Dynamical Properties of Chiral-Glass Order in Ceramic High-Tc Superconductors
Abstract
Description
There recently accumulated growing numerical and experimental evidence that a novel glassy zero-field phase characterized by the spontaneously broken time-reversal symmetry, a chiral-glass phase, is realized in certain ceramic high-$T_c$ superconductors. Existence of frustration in zero external field, arising from the d-wave pairing symmetry of high-$T_c$ superconductors, is essential to realize this phase. In this paper, we study the dynamical critical properties of the chiral-glass transition by means of Monte Carlo simulations, based on a lattice {\it XY} model with finite screening. We perform a dynamical scaling analysis, and the results are discussed in conjunction with recent ac magnetic susceptibility and transport measurements on high-$T_c$ ceramics.
Proceeding paper of the Workshop "Frontiers in Magnetism", Kyoto Oct.1999, submitted to Suppl. J. Phys. Soc. Jpn., Latex (4 figures)
Proceeding paper of the Workshop "Frontiers in Magnetism", Kyoto Oct.1999, submitted to Suppl. J. Phys. Soc. Jpn., Latex (4 figures)