We study the changes in the electronic structure induced by lattice defects in graphene planes. In many cases, lattice distortions give rise to localized states at the Fermi level. Electron-electron interactions lead to the existence of local moments. The RKKY interaction between these moments is always ferromagnetic, due to the semimetallic properties of graphene
@article{arxiv.cond-mat/0505557,
title = {Local defects and ferromagnetism in graphene layers},
author = {M. A. H. Vozmediano and M. P. Lopez-Sancho and T. Stauber and F. Guinea},
journal= {arXiv preprint arXiv:cond-mat/0505557},
year = {2009}
}