The Role of Spin in Interacting Excitonic Gases
| Autor: | E. E. Mendez, G. Aichmayr, R. T. Phillips, S. P. Kennedy, Luis Viña |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Condensed Matter::Quantum Gases
Photoluminescence Spin polarization Condensed Matter::Other Chemistry Exciton Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Electric field Atomic physics Spin (physics) Excitation Quantum well |
| Zdroj: | physica status solidi (a). 190:615-623 |
| ISSN: | 1521-396X 0031-8965 |
| DOI: | 10.1002/1521-396x(200204)190:3<615::aid-pssa615>3.0.co;2-n |
| Popis: | The spin-dependent exciton-exciton interactions in GaAs quantum well (QW) systems have been studied, under resonant and non-resonant excitation conditions at liquid helium temperatures. In the former case, a pure exciton gas is created, whereas in the latter the excitons are surrounded by a charged electron-hole plasma. In a double QW structure, the distance between electrons and holes comprising the excitons could be externally tuned by applying an electric field perpendicular to the well planes. The interactions were studied in terms of their dependence on excitation intensity, excess energy, spin polarization and electron-hole separation using time- and polarization-resolved photoluminescence up-conversion spectroscopy. |
| Databáze: | OpenAIRE |
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