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Spin-flip rate of excitonic magnetic polarons in Cd1−xMnxTe/Cd1−yMgyTe quantum wells
- Source :
- Journal of Applied Physics. 87:6457-6459
- Publication Year :
- 2000
- Publisher :
- AIP Publishing, 2000.
-
Abstract
- The lifetime of excitons in Cd1−xMnxTe/Cd1−yMgyTe single quantum wells was investigated by time-resolved photoluminescence spectroscopy. Spin-flips between dark and bright excitons remarkably change the excitonic lifetime yielding a two-exponential decay in the photoluminescence intensity. The temperature dependence of the two decay times shows that the spin-flip rate depends strongly on the formation of excitonic magnetic polarons. By forming polarons, the spin-flip rate from dark excitons to bright excitons is reduced effectively by the spin- barriers of the polarized Mn ions, which extends significantly the luminescence decay time.
- Subjects :
- Condensed Matter::Quantum Gases
Physics
Photoluminescence
Condensed matter physics
Condensed Matter::Other
Exciton
General Physics and Astronomy
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Polaron
Condensed Matter::Materials Science
Condensed Matter::Strongly Correlated Electrons
Spin-flip
Luminescence
Spectroscopy
Quantum well
Spin-½
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 87
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........834b8b16bbe8c296d4b964e3577a26e4
- Full Text :
- https://doi.org/10.1063/1.372737