OPTICALLY DETECTED CYCLOTRON-RESONANCE OF GAAS QUANTUM-WELLS - EFFECTIVE-MASS MEASUREMENTS AND OFFSET EFFECTS
| Autor: | Richard J. Warburton, Robin J. Nicholas, J. J. Harris, J.G. Michels, C. T. Foxon |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Photoluminescence Materials science Condensed matter physics Condensed Matter::Other Binding energy Cyclotron resonance Radiation Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Electron localization function Condensed Matter::Materials Science Effective mass (solid-state physics) chemistry Atomic physics Inorganic compound Quantum well |
| Popis: | We have detected cyclotron resonance in a series of undoped GaAs quantum wells by modulating the photoluminescence intensity with far-infrared radiation. The conduction-band mass was measured for different quantum-well widths, and good agreement with a simple formula based on k\ensuremath{\cdot}p theory is achieved. An offset was observed in the cyclotron-resonance energy, strongly dependent on well width. The interpretation is that monolayer-width fluctuations localize the carriers, giving an additional binding energy to the cyclotron-resonance transition. |
| Databáze: | OpenAIRE |
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