K-space formulation of -X mixing for excitons in a thin GaAs/AlAs quantum well

C. P. Chang, Yan Ten Lu

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Using a nonvariational method in k space, we study the effects of -X valley mixing on the structure of excitons in an asymmetric AlxGa1-xAs/AlAs/GaAs/ AlxGa1-xAs quantum well. The formulation of excitons in this system involves two complications due to -X mixing: the nonparabolic subband structures in the xy plane, and the Coulomb interaction between different electronic subbands. These effects lead to a set of two coupled integral equations. The eigenvalues and functions thus obtained are then used to compute the optical absorption spectra for various structures near the -X crossing.

Original languageEnglish
Pages (from-to)5438-5442
Number of pages5
JournalPhysical Review B
Volume49
Issue number8
DOIs
Publication statusPublished - 1994 Jan 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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