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|Type:||Artigo de periódico|
|Title:||Γ - Xx Mixing In Gaas-g A1-xa Lxas Quantum Wells Under Hydrostatic Pressure|
|Abstract:||The mixing between the Γ and X conduction-band valleys in GaAs-Ga 1-xAl xAs quantum wells is investigated by using a phenomenological model which takes into account the effects of applied hydrostatic pressure. The dependencies of the variationally calculated photoluminescence peak-energy transitions on the applied hydrostatic pressure and quantum-well width are presented. A systematic study of the Γ-X mixing parameter is also reported. In particular, it is shown that the inclusion of the Γ-X mixing explains the non-linear behavior in the photoluminescence peak of confined exciton states that has been experimentally observed for pressures above 15 kbar in GaAs-Ga 1-xAl xAs quantum wells. © 2008 EDP Sciences/Società Italiana di Fisica/Springer-Verlag.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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