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Type: Artigo de periódico
Title: Gamma-X mixing in GaAs-Ga(1-x)Al(x)As quantum wells under hydrostatic pressure
Author: Mora-Ramos, ME
Lopez, SY
Duque, CA
Abstract: The mixing between the Gamma and X conduction-band valleys in GaAs-Ga(1-x)Al(x)As 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 Gamma-X mixing parameter is also reported. In particular, it is shown that the inclusion of the Gamma-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-x)Al(x)As quantum wells.
Country: EUA
Editor: Springer
Citation: European Physical Journal B. Springer, v. 62, n. 3, n. 257, n. 261, 2008.
Rights: fechado
Identifier DOI: 10.1140/epjb/e2008-00161-6
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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