Magnon Spin Current Induced by Triplet Cooper Pair Supercurrents

ORAL

Abstract

At the interface between a ferromagnetic insulator and a superconductor there is a coupling between the spins of the two materials. We show that when a supercurrent carried by triplet Cooper pairs flows through the superconductor, the coupling induces a magnon spin current in the adjacent ferromagnetic insulator. The effect is dominated by Cooper pairs polarized in the same direction as the ferromagnetic insulator, so that charge and spin supercurrents produce similar results. Our findings demonstrate a way of converting Cooper pair supercurrents to magnon spin currents.

*This work was supported by the Research Council of Norway through its Centres of Excellence funding scheme, Project No. 262633 "QuSpin."

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Publication: Lina G. Johnsen, Haakon T. Simensen, Arne Brataas, and Jacob Linder, Phys. Rev. Lett. 127, 207001 (2021).

Presenters

  • Lina G Johnsen

    • Norwegian University of Science and Technology

Authors

  • Lina G Johnsen

    • Norwegian University of Science and Technology

  • Haakon T Simensen

    • Norwegian University of Science and Technology

  • Arne Brataas

    • Norwegian Univ Tech (NTNU)

  • Jacob Linder

    • Norwegian University of Science and Technology