Spectroscopy of Be Acceptor Ground State in GaAs/AlGaAs Heterostructure

• Authors: J. Łusakowski , R. Buczko , M. Sakowicz , K. Friedland , R. Hey , K. Ploog
• Languages of publication: 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

71.70.Ej; 78.67.De

Discipline

• 78.67.De: Quantum wells
• 71.70.Ej: Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 2
• Pages: 209-213

Dates

published

2007-08

received

2007-06-09

Contributors

author

J. Łusakowski

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

R. Buczko

• Institute of Physics, Polish Academy of Sciences, al. Lotnikłw 32/46, 02-668 Warsaw, Poland

author

M. Sakowicz

• Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland

author

K. Friedland

• Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany

author

R. Hey

• Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, 10117 Berlin, Germany, Hausvogteiplatz 5-7, 10117 Berlin, Germany

author

K. Ploog

• 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

Identifiers

DOI

10.12693/APhysPolA.112.209