Magnon spin current induced by triplet Cooper pair supercurrents
arXiv:2105.05861 · doi:10.1103/PhysRevLett.127.207001
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.
8 pages, 2 figures
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- Magnon-Cooparons in magnet-superconductor hybrids
- Spin-pumping from a ferromagnetic insulator to an unconventional superconductor with interfacial Andreev bound-states
- Generation of polarized spin-triplet Cooper pairings by magnetic barriers in superconducting junctions
- Cavity-mediated superconductor$\unicode{x2013}$ferromagnetic insulator coupling
- Renormalization of antiferromagnetic magnons by superconducting condensate and quasiparticles
- Anisotropic spin-current spectroscopy of ferromagnetic superconducting gap symmetries