Fig. 8
Quasiparticle-mediated large spin Hall effect in a superconductor. a Schematic of spin Hall measurement on a Cu nonlocal spin valve device. The pure spin current (JS) is absorbed at NbN/Cu interface and then converted to quasiparticle charge current (JQ) via inverse spin Hall effect. b Comparison of current dependence of quasiparticle-mediated spin Hall effect at T = 3 K and normal spin Hall effect at T = 20 K. c Spatial decay profile of the voltage generated by the inverse spin Hall effect. λQ is the quasiparticle charge imbalance length, and d1 and d2 are distances between the voltage probes and the NbN/Cu junction. d Inverse spin Hall resistance as a function of magnetic field from the samples with distance of d1 = 400 nm (red) and d2 = 10 µm (green) at T = 3 K. (a–d adapted from ref. 122 with permission, copyright Springer Nature 2015)
