CYCLOTRON-RESONANCE IN INAS/GASB HETEROSTRUCTURES
| Autor: | G.M. Summers, N.J. Mason, Richard J. Warburton, P.J. Walker, Robin J. Nicholas, G. M. Sundaram |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Condensed matter physics Chemistry Superlattice Cyclotron resonance Heterojunction Landau quantization Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Materials Chemistry Metalorganic vapour phase epitaxy Electrical and Electronic Engineering Inorganic compound Quantum well |
| Popis: | Cyclotron resonance measurements are reported for both electrons and holes in type II InAs/GaSb superlattices and double heterostructures (DHETS). Superlattice (multi quantum well) samples of InAs/GaSb grown by MOVPE have sufficiently high hole gas mobilities and densities to allow the first measurements of hole cyclotron resonance in this system. The measured hole masses are approximately 0.1me and 0.2me, indicating a large reduction over the bulk values due to the decoupling of the valence band by strain and confinement. This is in good agreement with eight-band k . p theory reported here, and previous calculations. The electron masses in both superlattices and DHETS are found to be strongly influenced by non-parabolicity and the carrier concentration, leading to considerable increases over the band edge values. Similar values are found for both electron and hole masses in structures grown along both (001) and (111)A directions. |
| Databáze: | OpenAIRE |
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