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On the Suppression of Electron-Hole Exchange Interaction in a Reservoir of Nonradiative Excitons.
- Source :
-
Semiconductors . Sep2019, Vol. 53 Issue 9, p1170-1174. 5p. - Publication Year :
- 2019
-
Abstract
- Mechanisms of the suppression of the electron-hole exchange interaction in nonradiative excitons with a large in-plane wave vector in high-quality heterostructures with quantum wells are analyzed theoretically. It is shown that the dominant suppression mechanism is exciton-exciton scattering accompanied by the mutual spin flips of like carriers (either two electrons or two holes), comprising the excitons. As a result, the electron spin polarization in nonradiative excitons may be retained for a long time. The analysis of experimental data shows that this relaxation time can exceed one nanosecond. This long-term and optically controllable spin memory in an exciton reservoir may be of interest for future information technologies. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10637826
- Volume :
- 53
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Semiconductors
- Publication Type :
- Academic Journal
- Accession number :
- 138415293
- Full Text :
- https://doi.org/10.1134/S1063782619090239