We study the competition between the spin-Peierls and the antiferromagnetic ordering in disordered quasi-one-dimensional spin systems. We obtain the temperature vs disorder-strength phase diagram, which qualitatively agrees with recent experiments on doped CuGeO_3.
@article{arxiv.cond-mat/9712098,
title = {Phase diagram of disordered spin-Peierls systems},
author = {Maxim Mostovoy and Daniel Khomskii and Jasper Knoester},
journal= {arXiv preprint arXiv:cond-mat/9712098},
year = {2009}
}