Hyperfine interactions in graphene and related carbon nanostructures.
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.
Yazyev
Oleg V
OV
Ecole Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering and Institute of Theoretical Physics, CH-1015 Lausanne, Switzerland. oleg.yazyev@epfl.ch