Evidence of Singlet-Triplet Crossing in Photoluminescence of Positively Charged Excitons in GaAs Quantum Wells

• Authors: L. Bryja , A. Wójs , J. Jadczak , J. Misiewicz , P. Płochocka , M. Potemski , D. Reuter , A. Wieck
• Languages of publication: EN

Abstracts

EN

Positively charged excitons in a two-dimensional hole gas in symmetric and asymmetric GaAs/Ga_{1-x}Al_{x}As quantum wells are studied in polarization-resolved photoluminescence experiments in high magnetic fields B (up to 23 T) and low temperatures (down to 300 mK). The experiments are accompanied by numerical calculations of a real structure. The whole family of trions (the singlet and a pair of triplets) are observed. The Coulomb energies crossing of singlet and triplet is found: hidden in symmetric and visible in asymmetric structures.

Keywords

EN

73.20.Mf; 71.35.Ji; 71.35.Pq; 78.20.Ls

Discipline

• 78.20.Ls: Magneto-optical effects(for magneto-optical devices, see 85.70.Sq)
• 71.35.Ji: Excitons in magnetic fields; magnetoexcitons
• 73.20.Mf: Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)(for collective excitations in quantum Hall effects, see 73.43.Lp)
• 71.35.Pq: Charged excitons (trions)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 5
• Pages: 1073-1077

Dates

published

2008-11

received

2008-06-07

Contributors

author

L. Bryja

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

A. Wójs

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

J. Jadczak

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

J. Misiewicz

• Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

author

P. Płochocka

• Grenoble High Magnetic Field Laboratory, CNRS, 25 av. Martyrs, F-38042 Grenoble, France

author

M. Potemski

• Grenoble High Magnetic Field Laboratory, CNRS, 25 av. Martyrs, F-38042 Grenoble, France

author

D. Reuter

• Lehrstuhl fur Festkörperphysik, Ruhr Universität, Universitätstrasse 150, 44780 Bochum, Germany

author

A. Wieck

• Lehrstuhl fur Festkörperphysik, Ruhr Universität, Universitätstrasse 150, 44780 Bochum, Germany

References

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• 6. L. Bryja, A. Wójs, J. Misiewicz, M. Potemski, D. Reuter, A. Wieck, Phys. Rev. B 75, 035308 (2007)
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Identifiers

DOI

10.12693/APhysPolA.114.1073