Spin Hall effect generated by fluctuating vortices in type-II superconductors

Takuya Taira, Yusuke Kato, Masanori Ichioka, Hiroto Adachi

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    1 Citation (Scopus)

    Abstract

    We theoretically investigate the vortex spin Hall effect, i.e., a novel spin Hall effect driven by the motion of superconducting vortices, by focusing on the role of superconducting fluctuations. Within the BCS-Gor'kov microscopic approach combined with the Kubo formula, we find a strong similarity between the vortex spin Hall effect and the vortex Nernst/Ettingshausen effect. Calculated temperature dependence of the voltage signal due to the inverse vortex spin Hall effect exhibits a strong enhancement by vortex fluctuations. This result not only provides a possible explanation for a prominent peak found in the spin Seebeck effect in a NbN/Y3Fe5O12 system but also leads to a proposal of new experiments using other superconductors with strong fluctuations, such as cuprate or iron-based superconductors.

    Original languageEnglish
    Article number134417
    JournalPhysical Review B
    Volume103
    Issue number13
    DOIs
    Publication statusPublished - Apr 12 2021

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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