Numéro
Le Journal de Physique IV
Volume 03, Numéro C5, Octobre 1993
Third International Conference on Optics of Excitons in Confined
Page(s) C5-175 - C5-178
DOI http://dx.doi.org/10.1051/jp4:1993532
Third International Conference on Optics of Excitons in Confined

Le Journal de Physique IV 03 (1993) C5-175-C5-178

DOI: 10.1051/jp4:1993532

Electron spin-polarization in p-doped quantum wells

R. FERREIRA1, Ph. ROUSSIGNOL1, P. ROLLAND1, G. BASTARD1, C. DELALANDE1, A. VINATTIERI2 and G. WEIMANN3

1  Laboratoire de Physique de la Matière Condensée de l'Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
2  Dipartimento de Fisica and LENS, Universita di Firenze, Largo E. Fermi 2, 50125 Firenzi, Italy
3  Walter Schottky Institut der TU München, Am Coulombwall, 8046 Garching, Germany


Abstract
We study both theoretically and experimentally the luminescence in non-intentionally but heavily p-doped GaAs quantum wells of 55 and 150A width. At T=2K the PL spectra under cw excitation present an excitonic peak and a broad acceptor band. Time-resolved optical pumping of the acceptor line allows us to measure the free electron spin relaxation time. We have investigated its temperature dependence in the 4-40K range. The experimental findings are interpreted in the framework of the D'Yakonov-Perel' mechanism for the electron gas.



© EDP Sciences 1993