Abstract
AbstractThe geometry of the sample is shown to dictate the importance of strain on the spin‐orbit splitting of the conduction band for electrons transported via dynamic quantum dots (DQDs) generated by surface acoustic waves (SAWs). Photoluminescence measurements monitoring the Larmor precession of electron spins in the absence of an applied magnetic field are used to characterize the spin‐orbit splitting of the conduction band. We show that, in thick quantum wells (QWs), the Dresselhaus spin‐orbit contribution to the precession frequency reduces and may become comparable to the one associated with the strain field induced by the SAW. We attribute deviations in the measured precession frequency to strain effects, which become more pronounced for QWs located closer to the surface because of the larger SAW strain field. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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