Anisotropic valence bands in quantum wells: Quantitative comparison of theory and experiment
- 12 October 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (15) , 2260-2263
- https://doi.org/10.1103/physrevlett.69.2260
Abstract
The valence subband dispersion of GaAs/AlGaAs quantum wells is measured with meV accuracy using the recombination of hot electrons at neutral acceptors. This precision, in combination with polarization-dependent matrix elements, allows direct observation and measurement of the warping. The measurements, for in-plane wave vectors which extend over a substantial fraction of the Brillouin zone, are shown to be in very good agreement with k⋅p calculations.Keywords
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