Summary
We report on the biexciton formation of the pseudodirect exciton consisting of the AlAs-X z electron and the GaAs-Γ heavy hole in (GaAs) m /(AlAs) m type-II superlattices withm=10, 12, and 13 monolayers. The photoluminescence lineshape of the pseudodirect exciton exhibits a doublet feature having an energy separation of ∼3 meV at the excitation power of the order of mW/cm2 in all the samples, and the low-energy band grows superlinearly. The transient profiles of the doublet photoluminescence band early indicate the biexciton formation: the delay of the rise of the biexciton photoluminescence on the low-energy side and its shorter decay time in comparison with the exciton photoluminescence.
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Miller R. C., Kleinman D. A., Gossard A. C. andMunteanu O.,Phys. Rev. B,25 (1982) 6542.
Kleinman D. A.,Phys. Rev. B,28 (1983) 871.
Charbonneau S., Steiner T., Thewalt M. L., Koteles E. S., Chi J. Y. andElman B.,Phys. Rev. B,38 (1988) 3583.
Banyai L., Galbraith I. andHaug H.,Phys. Rev. B,38 (1988) 3931.
Cingolani R., Chen Y. andPloog K.,Phys. Rev. B,38 (1988) 13487.
Feuerbacher B. F., Kuhl J. andPloog K.,Phys. Rev. B,43 (1991) 2439.
Phillips R. T., Lovering D. J., Denton G. J. andSmith G. W.,Phys. Rev. B,45 (1992) 4308.
Pantke K.-H., Oberhauser D., Lyssenko V. G., Hvam J. M. andWeimann G.,Phys. Rev. B,47 (1993) 2413.
Kim J. C., Wake D. R. andWolfe J. P.,Phys. Rev. B,50 (1994) 15099.
Sham L. J. andLu Y. T.,J. Lumin.,44 (1989) 207, and references therein.
Nakayama M., Imazawa K., Suyama K., Tanaka I. andNishimura H.,Phys. Rev. B,49 (1994) 13564, and references therein.
Nakayama M., Suyama K. andNishimura H.,Phys. Rev. B,51 (1995) 7870.
Zimmermann R. andBimberg D.,Phys. Rev. B,47 (1993) 15789.
Gourley P. L. andWolfe J. P.,Phys. Rev. B,20 (1979) 3319.
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Nakayama, M., Suyama, K. & Nishimura, H. Pseudodirect biexcitons in GaAs/AlAs type-II superlattices. Il Nuovo Cimento D 17, 1629–1633 (1995). https://doi.org/10.1007/BF02457255
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DOI: https://doi.org/10.1007/BF02457255