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Abstracts
A theoretical analysis was carried out of an optical transition observed in high-quality GaAs/AlGaAs heterostructures δ-doped with shallow acceptors. The transition involves a 2D electron and a 3D acceptor-localized hole. The wave functions of a bulk Be acceptor were calculated within the spherical model with both the s-like and d-like parts of the envelope taken into account. The electron envelope wave functions resulted from self-consistent calculations of the electrostatic potential and were dependent on the 2D electron concentration, n_s. We show that: (i) including the d-like part of the acceptor envelope relaxes the selection rules of free-to-bound transitions at k=0;(ii) in the magnetic field, the selection rules depend on the number of the electron Landau level;(iii) the ratio of the intensity of the strongest transitions in both circular polarizations is essentially different from 3:1, and strongly depends on n_s. These results show that a description that neglects the d-like part of the acceptor envelope is both qualitatively and quantitatively unjustified.
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Journal
Year
Volume
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Pages
1079-1083
Physical description
Dates
published
2008-11
received
2008-06-07
Contributors
author
- Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
author
- Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
author
- Paul-Drude-Institut fűr Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany
author
- Paul-Drude-Institut fűr Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany
author
- Paul-Drude-Institut fűr Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany
References
- 1. I.V. Kukushkin, V.B. Timofeev, Adv. Phys. 45, 147 (1996)
- 2. I.V. Kukushkin, J.H. Smet, K. von Klitzing, K. Eberl, Phys. Rev. Lett. 85, 3688 (2000)
- 3. J.Łusakowski, R. Buczko, M. Sakowicz, K.-J. Friedland, R. Hey, K. Ploog, J. Phys., Condens. Matter 19, 236205 (2007)
- 4. A. Baldereschi, N.O. Lipari, Phys. Rev. B 8, 2697 (1973)
Document Type
Publication order reference
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YADDA identifier
bwmeta1.element.bwnjournal-article-appv114n513kz