Dynamical Properties of Chiral-Glass Order in Ceramic High-Tc Superconductors
Abstract
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-Tc superconductors. Existence of frustration in zero external field, arising from the d-wave pairing symmetry of high-Tc 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 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-Tc ceramics.
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