Collective Spin-Hall Effect for Electron-Hole Gratings

Abstract

We show that an electric field parallel to the wavefronts of an electron-hole grating in a GaAs quantum well generates, via the electronic spin Hall effect, a spin grating of the same wave vector and with an amplitude that can exceed 1% of the amplitude of the initial density grating. We refer to this phenomenon as "collective spin Hall effect". A detailed study of the coupled-spin charge dynamics for quantum wells grown in different directions reveals rich features in the time evolution of the induced spin density, including the possibility of generating a helical spin grating.

8 pages, 3 figures

References in corpus (11)

• Dissipationless Quantum Spin Current at Room Temperature
• An Exact SU(2) Symmetry and Persistent Spin Helix in a Spin-Orbit Coupled System
• Spin current and polarization in impure 2D electron systems with spin-orbit coupling
• Direct mapping of the formation of a persistent spin helix: Supplementary information
• Non-diffusive spin dynamics in a two-dimensional electron gas
• Doppler velocimetry of spin propagation in a two-dimensional electron gas
• Duality of the spin and density dynamics for two-dimensional electrons with a spin-orbit coupling
• Spin relaxation in $n$-type GaAs quantum wells with transient spin grating
• Ultrafast extrinsic spin-Hall currents
• Spontaneous Emergence of Persistent Spin Helix from Homogeneous Spin Polarization
• Kinetic investigation on extrinsic spin Hall effect induced by skew scattering

Cited by in corpus (3)

• Persistent Skyrmion Lattice of Noninteracting Electrons with Spin-Orbit Coupling
• Theory of coupled spin-charge transport due to spin-orbit interaction in inhomogeneous two-dimensional electron liquids
• Ambipolar spin transport in (111) GaAs quantum wells