Chiral Glass Phase in Ceramic Superconductors
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.
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