Magnetoresistance and Magnetic Ordering Fingerprints in Hydrogenated Graphene
(2011) Physical Review Letters — Vol. 107, n° 1, p. 16602 (2011)
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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 similar 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.
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Citations
Soriano, D., Leconte, N., Ordejon, P., Charlier, J.-C., Palacios, J.-J., & Roche, S. (2011). Magnetoresistance and Magnetic Ordering Fingerprints in Hydrogenated Graphene. Physical Review Letters, 107(1), 16602. https://doi.org/10.1103/PhysRevLett.107.016602 (Original work published 2011)