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Title

Magnetoresistance and magnetic ordering fingerprints in hydrogenated graphene

AuthorsSoriano, David ; Leconte, Nicolás ; Ordejón, Pablo ; Charlier, Jean-Christopher; Palacios, J. J.; Roche, Stephan
Issue Date2011
PublisherAmerican Physical Society
CitationPhysical Review Letters 107(1): 016602 (2011)
AbstractSpin-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.
Description4 páginas, 4 figuras.-- PACS numbers: 72.80.Vp, 73.20.Hb, 85.75.-d
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.107.016602
URIhttp://hdl.handle.net/10261/44576
DOI10.1103/PhysRevLett.107.016602
ISSN0031-9007
E-ISSN1079-7114
Appears in Collections:(CIN2) Artículos
(ICMM) Artículos
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