| 极性晶体中三维和二维声学极化子自陷的有效质量特征 |
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| 引用本文： | 侯俊华,梁希侠. 极性晶体中三维和二维声学极化子自陷的有效质量特征[J]. 内蒙古大学学报(自然科学版), 2007, 38(5): 517-521 |
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| 作者姓名： | 侯俊华 梁希侠 |
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| 作者单位： | 内蒙古大学物理系,呼和浩特,010021;内蒙古大学物理系,呼和浩特,010021 |
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| 基金项目： | 高等学校博士学科点专项科研项目 , 内蒙古自然科学基金 |
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| 摘 要： | 运用Huybrechts方法研究了三维和二维声学极化子有效质量作为电子-声子耦合参量的函数的变化特征.对二维声学极化子的研究,采用了我们最近导出的电子-声学声子相互作用哈密顿量.结果表明:电子-声子耦合达到一定强度时声学极化子有效质量发生突变而使极化子自陷,声学极化子在二维系统中比三维条件下更容易自陷.
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| 关 键 词： | 声学极化子 有效质量 自陷 |
| 文章编号： | 1000-1638（2007）05-0517-05 |
| 修稿时间： | 2006-12-11 |
Characters of Effective Masses for the Self-trapping of 3D and 2D Acoustical Polarons in Polar Crystals |
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| HOU Jun-hua,LIANG Xi-xia. Characters of Effective Masses for the Self-trapping of 3D and 2D Acoustical Polarons in Polar Crystals[J]. Acta Scientiarum Naturalium Universitatis Neimongol, 2007, 38(5): 517-521 |
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| Authors: | HOU Jun-hua LIANG Xi-xia |
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| Affiliation: | Department of Physics, Inner Mongolia University, Hohhot 010021 ,China |
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| Abstract: | The variational computations for the effective masses of acoustical polarons as a function of the e-p coupling constants in 3D and 2D are respectively performed by Huybrechts approach.The 2D electron-acoustical phonon interaction Hamiltonian we derived recently is applied to the calculation.The results indicate: the effective mass of an acoustical polaron undergoes a sudden increasing when the e-p coupling constant achieves the critical value and then the self-trapping occurs.The self-trapping of the acoustical polarons in 2D is easier to be realized than that in 3D case. |
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| Keywords: | acoustical polaron effective mass self-trapping |
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