Giant transition-state enhancement of quasiparticle spin-Hall effect in an exchange-spin-split superconductor detected by non-local magnon spin-transport
arXiv:2004.09467 · doi:10.1021/acsnano.0c07187
Abstract
Although recent experiments and theories have shown a variety of exotic transport properties of non-equilibrium quasiparticles (QPs) in superconductor (SC)-based devices with either Zeeman or exchange spin-splitting, how QP interplays with magnon spin currents remains elusive. Here, using non-local magnon spin-transport devices where a singlet SC (Nb) on top of a ferrimagnetic insulator (Y3Fe5O12) serves as a magnon spin detector, we demonstrate that the conversion efficiency of magnon spin to QP charge via inverse spin-Hall effect (iSHE) in such an exchange-spin-split SC can be greatly enhanced by up to 3 orders of magnitude compared with that in the normal state, particularly when its interface superconducting gap matches the magnon spin accumulation. Through systematic measurements with varying the current density and SC thickness, we identify that superconducting coherence peaks and exchange spin-splitting of the QP density-of-states, yielding a larger spin excitation while retaining a modest QP charge-imbalance relaxation, are responsible for the giant QP iSHE. The latter exchange-field-modified QP relaxation is experimentally proved by spatially resolved measurements with varying the separation of electrical contacts on the spin-split Nb.
arXiv comment30 pages, 6 figures
References in corpus (29)
- Proximity effects in superconductor-ferromagnet heterostructures
- Superconducting Spintronics
- Long distance transport of magnon spin information in a magnetic insulator at room temperature
- Study of Intrinsic Spin Hall Effect and Orbital Hall Effect in 4d- and 5d- Transition Metals
- Spin-polarized supercurrents for spintronics: a review of current progress
- Indication of intrinsic spin Hall effect in 4d and 5d transition metals
- Magnon spin transport driven by the magnon chemical potential in a magnetic insulator
- Seebeck Effect in Magnetic Tunnel Junctions
- Colloquium: Nonequilibrium effects in superconductors with a spin-splitting field
- Nonlocal Thermoelectric Effects and Nonlocal Onsager Relations in a Three-Terminal Proximity-Coupled Superconductor-Ferromagnet Device
- Observation of thermoelectric currents in high-field superconductor-ferromagnet tunnel junctions
- Electronic Pumping of Quasiequilibrium Bose-Einstein Condensed Magnons
- Spin Imbalance and Spin-Charge Separation in a Mesoscopic Superconductor
- Extremely long quasiparticle spin lifetimes in superconducting aluminium using MgO tunnel spin injectors
- Long-range spin-polarized quasiparticle transport in mesoscopic Al superconductors with a Zeeman splitting
- Spin dynamics in a superconductor / ferromagnet proximity system
- Temperature dependence of the magnon spin diffusion length and magnon spin conductivity in the magnetic insulator yttrium iron garnet
- Influence of yttrium iron garnet thickness and heater opacity on the nonlocal transport of electrically and thermally excited magnons
- Microscopic theory of spin transport at the interface between the superconductor and a ferromagnetic insulator
- Charge imbalance in superconductors in the low-temperature limit
- 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
- Long-range spin and charge accumulation in mesoscopic superconductors with Zeeman splitting
- Proximity effect-assisted absorption of spin currents in superconductors
- Thermally Driven Long Range Magnon Spin Currents in Yttrium Iron Garnet due to Intrinsic Spin Seebeck Effect
- Spin-current coherence peak in superconductor/magnet junctions
- Fundamentals of magnon-based computing
- Supercurrent Induced Charge-Spin Conversion in Spin-Split Superconductors
- Out-of-Equilibrium Spin Transport in Mesoscopic Superconductors
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- Boosting spintronics with superconductivity
- Magnon spin current induced by triplet Cooper pair supercurrents
- Superconductor-ferromagnet hybrids for non-reciprocal electronics and detectors
- Magnon-Cooparons in magnet-superconductor hybrids
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- Magnon currents excited by the spin Seebeck effect in ferromagnetic EuS thin films
- Quasiparticle density of states and triplet correlations in superconductor/ferromagnetic-insulator structures across a sharp domain wall
- Phase biasing of a Josephson junction using Rashba-Edelstein effect
- Magnonic spin Joule heating and rectification effects
- Dynamical Hall responses of disordered superconductors
- Coupling the Higgs mode and ferromagnetic resonance in spin-split superconductors with Rashba spin-orbit coupling
- Spin-split superconductivity in spin-orbit coupled hybrid nanowires with ferromagnetic barriers
- Cryogenic spin Peltier effect detected by a RuO-AlO on-chip microthermometer
- Single-crystalline YIG flakes with uniaxial in-plane anisotropy and diverse crystallographic orientations
- Inverse spin-Hall effect and spin-swapping in spin-split superconductors
- Fluctuation contribution to Spin Hall Effect in Superconductors
- Time-dependent Ginzburg-Landau theory of the vortex spin Hall effect
- Role of two-dimensional Ising superconductivity in the non-equilibrium quasiparticle spin-to-charge conversion efficiency
- Growth optimization of TaN for superconducting spintronics