Magnetoresistance and magnetic ordering fingerprints in hydrogenated graphene

David Soriano, Nicolas Leconte, Pablo Ordejón, Jean Christophe Charlier, Juan Jose Palacios, Stephan Roche

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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. © 2011 American Physical Society.
Original languageEnglish
Article number016602
JournalPhysical Review Letters
Volume107
Issue number1
DOIs
Publication statusPublished - 30 Jun 2011

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    Soriano, D., Leconte, N., Ordejón, P., Charlier, J. C., Palacios, J. J., & Roche, S. (2011). Magnetoresistance and magnetic ordering fingerprints in hydrogenated graphene. Physical Review Letters, 107(1), [016602]. https://doi.org/10.1103/PhysRevLett.107.016602