Graphite and graphene as perfect spin filters

Volodymyr Karpan, G. Giovannetti, Petr Khomyakov, M. Talanana, A.A. Starikov, M. Zwierzycki, J. van den Brink, G. Brocks, Paul J. Kelly

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Abstract

Based upon the observations (i) that their in-plane lattice constants match almost perfectly and (ii) that their electronic structures overlap in reciprocal space for one spin direction only, we predict perfect spin filtering for interfaces between graphite and (111) fcc or (0001) hcp Ni or Co. The spin filtering is quite insensitive to roughness and disorder. The formation of a chemical bond between graphite and the open d-shell transition metals that might complicate or even prevent spin injection into a single graphene sheet can be simply prevented by dusting Ni or Co with one or a few monolayers of Cu while still preserving the ideal spin-injection property.
Original languageUndefined
Pages (from-to)176602-1-176602-4
Number of pages4
JournalPhysical review letters
Volume99
Issue number17
DOIs
Publication statusPublished - 2007

Keywords

  • METIS-241489
  • IR-58416

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