Spin-dependent features in the conductivity of graphene, chemically modified by a random distribution of hydrogen adatoms, are explored theoretically. The spin effects are taken into account using a mean-field self-consistent Hubbard model derived from first-principles calculations. A Kubo-Greenwood transport methodology is used to compute the spin-dependent transport fingerprints of weakly hydrogenated graphene-based systems with realistic sizes. Conductivity responses are obtained for paramagnetic, antiferromagnetic, or ferromagnetic macroscopic states, constructed from the mean-field solutions obtained for small graphene supercells. Magnetoresistance signals up to ∼7 are calculated for hydrogen densities around 0.25%. These theoretical results could serve as guidance for experimental observation of induced magnetism in graphene.
@article{arxiv.1105.1005,
title = {Magnetoresistance and Magnetic Ordering Fingerprints in Hydrogenated Graphene},
author = {David Soriano and Nicolas Leconte and Pablo Ordejón and Jean-Christophe Charlier and Juan José Palacios and Stephan Roche},
journal= {arXiv preprint arXiv:1105.1005},
year = {2014}
}