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

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

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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.
Original languageEnglish
Pages (from-to)597-603
JournalEurophysics letters
Volume75
Issue number4
DOIs
Publication statusPublished - Aug 2006
Externally publishedYes

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