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Quantum Chemistry
Transport and lifetime enhancement of photoexcited spins in GaAs by surface acoustic waves.
PubMed
Authors: Sogawa T, Santos PV, Zhang SK, Eshlaghi S, Wieck AD, Ploog KH
Year
2001
Paper ID
13177
Status
Peer-reviewed
Abstract Read
~2 min
Abstract Words
84
Citations
N/A
Abstract
We demonstrate spin transport and spin lifetime enhancement in GaAs quantum wells induced by the traveling piezoelectric field of a surface acoustic wave (SAW). Spin transport lengths of about 3 microm corresponding to spin relaxation times during transport over 1 ns are observed, which are considerably longer than the exciton spin diffusion lengths in the absence of a SAW. The slow spin relaxation is attributed to a reduced electron-hole exchange interaction, when the carriers are spatially separated by the lateral potential modulation induced by the SAW.
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- This paper contributes to the Quantum Chemistry research area in the Quantum Articles archive.
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- We demonstrate spin transport and spin lifetime enhancement in GaAs quantum wells induced by the traveling piezoelectric field of a surface acoustic wave (SAW).
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