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Stimulated Scattering of Indirect Excitons in Coupled Quantum Wells: Signature of a Degenerate Bose-Gas of Excitons
Open accessAbstract
We observe and analyze strongly nonlinear photoluminescence kinetics of indirect excitons in GaAs/AlGaAs coupled quantum wells at low bath temperatures, > or = 50 mK. The long recombination lifetime of indirect excitons promotes accumulation of these Bose particles in the lowest energy states and allows the photoexcited excitons to cool down to temperatures where the dilute 2D gas of indirect excitons becomes statistically degenerate. Our main result--a strong enhancement of the exciton scattering rate to the low-energy states with increasing concentration of the indirect excitons--reveals bosonic stimulation of exciton scattering, which is a signature of a degenerate Bose-gas of excitons.
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Cites
Bose condensation of strongly excited longitudinal electric modes
Fröhlich, H. (1968) · Physics Letters A · doi:10.1016/0375-9601(68)90242-9 · Cited by 273
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McKemmish, L. K., Reimers, J. R., McKenzie, R. H., Mark, A. E., & Hush, N. S. (2009) · Physical Review E · doi:10.1103/physreve.80.021912 · Cited by 87
Metadata
- Authors
- Butov, L. V., Ivanov, A. L., Imamoglu, A., Littlewood, P. B., Shashkin, A. A., Dolgopolov, V. T., Campman, K. L., & Gossard, A. C.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2001-06-11
- Volume
- 86
- Issue
- 24
- Pages
- 5608-5611
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2019489395
- Cited by
- 246
- References
- 1
- FWCI
- 10.61
- Type
- journal article
- Language
- en
- Open access
- green
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- The paper
- Butov, L. V., Ivanov, A. L., Imamoglu, A., Littlewood, P. B., Shashkin, A. A., Dolgopolov, V. T., Campman, K. L., & Gossard, A. C. (2001). Stimulated Scattering of Indirect Excitons in Coupled Quantum Wells: Signature of a Degenerate Bose-Gas of Excitons. Physical Review Letters. https://doi.org/10.1103/physrevlett.86.5608
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