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Nonreciprocal Transport in a Rashba Ferromagnet, Delafossite PdCoO2

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    Nonreciprocal Transport in a Rashba Ferromagnet, Delafossite PdCoO2
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    Nano Letters

    Cite this: Nano Lett. 2021, 21, 20, 8687–8692
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    https://doi.org/10.1021/acs.nanolett.1c02756
    Published October 6, 2021
    Copyright © 2021 American Chemical Society
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    Abstract

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    Rashba interfaces yield efficient spin-charge interconversion and give rise to nonreciprocal transport phenomena. Here, we report magnetotransport experiments in few-nanometer-thick films of PdCoO2, a delafossite oxide known to display a large Rashba splitting and surface ferromagnetism. By analyzing the angle dependence of the first- and second-harmonic longitudinal and transverse resistivities, we identify a Rashba-driven unidirectional magnetoresistance that competes with the anomalous Nernst effect below the Curie point. We estimate a Rashba coefficient of 0.75 ± 0.3 eV Å and argue that our results qualify delafossites as a new family of oxides for nanospintronics and spin–orbitronics, beyond perovskite materials.

    Copyright © 2021 American Chemical Society

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    Cited By

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    This article is cited by 16 publications.

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    Nano Letters

    Cite this: Nano Lett. 2021, 21, 20, 8687–8692
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.nanolett.1c02756
    Published October 6, 2021
    Copyright © 2021 American Chemical Society
    Request reuse permissions

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