Dynamic spin-glass behavior in a disorder-free, two-component model of quantum frustrated magnets
Abstract
Motivated by the observation of a spin-glass transition in almost disorder-free Kagome antiferromagnets, and by the specific form of the effective low-energy model of the S=1/2, trimerized Kagome antiferromagnet, we investigate the possibility to obtain a spin-glass behavior in two-component, disorder-free models. We concentrate on a toy-model, a modified Ashkin-Teller model in a magnetic field that couples only to one species of spins, for which we prove that a dynamic spin-glass behavior occurs. The dynamics of the magnetization is closely related to that of the underlying Ising model in zero field in which spins and pseudo-spins are intimately coupled. The spin-glass like history dependence of the magnetization is a consequence of the ageing of the underlying Ising model.
Keywords
Cite
@article{arxiv.cond-mat/0109406,
title = {Dynamic spin-glass behavior in a disorder-free, two-component model of quantum frustrated magnets},
author = {Frederic Mila and David Dean},
journal= {arXiv preprint arXiv:cond-mat/0109406},
year = {2009}
}
Comments
6 pages, LateX, 4 Figures; 1 Figure added, title, abstract and introduction modified, 2 references added. To appear in EPJB