designing the structures of type-II superconductors with superconductor-dielectric/vacuum interfaces, using Ginzburg-Landau theory to improve flux pinning and current density.

Contribution

It presents a novel inverse design approach for superconductor geometries based on time-dependent Ginzburg-Landau equations under Weyl gauge.

Findings

Optimized superconductor geometries enhance flux pinning.

The approach effectively reduces dissipation.

Designs increase achievable current density.

Abstract

Geometrical design is a crucial and challenging strategy for improving the performance of type-II superconductors, because the proper placement of intended defects in the current path contribute to flux pinning, a reduction in dissipation, and an increase in achievable current density. Topology optimization is currently one of the most powerful approaches used to determine consistent structural geometries. Therefore, a topology optimization approach is presented to inversely design structural geometries of low- and high-temperature type-II superconductors with superconductor-dielectric/vacuum interfaces. In the presented approach, the magnetic response of type-II superconductors is modeled using the Ginzburg-Landau theory, where the temporal evolution of the order parameter and vector potential is described by the time-dependent Ginzburg-Landau equations under the Weyl gauge.