Cyclotron resonance and far-infrared magneto-absorption experiments on semimetallic InAs-GaSb superlattices

Abstract

Far-infrared magneto-absorption experiments performed in semimetallic InAs-GaSb superlattices are presented. The results are interpreted in terms of cyclotron resonance and interband transitions from the valence subbands to the conduction subbands. The resulting energy gaps of the superlattices are found to be negative, demonstrating directly their semimetallic nature. The observed electron mass is enhanced as a result of the conduction-band nonparabolicity. © 1980 The American Physical Society.