Details

Autor(en) / Beteiligte

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

Titel

Magnetoresistance and magnetic ordering fingerprints in hydrogenated graphene

Ist Teil von

• Physical review letters, 2011-07, Vol.107 (1), p.016602-016602, Article 016602

Ort / Verlag

United States

Erscheinungsjahr

2011

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• 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.