Disorder correlations at smeared phase transitions
Strongly Correlated Electrons
2012-01-19 v3 Disordered Systems and Neural Networks
Abstract
We investigate the influence of spatial disorder correlations on smeared phase transitions, taking the quantum phase transition in itinerant magnets as an example. We find that even short-range correlations can have a dramatic effect and qualitatively change the behavior of observable quantities. This is in marked contrast to conventional critical phenomena, at which short-range disorder correlations are irrelevant. We develop an optimal fluctuation theory of the quantum phase transition in the presence of correlated disorder, and we illustrate the results by computer simulations. As an experimental application, we discuss the ferromagnetic quantum phase transition in SrCaRuO.
Cite
@article{arxiv.1109.4290,
title = {Disorder correlations at smeared phase transitions},
author = {Christopher Svoboda and David Nozadze and Fawaz Hrahsheh and Thomas Vojta},
journal= {arXiv preprint arXiv:1109.4290},
year = {2012}
}
Comments
6 pages, 4 eps figures, final version as published