Probe of Spin Dynamics in Superconducting NbN Thin Films via Spin Pumping

Abstract

The emerging field of superconductor (SC) spintronics has attracted intensive attentions recently. Many fantastic spin dependent properties in SC have been discovered, including the observation of large magnetoresistance, long spin lifetimes and the giant spin Hall effect in SC, as well as spin supercurrent in Josephson junctions, etc. Regarding the spin dynamic in SC films, few studies has been reported yet. Here, we report the investigation of the spin dynamics in an s-wave superconducting NbN film via spin pumping from an adjacent insulating ferromagnet GdN layer. A profound coherence peak of the Gilbert damping is observed slightly below the superconducting critical temperature of the NbN layer, which is consistent with recent theoretical studies. Our results further indicate that spin pumping could be a powerful tool for investigating the spin dynamics in 2D crystalline superconductors.

11 pages, 4 figures, and SI

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Cited by in corpus (39)

• Quantum Materials for Spin and Charge Conversion
• Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
• Boosting spintronics with superconductivity
• Spin transport parameters of NbN thin films characterised by spin pumping experiments
• Giant transition-state enhancement of quasiparticle spin-Hall effect in an exchange-spin-split superconductor detected by non-local magnon spin-transport
• Finite-frequency spin susceptibility and spin pumping in superconductors with spin-orbit relaxation
• Temperature-dependent spin-transport and current-induced torques in superconductor/ferromagnet heterostructures
• Large enhancement of spin pumping due to the surface bound states in normal metal/superconductor structures
• Magnon spin current induced by triplet Cooper pair supercurrents
• Anomalous Gilbert Damping and Duffing Features of the SFS {\boldmath ${\phi }_0$} Josephson Junction
• Anisotropic superconducting spin transport at magnetic interfaces
• Dynamics of two ferromagnetic insulators coupled by superconducting spin current
• Thermally induced spin-transfer torques in superconductor/ferromagnet bilayers
• Spin pumping between noncollinear ferromagnetic insulators through thin superconductors
• Ferromagnetic resonance modulation in $d$-wave superconductor/ferromagnetic insulator bilayer systems
• Flux flow spin Hall effect in type-II superconductors with spin-splitting field
• Magnon-Cooparons in magnet-superconductor hybrids
• Spin-pumping from a ferromagnetic insulator to an unconventional superconductor with interfacial Andreev bound-states
• Superconductivity-enhanced spin pumping: Role of Andreev resonances
• Spin diffusion equation in superconductors in the vicinity of Tc
• Spin pumping in d-wave superconductor/ferromagnet hybrids
• Non-linear spin torque, pumping and cooling in superconductor/ferromagnet systems
• Spin-pumping in superconductor-antiferromagnetic insulator bilayers
• Room temperature spin-orbit torque efficiency in sputtered low-temperature superconductor delta-TaN
• Magnetic eigenmodes in chains of coupled phi0-Josephson junctions with ferromagnetic weak links
• Renormalization of antiferromagnetic magnons by superconducting condensate and quasiparticles
• Spin current injection at magnetic insulator/superconductor interfaces
• Spin Hall effect generated by fluctuating vortices in type-II superconductors
• Magnon influence on the superconducting density of states in superconductor$-$ferromagnetic-insulator bilayers
• Anisotropic spin-current spectroscopy of ferromagnetic superconducting gap symmetries
• Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface
• Spin Pumping into two-dimensional systems
• Cryogenic spin Peltier effect detected by a RuO${}_2$-AlO${}_x$ on-chip microthermometer
• Spin pumping into a spin glass material
• Time-dependent Ginzburg-Landau theory of the vortex spin Hall effect
• Spin transport through a nanojunction with a precessing anisotropic molecular spin: Quantum interference and spin-transfer torque
• Interfacial control of vortex-limited critical current in type II superconductor films
• Quantum-size effect induced Andreev bound states in ultrathin metallic islands proximitized by a superconductor
• Giant oscillatory Gilbert damping in superconductor/ferromagnet/superconductor junctions