Diffusion and transport of spin pulses in an $n$-type semiconductor quantum well

Abstract

We perform a theoretical investigation on the time evolution of spin pulses in an $n$-type GaAs (001) quantum well with and without external electric field at high temperatures by constructing and numerically solving the kinetic spin Bloch equations and the Poisson equation, with the electron-phonon, electron-impurity and electron-electron Coulomb scattering explicitly included. The effect of the Coulomb scattering, especially the effect of the Coulomb drag on the spin diffusion/transport is investigated and it is shown that the spin oscillations and spin polarization reverse along the direction of spin diffusion in the absence of the applied magnetic field, which were originally predicted in the absence of the Coulomb scattering by Weng and Wu [J. Appl. Phys. {\bf 93}, 410 (2003)], can sustain the Coulomb scattering at high temperatures ($\sim 200$ K). The results obtained are consistent with a recent experiment in bulk GaAs but at a very low temperature (4 K) by Crooker and Smith [Phys. Rev. Lett. {\bf 94}, 236601 (2005)].

arXiv comment5 pages, 4 figures in eps format, to be published in J. Appl. Phys

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Cited by in corpus (13)

• Spin dynamics in semiconductors
• Spin relaxation in $n$-type GaAs quantum wells from a full microscopic approach
• Hole spin dephasing in $p$-type semiconductor quantum wells
• Spin relaxation under identical Dresselhaus and Rashba coupling strengths in GaAs quantum wells
• Spin diffusion/transport in $n$-type GaAs quantum wells
• Spin relaxation in $n$-type GaAs quantum wells with transient spin grating
• Spontaneous Emergence of Persistent Spin Helix from Homogeneous Spin Polarization
• Kinetics of spin coherence of electrons in $n$-type InAs quantum wells under intense terahertz laser fields
• Spin relaxation time, spin dephasing time and ensemble spin dephasing time in $n$-type GaAs quantum wells
• Radial Spin Helix in Two-Dimensional Electron Systems with Rashba Spin-Orbit Coupling
• Ambipolar spin transport in (111) GaAs quantum wells
• Voltage controlled spin precession in InAs quantum wells
• Microscopic theory for the Doppler velocimetry of spin propagation in semiconductor quantum wells