Observation of intrinsic inverse spin Hall effect

Abstract

We report observation of intrinsic inverse spin Hall effect in un-doped GaAs multiple quantum wells with a sample temperature of 10 K. A transient ballistic pure spin current is injected by a pair of laser pulses through quantum interference. By time-resolving the dynamics of the pure spin current, the momentum relaxation time is deduced, which sets the lower limit of the scattering time between electrons and holes. The transverse charge current generated by the pure spin current via the inverse spin Hall effect is simultaneously resolved. We find that the charge current is generated well before the first electron-hole scattering event. Generation of the transverse current in the scattering-free ballistic transport regime provides unambiguous evidence for the intrinsic inverse spin Hall effect.

4 pages, 3 figures

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• Dynamical spin Hall conductivity in a magnetic disordered system
• Measurements of the magnetic properties of conduction electrons
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• Current-induced magnetization dynamics at the edge of a two-dimensional electron system with strong spin-orbit coupling
• The momentum-resolved and time-resolved two-color optical coherence absorption spectrum in the scattering process
• Nonuniversality of the intrinsic inverse spin-Hall effect in diffusive systems
• Edelstein Effect in Isotropic and Anisotropic Rashba Models
• Predicted signatures of the intrinsic spin Hall effect in closed systems
• Local spin polarisation of electrons in Rashba semiconductor nanowires: effects of the bound state
• The spin Hall effect
• Enhanced spin Hall effect in strong magnetic disorder
• Trembling motion of electrons driven by Larmor spin precession
• Many-body correction to the intrinsic anomalous and spin Hall conductivities