| 电子速度对半导体量子点中极化子的声子平均数的影响 |
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| 引用本文： | 刘亚民,肖景林.电子速度对半导体量子点中极化子的声子平均数的影响[J].内蒙古民族大学学报(自然科学版),2006,21(5):492-495. |
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| 作者姓名： | 刘亚民 肖景林 |
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| 作者单位： | 1. 内蒙古呼伦贝尔学院,物理系,内蒙古,海拉尔,021008
2. 内蒙古民族大学,物理与机电学院,内蒙古,通辽,028043 |
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| 摘 要： | 采用改进的线性组合算符和幺正变换方法研究半导体量子点中强、弱耦合极化子的振动频率和声子平均数的性质．导出了电子速度对半导体量子点中强、弱耦合极化子的声子平均数的影响．数值计算结果表明：半导体量子点中强耦合极化子的振动频率随量子点的受限强度的增加而增大，半导体量子点中强、弱耦合极化子的声子平均数随电子速度的增加而增加
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| 关 键 词： | 半导体量子点 电子速度 线性组合算符 声子平均数 |
| 文章编号： | 1671-0185(2006)05-0492-04 |
| 修稿时间： | 2006年4月17日 |
Influence of Electronic Velocity on Mean Number of Phonons of Polaron in a Semiconductor Quantum Dot |
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| LIU Ya-min,XIAO Jing-lin.Influence of Electronic Velocity on Mean Number of Phonons of Polaron in a Semiconductor Quantum Dot[J].Journal of Inner Mongolia University for the Nationalities(Natural Sciences),2006,21(5):492-495. |
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| Authors: | LIU Ya-min XIAO Jing-lin |
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| Abstract: | The properties of the vibrational frequency and mean number of phonons of the strong-and weak-coupling polaron in a semiconductor quantum dot are studied by using the improved linear combination operator and the unitary transformation methods.The influences of the electronic velocity on the mean number of phonons of the strong-and weak-coupling polaron in a semiconductor quantum dot are derived.Numerical calculations for the CdF_2 and ZnS semiconductor crystals,as an example,are performed and the results show that the vibrational frequency of strong-coupling polaron will increase with the ease of confinement strength of semiconductor quantum dot.The mean number of phonons of strong-and weak-coupling polaron in a semiconductor quantum dot will increase the increase of electronic velocity. |
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| Keywords: | Semiconductor quantum dot Electronic velocity Linear combination operator Mean number of phonons |
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