Spin-pumping from a ferromagnetic insulator to an unconventional superconductor with interfacial Andreev bound-states
arXiv:2212.08091 · doi:10.1103/PhysRevB.107.144504
Abstract
Spin-pumping from a ferromagnetic insulator into a high- superconductor with a -wave superconducting order parameter has recently been experimentally observed. Such unconventional superconducting order is known to produce interfacial bound-states for certain crystallographic orientations. Here, we present a methodology which can be used to study spin-pumping into unconventional superconductors, including the role of interfacial bound-states. As an example, we determine how the crystallographic orientation of the -wave order parameter relative the interface changes the spin-pumping effect. We find that the spin-pumping effect is slightly enhanced at low temperatures for orientations hosting interfacial bound-states compared to other superconducting states. However, the spin-pumping effect does not show a coherence peak close to for such orientations, and instead remains smaller than the normal state value for all . For orientations not hosting interfacial bound-states, we find that the pumped spin current can be increased to several times the normal-state spin current at frequencies that are small compared to the superconducting gap. Our results show that the spin-pumping dependency on frequency and temperature changes qualitatively depending on the crystallographic orientation of unconventional superconducting order parameters relative the interface.
arXiv comment12 pages, 4 figures
References in corpus (24)
- Spintronics: Fundamentals and applications
- Enhanced Gilbert Damping in Thin Ferromagnetic Films
- Spin Transfer Torques
- Nonlocal magnetization dynamics in ferromagnetic heterostructures
- Spin pumping and spin-transfer torques in antiferromagnets
- Subterahertz spin pumping from an insulating antiferromagnet
- Spin current in ferromagnet/insulator/superconductor junctions
- Topological spin-current in non-centrosymmetric superconductors
- Spin dynamics in a superconductor / ferromagnet proximity system
- Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
- Spin pumping into superconductors: A new probe of spin dynamics in a superconducting thin film
- Probe of Spin Dynamics in Superconducting NbN Thin Films via Spin Pumping
- Interplay between ferromagnetism and superconductivity in tunneling currents
- Proximity effect-assisted absorption of spin currents in superconductors
- Spontaneous spin current due to triplet superconductor--ferromagnet interfaces
- Magnon spin current induced by triplet Cooper pair supercurrents
- Spin and Charge Josephson effects between non-uniform superconductors with coexisting helimagnetic order
- Spin-current coherence peak in superconductor/magnet junctions
- Anisotropic superconducting spin transport at magnetic interfaces
- Adiabatic and nonadiabatic spin torques induced by spin-triplet supercurrent
- Ferromagnetic resonance modulation in -wave superconductor/ferromagnetic insulator bilayer systems
- Superconductivity-enhanced spin pumping: Role of Andreev resonances
- Spin pumping in d-wave superconductor/ferromagnet hybrids
- Spin-pumping in superconductor-antiferromagnetic insulator bilayers