Strong spin-filtering and spin-valve effects in a molecular V-C-60-V contact

Mohammad Koleini, Mads Brandbyge

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    Abstract

    Motivated by the recent achievements in the manipulation of C-60 molecules in STM experiments, we study theoretically the structure and electronic properties of a C-60 molecule in an STM tunneljunction with a magnetic tip and magnetic adatom on a Cu(111) surface using first-principles calculations. For the case of a vanadium tip/adatom, we demonstrate how spin coupling between the magnetic V atoms, mediated by the C-60, can be observed in the electronic transport, which display a strong spin-filtering effect, allowing mainly majority-spin electrons to pass (>95%). Moreover, we find a significant change in the conductance between parallel and anti-parallel spin polarizations in the junction (86%) which suggests that STM experiments should be able to characterize the magnetism and spin coupling for these systems.
    Original languageEnglish
    JournalBeilstein Journal of Nanotechnology
    Volume3
    Pages (from-to)589-596
    ISSN2190-4286
    DOIs
    Publication statusPublished - 2012

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