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Spin-to-charge conversion using Rashba coupling at the interface between non-magnetic materials

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  • J. C. Rojas Sánchez

    (Institut Nanosciences et Cryogénie, CEA
    Université Joseph Fourier)

  • L. Vila

    (Institut Nanosciences et Cryogénie, CEA
    Université Joseph Fourier)

  • G. Desfonds

    (Institut Nanosciences et Cryogénie, CEA
    Université Joseph Fourier)

  • S. Gambarelli

    (Institut Nanosciences et Cryogénie, CEA
    Université Joseph Fourier)

  • J. P. Attané

    (Institut Nanosciences et Cryogénie, CEA
    Université Joseph Fourier)

  • J. M. De Teresa

    (Instituto de Ciencia de Materiales de Aragón (ICMA), Universidad de Zaragoza-CSIC, Facultad de Ciencias
    Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza)

  • C. Magén

    (Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza
    Fundación ARAID)

  • A. Fert

    (Unité Mixte de Physique CNRS/Thalès, Campus Polytechnique
    Université Paris-Sud)

Abstract

The Rashba effect is an interaction between the spin and the momentum of electrons induced by the spin-orbit coupling (SOC) in surface or interface states. Its potential for conversion between charge and spin currents has been theoretically predicted but never clearly demonstrated for surfaces or interfaces of metals. Here we present experiments evidencing a large spin-charge conversion by the Bi/Ag Rashba interface. We use spin pumping to inject a spin current from a NiFe layer into a Bi/Ag bilayer and we detect the resulting charge current. As the charge signal is much smaller (negligible) with only Bi (only Ag), the spin-to-charge conversion can be unambiguously ascribed to the Rashba coupling at the Bi/Ag interface. This result demonstrates that the Rashba effect at interfaces can be used for efficient charge-spin conversion in spintronics.

Suggested Citation

  • J. C. Rojas Sánchez & L. Vila & G. Desfonds & S. Gambarelli & J. P. Attané & J. M. De Teresa & C. Magén & A. Fert, 2013. "Spin-to-charge conversion using Rashba coupling at the interface between non-magnetic materials," Nature Communications, Nature, vol. 4(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3944
    DOI: 10.1038/ncomms3944
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    Cited by:

    1. Geoffroy Kremer & Julian Maklar & Laurent Nicolaï & Christopher W. Nicholson & Changming Yue & Caio Silva & Philipp Werner & J. Hugo Dil & Juraj Krempaský & Gunther Springholz & Ralph Ernstorfer & Jan, 2022. "Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric α-GeTe(111)," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    2. Wibson W. G. Silva & José Holanda, 2023. "One analytical approach of Rashba–Edelstein magnetoresistance in 2D materials," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 96(4), pages 1-7, April.
    3. Sara Varotto & Annika Johansson & Börge Göbel & Luis M. Vicente-Arche & Srijani Mallik & Julien Bréhin & Raphaël Salazar & François Bertran & Patrick Le Fèvre & Nicolas Bergeal & Julien Rault & Ingrid, 2022. "Direct visualization of Rashba-split bands and spin/orbital-charge interconversion at KTaO3 interfaces," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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