| GaMnAs合金中等离子体激元-LO声子耦合模的拉曼光谱研究 |
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| 引用本文： | 李国华,马宝珊,王文杰,苏付海,丁琨,赵建华,邓加军,蒋春萍.GaMnAs合金中等离子体激元-LO声子耦合模的拉曼光谱研究[J].光散射学报,2006,18(2):106-114. |
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| 作者姓名： | 李国华 马宝珊 王文杰 苏付海 丁琨 赵建华 邓加军 蒋春萍 |
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| 作者单位： | 中国科学院半导体研究所,半导体超晶格国家重点实验室,北京,100083 |
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| 摘 要： | 理论分析了两种阻尼条件下重掺杂GaAs中的等离子体激元-LO声子耦合模,证实在小阻尼条件下耦合模的拉曼谱分为两支,而在大阻尼条件下只有一个耦合模可以被观测到。推导得到了只出现一个耦合模所需的最小阻尼的解析表达式。测量了Mn组分从2.6%到9%的GaMnAs合金的拉曼光谱。利用等离子体激元-LO声子耦合模理论进行了谱形拟合,得到了所测的GaMnAs合金中的空穴浓度。
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| 关 键 词： | GaMnAs合金 等离子体激元-LO声子耦合模 稀磁半导体 拉曼光谱 |
| 文章编号： | 1004-5929(2006)02-0106-08 |
| 收稿时间： | 2005/6/17 |
| 修稿时间： | 2005年6月17日 |
Raman Study of Coupled Plasmon-LO Phonon Modes in Ga1-xMnxAs Alloy |
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| LI Guo-hua,MA Bao-shan,WANG Wen-jie,SU Fu-hai,DING Kun,ZHAO Jian-hua,DENG Jia-jun,JIANG Chun-ping.Raman Study of Coupled Plasmon-LO Phonon Modes in Ga1-xMnxAs Alloy[J].Chinese Journal of Light Scattering,2006,18(2):106-114. |
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| Authors: | LI Guo-hua MA Bao-shan WANG Wen-jie SU Fu-hai DING Kun ZHAO Jian-hua DENG Jia-jun JIANG Chun-ping |
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| Abstract: | The coupled plasmon-LO phonon(CPLP) modes in heavily doped GaAs have been investigated theoretically for two damping conditions.It was demonstrated that there exist two branches of CPLP modes in the small damping condition.However,only one CPLP mode appears in the large damping condition.The analytic expression of the minimum damping constant for observation of one CPLP mode was deduced.The Raman spectra of GaMnAs alloy with Mn composition from 2.6% to 9% were measured and analyzed according to the theory of CPLP modes.The hole densities of the GaMnAs alloy were then determined. |
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| Keywords: | GaMnAs alloy coupled plasmon-LO phonon mode diluted magnetic semiconductor Raman spectra |
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