| 抛物阱中束缚极化子的结合能 |
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| 引用本文： | 元丽华,王旭,姜金龙.抛物阱中束缚极化子的结合能[J].兰州理工大学学报,2006,32(4):162-164. |
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| 作者姓名： | 元丽华 王旭 姜金龙 |
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| 作者单位： | 兰州理工大学,理学院,甘肃,兰州,730050;内蒙古大学,理学院,内蒙古,呼和浩特,010021 |
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| 基金项目： | 国家自然科学基金
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兰州理工大学校科研和教改项目 |
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| 摘 要： | 采用体纵光学(LO)声子近似,利用改进的LLP方法,对两次幺正变换处理电子?LO声子相互作用和施主离子?LO声子相互作用进行了研究.用第一次幺正变换求出极化势;用第二次幺正变换可计算出无限深抛物量子阱中束缚极化子的结合能.结果表明,在阱中心极化势对极化子能量的贡献较大.阱宽较小时,束缚极化子的结合能随阱宽L的增大而急剧减小;阱宽较大时,能量减小缓慢趋近于体材料的三维值.
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| 关 键 词： | 抛物阱 极化子 电子-声子相互作用 结合能 |
| 文章编号： | 1673-5196(2006)04-0162-03 |
| 收稿时间： | 2005-12-08 |
| 修稿时间： | 2005年12月8日 |
Binding energy of bound polaron in parabolic quantum well |
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| YUAN Li-hua,WANG Xu,JIANG Jin-long.Binding energy of bound polaron in parabolic quantum well[J].Journal of Lanzhou University of Technology,2006,32(4):162-164. |
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| Authors: | YUAN Li-hua WANG Xu JIANG Jin-long |
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| Institution: | 1. School of Science, Lanzhou Univ. of Tech. , Lanzhou 730050, China; 2. Department of Physics, Inner Mongolia University,Huhehot 010021, China |
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| Abstract: | Using bulk longitudinal optical(LO) phonons approximation and improved LLP method,the interaction of electron with LO phonon and that of ion-donor with LO phonon were investigated by two canonical transformations.By using the first canonical transformation,the polarization potential can be gained.By using the second canonical transformation,the energy of the bound polaron in the infinite PQW could be work out.It was found that the contribution of the polarization potential to the energy of bound polaron was obvious in the center of the well;the binding energy of bound polaron decreased rapidly with well width(L) at the beginning,then decreased very slowly with L,and finally approached to the 3D-value of the bulk. |
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| Keywords: | parabolic quantum well polaron electronphonon interaction binding energy |
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