Abstract
The many-band envelope-function approximation to the band structure of semiconductor superlattices is extended to include an external magnetic field perpendicular to the layers. The Landau level structure for InAs-GaSb superlattices is computed, with emphasis on the “semi-metallic” range of layer thicknesses. The Landau levels display striking deviations from linear behavior as function of the field. The theoretical results compare favourably with magneto-optical experiments in the far infrared.
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