Hyperfine interactions in graphene and related carbon nanostructures |
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Authors: | Yazyev Oleg V |
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Affiliation: | Ecole Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering and Institute of Theoretical Physics, CH-1015 Lausanne, Switzerland. oleg.yazyev@epfl.ch |
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Abstract: | Hyperfine interactions, magnetic interactions between the spins of electrons and nuclei, in graphene and related carbon nanostructures are studied. By using a combination of accurate first principles calculations on graphene fragments and statistical analysis, I show that both isotropic and dipolar hyperfine interactions in sp2 carbon nanostructures can be accurately described in terms of the local electron spin distribution and atomic structure. A complete set of parameters describing the hyperfine interactions of 13C and other nuclear spins at substitution impurities and edge terminations is determined. These results permit the design of graphene-based nanostructures allowing for longer electron spin coherence times which are required by spintronics and quantum information processing applications. Practical recipes for minimizing hyperfine interactions in carbon nanostructures are given. |
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