Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN
| Autor: | Atsushi Tackeuchi, Masataka Kajikawa, Ji-Hao Liang, T. Ushiyama, T. Kuroda, Takako Chinone, Taisuke Fujita, Hirotaka Otake |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Physics and Astronomy (miscellaneous) Condensed matter physics Spin polarization Chemistry Exciton Wide-bandgap semiconductor Molecular physics Acceptor Exponential function Spin–spin relaxation Condensed Matter::Materials Science Picosecond Quasiparticle Condensed Matter::Strongly Correlated Electrons Time-resolved spectroscopy Spin-½ Wurtzite crystal structure |
| Zdroj: | AIP Conference Proceedings. |
| ISSN: | 0094-243X |
| DOI: | 10.1063/1.2730386 |
| Popis: | The spin relaxation process of acceptor-bound excitons in wurtzite GaN is observed by spin-dependent pump and probe reflectance measurement with subpicosecond time resolution. The time evolutions measured at 15–50K have a single exponential component corresponding to the electron spin relaxation time of 1.40–1.14ps. The spin relaxation time is found to be proportional to T−0.175, where T is the temperature. This weak temperature dependence indicates that the main spin relaxation mechanism is the Bir-Aronov-Pikus process [Sov. Phys. JETP 42, 705 (1976)]. |
| Databáze: | OpenAIRE |
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