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|Type:||Artigo de periódico|
|Title:||Gamma to X-z electron transfer times in type-II GaAs/AlAs superlattices due to emission of confined and interface phonons|
De Paula, AM
|Abstract:||We calculate the Gamma --> X-z electron transfer times due to the emission of confined and interface LO phonons in type-II GaAs-AlAs and AlGaAs-AlAs superlattices. A dielectric continuum model is employed to describe the electron-phonon interaction, and the electron envelope wavefunctions are obtained from a Kronig-Penney model. The calculated transfer times are in good agreement with available experimental results. We have used two different sets of AlAs X-valley effective masses obtained from different experiments and we show that the transfer times calculated with the heavier masses are in closer agreement with the measured data. (C) 1998 Academic Press Limited.|
|Editor:||Academic Press Ltd|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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