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• W2020987044 startingPage "1554" @default.
• W2020987044 abstract "A new kensuremath{cdot}p theory for the description of GaAs/${mathrm{Ga}}_{1mathrm{ensuremath{-}}mathrm{x}}$${mathrm{Al}}_{mathrm{x}}$As-type quantum wells is presented. The theory combines a unified description of electron and hole states with only five adjustable parameters for each material constituting the quantum well. Unlike earlier kensuremath{cdot}p work it fully accounts for the coupling between the lowest electron, the light-hole, the heavy-hole, and the spin-orbit split-off hole bands and the coupling to all other bands is taken into account perturbatively. The theory thereby also applies to quantum wells where the spin-orbit splitting is comparable to the hole-confinement potential energies. The full inclusion of the ${mathrm{k}}_{?}$ dependence of confinement energies and electron-hole transition strengths allows for accurate predictions of excitation spectra of quantum wells. In this respect the results of our simple kensuremath{cdot}p theory stand comparison to the results of the more complicated tight-binding theory of Chang and Schulman. Our theory can thus explain the recently observed ensuremath{Delta}nensuremath{ne}0 transitions. As a final application we have calculated gain spectra of quantum-well lasers." @default.
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• W2020987044 date "1987-07-15" @default.
• W2020987044 modified "2023-09-23" @default.
• W2020987044 title "New<i>k⋅p</i>theory for GaAs/<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=normal>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>A</mml:mi><mml:mn>1</mml:mn><mml…" @default.
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• W2020987044 doi "https://doi.org/10.1103/physrevb.36.1554" @default.
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