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1997 | 92 | 5 | 851-865
Article title

Magnetotransport and Magnetooptics of InAs_{1-x}Sb_{x} and Heterojunctions Combinations Formed Between InAs and GaSb, AlSb Or InAs_{1 -x}Sb_{x}

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EN
Abstracts
EN
Cyclotron resonance and interband measurements are reported in magnetic fields up to 160 T for InAs/InAs_{1-x}Sb_{x} superlattices, one of which is a "self-organised" or "natural" superlattice, and InAs_{1-x}Sb_{x} epilayers. The samples were grown by MBE at temperatures between 370°C to 500°C. No dependence of the band gap, effective masses or g-values on the growth temperature was detected. Anomalous tilt behaviour was observed for the superlattices. Inversion asymmetry induced spin-splitting of the subbands in gated InAs quantum wells is investigated by means of the Shubnikov-de Haas effect and cyclotron resonance. The non-parabolicity was well fitted by Kane theory, although the measured values of effective mass were substantially higher than predictions. Infrared life time measurements at wavelengths between 6 and 85 microns are undertaken with free electron lasers on InAs/InAs_{1-x}Sb_{x} superlattices and InAs/AlSb quantum wells. Suppression of the Auger recombination times is demonstrated with the superlattices.
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  • Blackett Laboratory, Imperial College of Science, Technology & Medicine, London SW7 2BZ, UK
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bwmeta1.element.bwnjournal-article-appv92z501kz
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