title: Magnetoresistance and magnetic ordering fingerprints in hydrogenated graphene.
abstract: 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 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.
authors.affiliation: Departamento de Física Aplicada, Universidad de Alicante, San Vicente del Raspeig, Spain.
authors.forename: David
authors.initials: D
authors.lastname: Soriano
authors.forename: Nicolas
authors.initials: N
authors.lastname: Leconte
authors.forename: Pablo
authors.initials: P
authors.lastname: Ordejón
authors.forename: Jean-Christophe
authors.initials: JC
authors.lastname: Charlier
authors.forename: Juan-Jose
authors.initials: JJ
authors.lastname: Palacios
authors.forename: Stephan
authors.initials: S
authors.lastname: Roche