Gate-Tunable Spin-Charge Conversion and the Role of Spin-Orbit Interaction in Graphene

S. Dushenko, H. Ago, K. Kawahara, T. Tsuda, S. Kuwabata, T. Takenobu, T. Shinjo, Y. Ando, M. Shiraishi

    Research output: Contribution to journalArticle

    32 Citations (Scopus)

    Abstract

    The small spin-orbit interaction of carbon atoms in graphene promises a long spin diffusion length and the potential to create a spin field-effect transistor. However, for this reason, graphene was largely overlooked as a possible spin-charge conversion material. We report electric gate tuning of the spin-charge conversion voltage signal in single-layer graphene. Using spin pumping from an yttrium iron garnet ferrimagnetic insulator and ionic liquid top gate, we determined that the inverse spin Hall effect is the dominant spin-charge conversion mechanism in single-layer graphene. From the gate dependence of the electromotive force we showed the dominance of the intrinsic over Rashba spin-orbit interaction, a long-standing question in graphene research.

    Original languageEnglish
    Article number166102
    JournalPhysical Review Letters
    Volume116
    Issue number16
    DOIs
    Publication statusPublished - Apr 21 2016

    Fingerprint

    spin-orbit interactions
    graphene
    electromotive forces
    yttrium-iron garnet
    diffusion length
    Hall effect
    pumping
    field effect transistors
    tuning
    insulators
    carbon
    electric potential
    liquids
    atoms

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

    Cite this

    Dushenko, S., Ago, H., Kawahara, K., Tsuda, T., Kuwabata, S., Takenobu, T., ... Shiraishi, M. (2016). Gate-Tunable Spin-Charge Conversion and the Role of Spin-Orbit Interaction in Graphene. Physical Review Letters, 116(16), [166102]. https://doi.org/10.1103/PhysRevLett.116.166102

    Gate-Tunable Spin-Charge Conversion and the Role of Spin-Orbit Interaction in Graphene. / Dushenko, S.; Ago, H.; Kawahara, K.; Tsuda, T.; Kuwabata, S.; Takenobu, T.; Shinjo, T.; Ando, Y.; Shiraishi, M.

    In: Physical Review Letters, Vol. 116, No. 16, 166102, 21.04.2016.

    Research output: Contribution to journalArticle

    Dushenko, S, Ago, H, Kawahara, K, Tsuda, T, Kuwabata, S, Takenobu, T, Shinjo, T, Ando, Y & Shiraishi, M 2016, 'Gate-Tunable Spin-Charge Conversion and the Role of Spin-Orbit Interaction in Graphene', Physical Review Letters, vol. 116, no. 16, 166102. https://doi.org/10.1103/PhysRevLett.116.166102
    Dushenko, S. ; Ago, H. ; Kawahara, K. ; Tsuda, T. ; Kuwabata, S. ; Takenobu, T. ; Shinjo, T. ; Ando, Y. ; Shiraishi, M. / Gate-Tunable Spin-Charge Conversion and the Role of Spin-Orbit Interaction in Graphene. In: Physical Review Letters. 2016 ; Vol. 116, No. 16.
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