Spin lifetimes and strain-controlled spin precession of drifting electrons in 
GaAs

Beck, M.; Metzner, C.; Malzer, S.; Doehler, G. H.

doi:10.1209/epl/i2006-10151-4

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Spin lifetimes and strain-controlled spin precession of drifting electrons in GaAs

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Malzer, S.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Doehler, G. H.
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Beck, M., Metzner, C., Malzer, S., & Doehler, G. H. (2006). Spin lifetimes and strain-controlled spin precession of drifting electrons in GaAs. EUROPHYSICS LETTERS, 75(4), 597-603. doi:10.1209/epl/i2006-10151-4.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6D88-F

Abstract

We study the transport of spin-polarized electrons in n-GaAs using spatially resolved continuous-wave Faraday rotation. From the measured steady-state distribution, we determine spin relaxation times under drift conditions and, in the presence of strain, the induced spin splitting from the observed spin precession. Controlled variation of strain along [110] allows us to deduce the deformation potential causing this effect, while strain along [100] has no effect. The electric-field dependence of the spin lifetime is explained quantitatively in terms of an increase of the electron temperature.