Chiral Glass Phase in Ceramic Superconductors

TL;DR

This study models ceramic superconductors as a 3D Josephson junction lattice, demonstrating the stability of the chiral glass phase under screening effects and linking it to experimental phenomena like the paramagnetic Meissner effect.

Contribution

It introduces a 3D lattice model with Monte Carlo simulations showing the stability of the chiral glass phase in ceramic superconductors.

Findings

Chiral glass phase remains stable with screening effects.

Nonlinear ac susceptibility exhibits characteristic behavior.

The compensation effect is attributed to the chiral glass phase.

Abstract

A three-dimensional lattice of the Josephson junctions with a finite self-conductance is employed to model the ceramic superconductors. By Monte Carlo simulations it is shown that the chiral glass phase is stable in three dimensions even under the influence of screening. The nonlinear ac susceptibility and the compensation effect are also studied. The compensation effect is shown to be due to the existence of the chiral glass phase. In agreement with experiments, this effect is demonstrated to be present in the ceramic superconductors which show the paramagnetic Meissner effect.