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Spin exchange interaction with tunable range between graphene quantum dots

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2010

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Braun, Matthias

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http://nbn-resolving.de/urn:nbn:de:bsz:352-248106
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http://arxiv.org/abs/1011.2966

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We study the spin exchange between two electrons localized in separate quantum dots in graphene. The electronic states in the conduction band are coupled indirectly by tunneling to a common continuum of delocalized states in the valence band. As a model, we use a two-impurity Anderson Hamiltonian which we subsequently transform into an effective spin Hamiltonian by way of a two-stage Schrieffer-Wolff transformation. We then compare our result to that from a Coqblin-Schrieffer approach as well as to fourth order perturbation theory.

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530 Physik

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ISO 690BRAUN, Matthias, Philipp STRUCK, Guido BURKARD, 2010. Spin exchange interaction with tunable range between graphene quantum dots
BibTex
@unpublished{Braun2010excha-24810,
  year={2010},
  title={Spin exchange interaction with tunable range between graphene quantum dots},
  author={Braun, Matthias and Struck, Philipp and Burkard, Guido}
}
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