Electronic Structure of Intentionally Disordered AlAs/GaAs Superlattices
- 27 March 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 74 (13), 2555-2558
- https://doi.org/10.1103/physrevlett.74.2555
Abstract
We use realistic pseudopotentials and a plane-wave basis to study the electronic structure of nonperiodic, three-dimensional, 2000-atom (AlAs/(GaAs (001) superlattices, where the individual layer thicknesses are randomly selected. We find that while the band gap of the equivalent ( ) ordered superlattice is indirect, random fluctuations in layer thicknesses lead to a direct gap in the planar Brillouin zone, strong wave function localization along the growth direction, short radiative lifetimes, and a significant band-gap reduction, in agreement with experiments on such intentionally grown disordered superlattices.
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This publication has 13 references indexed in Scilit:
- Solving Schrödinger’s equation around a desired energy: Application to silicon quantum dotsThe Journal of Chemical Physics, 1994
- Enhancement of optical absorption induced by disorder in three-dimensional random superlatticesApplied Physics Letters, 1994
- Optical and luminescence properties of disordered superlatticesJournal of Crystal Growth, 1991
- Electronic Properties of Ultrathin Isoelectronic Intralayers in SemiconductorsMRS Proceedings, 1991
- Proposal and Experimental Results of Disordered Crystalline SemiconductorsJapanese Journal of Applied Physics, 1989
- Photoluminescence of disorder-induced localized states in GaAs/As superlatticesPhysical Review B, 1989
- (111) oriented (GaAs)n(AlAs)n superlattices are direct band-gap materials for all n’sApplied Physics Letters, 1988
- Observation of Carrier Localization in Intentionally Disordered Gaas/Gaalas SuperlatticesPhysical Review Letters, 1986
- Eigenfunctions in one-dimensional disordered systems. II. Results and discussionPhysical Review B, 1976
- The nature of the electronic states in disordered one-dimensional systemsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1963