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The subband structure of a two-dimensional electron system at a GaAs/Al x Ga 1- x As heterojunction interface is calculated. Many-body exchange and correlation effects are taken into account in the local density-functional approximation. They are shown to be unimportant but not negligibly small. Spectra of light scatterings are also calculated. Results are in reasonable agreement with existing experiments.
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Tsuneya Ando (1982) studied this question.
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