期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.016602
关键词
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资金
- MICINN [FIS2010-21883-C02-02, CSD2007-00010, FIS2009-12721-C04-01, CSD2007-00050]
- Universidad de Alicante
- J. Fernandez-Rossier
- Belgian Program on Interuniversity Attraction Poles [PAI6]
- ARC
- ETSF [211956]
- Belgium FNRS
- ICREA Funding Source: Custom
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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