Spin-filter effect by introducing an edge vacancy on armchair graphene nanoribbons with oxygen termination

Katsuya Yabusaki, Kenji Sasaoka, Kei Noda, Yuji Awano

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    1 Citation (Scopus)

    Abstract

    We studied the spin transport properties of an oxygen-terminated armchair graphene nanoribbon (O-AGNR) with a single edge vacancy via an ab-initio calculation based on density functional theory combined with the nonequilibrium Green's function technique. We found that spin-filtering occurs regardless of the ribbon width by introducing an edge vacancy on one edge side of the O-AGNR because the four energy bands mainly consisted of the oxygen p orbital, such that the up-spin states were localized on one edge side and the down-spin states were on the other edge side. Moreover, we showed that the absolute value of spin-filtering efficiency reached ∼1.00 at certain values of the chemical potential; additionally, the direction of spin polarization can be switched by controlling the chemical potential. These results suggest that O-AGNRs have potential applications in spintronics devices.

    Original languageEnglish
    Article number045001
    JournalJapanese journal of applied physics
    Volume58
    Issue number4
    DOIs
    Publication statusPublished - 2019 Jan 1

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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