| Autor: | Alfred Forchel, Margaret Dobrowolska, H. Schömig, Jacek K. Furdyna, Gerd Bacher, Seong Rae Lee |
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| Rok vydání: | 2003 |
| Předmět: |
Materials science
Photoluminescence Physics and Astronomy (miscellaneous) Condensed matter physics Condensed Matter::Other Exciton Demagnetizing field Physics::Optics Magnetic semiconductor Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Laser Electronic Optical and Magnetic Materials law.invention Condensed Matter::Materials Science Magnetization Quantum dot law Excitation |
| Zdroj: | Journal of Superconductivity. 16:379-382 |
| ISSN: | 0896-1107 |
| DOI: | 10.1023/a:1023694210050 |
| Popis: | The photoluminescene signal of individual semimagnetic CdSe–Zn0.75Mn0.25Se quantum dots is used to study the magnetization of the Mn2+ spin system in the exchange field of a single exciton. We demonstrate that by increasing the laser excitation power a significant blue shift of the photoluminescence signal occurs. This is attributed to a laser-induced demagnetization, i.e. the laser-generated carriers heat the Mn2+ spin system via spin–flip exchange scattering. |
| Databáze: | OpenAIRE |
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