Spin-controlled superconductivity and tunable triplet correlations in graphene nanostructures

Klaus Halterman, Oriol T. Valls, Mohammad Alidoust

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43 Scopus citations

Abstract

We study graphene ferromagnet/superconductor/ferromagnet (F/S/F) nanostructures via a microscopic self-consistent Dirac Bogoliubov-de Gennes formalism. We show that as a result of proximity effects, experimentally accessible spin switching phenomena can occur as one tunes the Fermi level μF of the F regions or varies the angle θ between exchange field orientations. Superconductivity can then be switched on and off by varying either θ or μF (a spin-controlled superconducting graphene switch). The induced equal-spin triplet correlations in S can be controlled by tuning μF, effectively making a graphene based two-dimensional spin-triplet valve.

Original languageEnglish (US)
Article number046602
JournalPhysical Review Letters
Volume111
Issue number4
DOIs
StatePublished - Jul 22 2013

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