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- W287425350 abstract "Low-temperature magnetoluminescence measurements have been performed in several n-type InGaAs/GaAs single-strained-quantum-wells with varying internal strain and a n-type GaAs/GaAsP strained-layer-superlattice. Using newly discovered selection rules, an analysis of the data yields simultaneous information about the conduction and valence-band dispersion curves from a single sample. We find that the conduction-bands are parabolic for all of our structures, with effective mass in the range of 0.068 to 0.074m/sub 0/. The valence-bands are found to be nonparabolic and strain dependent. A simple two-band model is used to analyze the nonparabolicity in terms of a zone-center mass m and a parameter C which is expressed in terms of the light-hole and heavy-hole energy difference. From the two-band model, predictions for the valence-band mass as a function of the 2D-carrier concentration can be made. These predictions are found to be in good agreement with recent cyclotron resonance measurements of the mass in p-type samples. 10 refs., 6 figs., 1 tab." @default.
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- W287425350 date "1989-01-01" @default.
- W287425350 modified "2023-09-23" @default.
- W287425350 title "Strain and density dependent valence-band masses in InGaAs/GaAs and GaAs/GaAsP strained-layer structures" @default.
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