Optical Γ₆ → Γ₈ Free-to-Bound Transitions in Acceptor δ-Doped Single Heterostructure - Theoretical Analysis

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

Abstracts

EN

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.

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

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 5
• Pages: 1079-1083

Dates

published

2008-11

received

2008-06-07

Contributors

author

R. Buczko

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

author

J. Łusakowski

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

author

K. Friedland

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

author

R. Hey

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

author

K. Ploog

• 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)

Identifiers

DOI

10.12693/APhysPolA.114.1079