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2007 | 112 | 2 | 209-213
Article title

Spectroscopy of Be Acceptor Ground State in GaAs/AlGaAs Heterostructure

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EN
Abstracts
EN
Photoluminescence measurements were carried out on Be δ-doped GaAs/Al_{0.33}Ga_{0.67}As heterostructure at 1.6 K in magnetic fields (B) up to 4 T. Luminescence originating from recombination of a two-dimensional electron gas and photoexcited holes localized on Be acceptors was analyzed. The degree of circular polarization (γ_C) of the luminescence from fully occupied Landau levels was determined as a function of B and the two-dimensional electron gas concentration, n_s. At B constant,γ_C decreased with the increase in n_s. The intensity of the optical transition considered was calculated with taking into account s- and d-like parts of the acceptor envelope function. It is shown that the presence of the d-like part explains the observed γ_C(n_s) dependence quantitatively. This shows that polarization spectroscopy on acceptorδ-doped heterostructures enables one to test experimentally the contribution of the L>0 component of the envelope in a shallow acceptor description.
Keywords
EN
Publisher

Year
Volume
112
Issue
2
Pages
209-213
Physical description
Dates
published
2007-08
received
2007-06-09
Contributors
  • Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland
author
  • Institute of Physics, Polish Academy of Sciences, al. Lotnikłw 32/46, 02-668 Warsaw, Poland
author
  • Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland
author
  • Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany
author
  • Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany, Hausvogteiplatz 5-7, 10117 Berlin, Germany
author
  • Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany
References
  • 1. I.V. Kukushkin, V.B. Timofeev Adv. Phys., 45, 147, 1996
  • 2. J. Lusakowski, R. Buczko, M. Sakowicz, K.J. Friedland, R. Hey, K. Ploog, J. Phys., Condens. Matter, 19, 236205, 2007
  • 3. A. Baldereschi, N.O. Lipari, Phys. Rev. B, 8, 2697, 1973
  • 4. A. Baldereschi, N.O. Lipari, Phys. Rev. B, 9, 1525, 1974
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv112n213kz
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