Proximity effects induced in graphene by magnetic insulators: First-principles calculations on spin filtering and exchange-splitting gaps

H. X. Yang, A. Hallal, D. Terrade, X. Waintal, S. Roche, M. Chshiev

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    186 Citations (Scopus)

    Abstract

    We report on first-principles calculations of spin-dependent properties in graphene induced by its interaction with a nearby magnetic insulator (europium oxide, EuO). The magnetic proximity effect results in spin polarization of graphene π orbitals by up to 24%, together with a large exchange-splitting band gap of about 36 meV. The position of the Dirac cone is further shown to depend strongly on the graphene-EuO interlayer. These findings point toward the possible engineering of spin gating by the proximity effect at a relatively high temperature, which stands as a hallmark for future all-spin information processing technologies. © 2013 American Physical Society.
    Original languageEnglish
    Article number046603
    JournalPhysical Review Letters
    Volume110
    Issue number4
    DOIs
    Publication statusPublished - 24 Jan 2013

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