| GaMnAs的Raman光谱研究 |
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| 引用本文： | 马宝珊 王文杰 苏付海 邓加军 蒋春萍 刘海林 丁琨 赵建华 李国华. GaMnAs的Raman光谱研究[J]. 红外与毫米波学报, 2006, 25(3): 207-212 |
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| 作者姓名： | 马宝珊 王文杰 苏付海 邓加军 蒋春萍 刘海林 丁琨 赵建华 李国华 |
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| 作者单位： | 中国科学院半导体研究所,超晶格国家重点实验室,北京,100083;武汉大学,物理学院,湖北,武汉,430072 |
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| 摘 要： | 报道了磁性半导体材料GaMnAs的拉曼光谱,发现其空穴等离子体激元与LO声子振动耦合形成的CPLP模具有类LO模的偏振特性.随着Mn组分的增加,CPLP模的拉曼频率红移,通过CPLP模与耗尽层中未屏蔽的LO模的强度比计算了合金中的空穴载流子浓度.发现空穴浓度随Mn组分的增加而迅速增加.测量了不同温度下GaM-nAs合金的拉曼光谱.证实合金中空穴浓度随温度的增加而增加.
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| 关 键 词： | GaMnAs 拉曼光谱 等离激元与声子耦合模 空穴浓度 |
| 文章编号： | 1001-9014（2006）03-0207-06 |
| 收稿时间： | 2005-12-01 |
| 修稿时间： | 2006-02-16 |
STUDY ON RAMAN SPECTRA OF GaMnAs |
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| MA Bao-Shan,WANG Wen-Jie,SU Fu-Hai,DEN Jia-jun,JIANG Chun-Ping,LIU Hai-Lin,DING Kun,ZHAO Jian-Hu,LI Guo-Hua. STUDY ON RAMAN SPECTRA OF GaMnAs[J]. Journal of Infrared and Millimeter Waves, 2006, 25(3): 207-212 |
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| Authors: | MA Bao-Shan WANG Wen-Jie SU Fu-Hai DEN Jia-jun JIANG Chun-Ping LIU Hai-Lin DING Kun ZHAO Jian-Hu LI Guo-Hua |
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| Affiliation: | 1. State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; 2. Department of Physics, Wuhan University, Wuhan 430072, China |
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| Abstract: | Raman spectra of diluted magnetic semiconductor GaMnAs alloy were reported.The coupled plamon-LO-phonon(CPLP) mode has LO-like polarization properties.With increasing Mn concentration,the CPLP mode shifts to low frequency.The hole density in the alloy was determined from the ratio of the intensity of the CPLP mode to that of the unscreened LO mode in the depletion layer.The hole density increases with the increase of the Mn composition.The Raman spectra of GaMnAs alloy were measured at different temperature.It is confirmed that the hole density in the alloy increases with the increase of the temperature. |
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| Keywords: | GaMnAs Raman spectrum coupled plamon-LO-phonon mode hole density |
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