Singular field response and singular screening of vacancies in antiferromagnets
Strongly Correlated Electrons
2012-10-25 v2 Statistical Mechanics
Abstract
For isolated vacancies in ordered local-moment antiferromagnets we show that the magnetic-field linear-response limit is generically singular: The magnetic moment associated with a vacancy in zero field is different from that in a finite field h in the limit h->0. The origin is a universal and singular screening cloud, which moreover leads to perfect screening as h->0 for magnets which display spin-flop bulk states in the weak-field limit.
Keywords
Cite
@article{arxiv.1206.2927,
title = {Singular field response and singular screening of vacancies in antiferromagnets},
author = {Alexander Wollny and Eric C. Andrade and Matthias Vojta},
journal= {arXiv preprint arXiv:1206.2927},
year = {2012}
}
Comments
5 pages, 4 figs, (v2) 2-page supplement added, final version as published