Band Mixing Effects in Quantum Well Magnetoexcitons |
| R. Wysocki, W. Bardyszewski Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland S. Schoser and M. Potemski Grenoble High Magnetic Field Laboratory, MPI/FKF and CNRS, BP 166 Grenoble, Grenoble cedex 9, France |
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| The influence of intersubband mixing in quantum wells of semiconductors with zinc-blende structure is studied both experimentally and theoretically. A multiband magnetoexciton model is described which takes into account k∙p mixing between valence subbands and the effective Coulomb interaction for an arbitrary confinement potential shape. Theoretical results reproduce very well the photoluminescence excitation spectra of GaAs/AlGaAs single quantum wells of various widths. In particular, the characteristic avoided crossing between the lowest light-hole exciton Landau level and excited heavy-hole exciton Landau level occurring at σ¯ polarization is accurately described by our theory. |
| DOI: 10.12693/APhysPolA.92.1067 PACS numbers: 71.35.Ji, 71.70.Ej |