Equilibrium and dynamic properties of d-wave ceramic superconductors

D. DOMINGUEZ; H. KAWAMURA; M. S. LI

Frontiers in superconductivity research

Nova Science Publishers, Inc.

Año: 2004; p. 53 - 73

We present a review of the results of our simulations on equilibrium and dynamic properties of the $d$-wave ceramic high-$T_c$ superconductors. We represent disordered superconductors by a three-dimensional lattice model of randomly distributed $\pi$ Josephson junctions with finite self-inductance. The paramagnetic Meissner effect observed experimentally in ceramic high-$T_c$ superconductors is well reproduced by this model. In equilibrium, one can show that there is a low temperature chiral glass phase, which is characterized by chiralities frozen in time and in space. Experimental attempts on the search for the chiral glass phase are discussed. Dynamical phenomena such as anomalous microwave absorption, AC resistivity and enhancement of critical current by external electric fields are also considered by Langevin dynamics simulations. A satisfactory agreement of the simulations with several experiments in ceramic high $T_c$ superconductors was obtained.