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Photo-induced magnetic polarons in semiconductors |
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| Authors: | S Takeyama S Adachi Y Takagi |
| Institution: | 1. Department of Physics , Faculty of Science, Chiba University , 1-33, Yayoi-cho, Inage-ku , Chiba-shi , 263-8522 , Japan;2. Graduate School of Engineering, Hokkaido University , N13 W8, Sapporo , 060-8628 , Japan;3. Department of Physics , Faculty of Science, Chiba University , 1-33, Yayoi-cho, Inage-ku , Chiba-shi , 263-8522 , Japan;4. Department of Material Science , Faculty of Science, Himeji Institute of Technology , 3-2-1 Kohto, Kamigori-cho, Hyogo , 678-1297 , Japan;5. Phone: +81-791-58-0139 Fax: +81-791-58-0139 E-mail: takagi@sci.himeji-tech.ac.jp |
| Abstract: | Exciton magnetic polarons observed in dilute magnetic semiconductors were investigated by steady-state and pico-second time-resolved photoluminescence measurements and have shown characteristic behavior of exciton localization processes in bulk-Cd1-x Mn x Te and also in the quantum structures composed of the dilute magnetic semiconductors. For the quantum structures spin-dependent coherent polarizations associated with excitons and biexcitons were studied by degenerate four-wave mixing experiment. Also investigated for different chalcogenide spinel ferromagnetic semiconductors was photo-induced enhancement of exchange interaction between magnetic ions by direct magnetic flux detection in the vicinity of the Curie temperatures. |
| Keywords: | Dilute magnetic semiconductor Quantum structures Exciton magnetic polaron Magneto-photoluminescence Four-wave mixing Biexciton Spin relaxation Ferromagnetic semiconductor Photoinduced magnetization |