Stable ferromagnetism and doping-induced half-metallicity in asymmetric graphene nanoribbons

We propose a class of graphene nanoribbons showing strong intrinsic ferromagnetic behavior due to their asymmetry. Such ribbons are based on a zigzag-edged backbone surmounted by a periodic, triangular notched region of variable size. The electronic properties as a function of the topology are inves...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2012-06, Vol.85 (24), Article 245405
Main Authors: Adams, Donat J., Gröning, Oliver, Pignedoli, Carlo A., Ruffieux, Pascal, Fasel, Roman, Passerone, Daniele
Format: Article
Language:English
Subjects:
Asymmetry
Band structure of solids
Condensed matter
Doping
Ferromagnetism
Graphene
Nanostructure
Strategy
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Summary:We propose a class of graphene nanoribbons showing strong intrinsic ferromagnetic behavior due to their asymmetry. Such ribbons are based on a zigzag-edged backbone surmounted by a periodic, triangular notched region of variable size. The electronic properties as a function of the topology are investigated. Interestingly, substitutional doping by boron or nitrogen induces half-metallicity. The most effective doping sites can be inferred from the band structure. Given the present rapid development of bottom-up strategies for the synthesis of atomically precise carbon nanostructures the proposed class of nanoribbons emerges as a real candidate for spintronic applications at ambient temperature.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.85.245405