Γ-Xmixing in the miniband structure of a GaAs/AlAs superlattice
- 13 November 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 63 (20) , 2284-2287
- https://doi.org/10.1103/physrevlett.63.2284
Abstract
We have studied the anisotropy in the band structure of a strongly coupled GaAs/AlAs superlattice by the application of a magnetic field. An anticrossing behavior between the Γ and X states in the superlattice dispersion is demonstrated by the presence of an energy gap in the Landau-level diagram for cyclotron motion through the layers. A simple model is developed to treat Γ-X mixing at interfaces in the envelope-function approximation and the observed mixing strength is examined in terms of theoretical predictions.Keywords
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