Aj. Chiquito et al., Thermostabilization of electrical properties of InAs/GaAs self-assembled quantum dots embedded in GaAs/AlAs superlattices, JPN J A P 1, 40(3B), 2001, pp. 2006-2009
The electrical characteristics of the self-assembled quantum dots embbeded
in GaAs wells of the GaAs/AlAs superlattices were studied by capacitance sp
ectroscopy and were compared with results obtained for the dots embbeded in
bulk GaAs. A much stronger electron localization was detected for the quan
tum dots embedded in the superlattice in comparison with those embedded in
bulk GaAs. As a consequence, the electrical characteristics of the structur
es with quantum dots grown in superlattices were found to be significantly
thermo-stabilized. It was shown that these structures present different str
engths of the localization of electrons caused by the effective increase of
the heights of the barriers when the dots were grown in the superlattices.