Efficient organometallic spin filter between single-wall carbon nanotube or graphene electrodes

Mohammad Koleini, Magnus Paulsson, Mads Brandbyge

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    Abstract

    We present a theoretical study of spin transport in a class of molecular systems consisting of an organometallic benzene-vanadium cluster placed in between graphene or single-wall carbon-nanotube-model contacts. Ab initio modeling is performed by combining spin density functional theory and nonequilibrium Green's function techniques. We consider weak and strong cluster-contact bonds. Depending on the bonding we find from 73% (strong bonds) up to 99% (weak bonds) spin polarization of the electron transmission, and enhanced polarization with increased cluster length.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume98
    Issue number19
    Pages (from-to)197202
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2007

    Bibliographical note

    Copyright 2007 American Physical Society

    Keywords

    • MAGNETISM
    • SANDWICH CLUSTERS
    • MOLECULAR SPINTRONICS
    • COHERENT TRANSPORT
    • CHAIN

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