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arXiv · 1105.1005

Magnetoresistance and Magnetic Ordering Fingerprints in Hydrogenated Graphene

David Soriano·Nicolas Leconte·Pablo Ordejón·Jean-Christophe Charlier·Juan José 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-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 $\sim 7%$ are calculated for hydrogen densities around 0.25%. These theoretical results could serve as guidance for experimental observation of induced magnetism in graphene.

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David Soriano, Nicolas Leconte, Pablo Ordejón, Jean-Christophe Charlier, Juan José Palacios, Stephan Roche. 2011-05-05. Magnetoresistance and Magnetic Ordering Fingerprints in Hydrogenated Graphene. https://doi.org/10.1103/physrevlett.107.016602

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