The wave-function localization on a single-monolayer length scale is studied by magnetophotoluminescence in GaSb quantum wells of thickness ranging between 5 and 40 ML. The excitonic effects are found to be important only in the low-field range (B(2 T), whereas free-carrier localization dominates at higher field values. Variational calculations of the excitonic transverse extension provide a quantitative description of the experimental data. The high sensitivity of the magnetoluminescence to the modifications of the wave function, even on the scale of a single monolayer, has been used to deduce experimentally the dependence of the effective reduced mass on the well width.
Variation of the wave function localization on the monolayer scale in GaSb quantum wells probed by magnetoluminescence
A Convertino;
1995
Abstract
The wave-function localization on a single-monolayer length scale is studied by magnetophotoluminescence in GaSb quantum wells of thickness ranging between 5 and 40 ML. The excitonic effects are found to be important only in the low-field range (B(2 T), whereas free-carrier localization dominates at higher field values. Variational calculations of the excitonic transverse extension provide a quantitative description of the experimental data. The high sensitivity of the magnetoluminescence to the modifications of the wave function, even on the scale of a single monolayer, has been used to deduce experimentally the dependence of the effective reduced mass on the well width.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
