Magnetism as a probe for wave function localization in GaSb/AlGaSb quantum wells
- 18 Downloads
The localization of the wave function on the scale length of a single monolayer has been studied by magnetophotoluminescence in GaSb/AlGaSb quantum wells. The studied range of well width includes the direct-indirect transition involvingL-point conduction states and Γ-point valence states induced by quantum size effects. Separate carrier localization dominates at higher field values (B>2T), whereas the excitonic effects are important only in the low field range. Variational calculations of the excitonic transverse extension provide a quantitative description of the experimental data. The dependence of the effective reduced mass on the well width has been obtained experimentally by magnetoluminescence that is highly sensitive to the modifications of the wave function, even on the scale of a single monolayer.
PACS 73.20Surface and interface electron states
PACS 71.35Excitons and related phenomena (including electron-hole drops)
PACS 01.30.CcConference proceedings
Unable to display preview. Download preview PDF.
- Leroux M. andMassies J., to be published byAppl. Phys. Lett. (1995).Google Scholar