| Self-Trapping of Acoustic Polaron in One Dimension |
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| 作者姓名： | 侯俊华 梁希侠 |
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| 作者单位： | Department of Physics, Inner Mongolia University, Hohhot 010021 |
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| 基金项目： | Supported by the PhD Progress Foundation of Higher Education of China under Grant No 20040126003, and the Natural Science Foundation of Inner Mongol of China under Grant No 200408020101. |
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| 摘 要： |
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| 关 键 词： | 声功率 声学 极化子 物理分析 |
| 收稿时间： | 2007-07-02 |
Self-Trapping of Acoustic Polaron in One Dimension |
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| HOU Jun-Hua,LIANG Xi-Xia.Self-Trapping of Acoustic Polaron in One Dimension[J].Chinese Physics Letters,2007,24(11):3222-3224. |
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| Authors: | HOU Jun-Hua LIANG Xi-Xia |
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| Affiliation: | Department of Physics, Inner Mongolia University, Hohhot 010021 |
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| Abstract: | The ground-state energy and effective mass of an acoustic polaron in one dimension are calculated by using an electron-longitudinal-acoustic-phonon interaction Hamiltonian derived here. The self-trapping of the acoustic polaron is discussed. It is found that the critical coupling constant shifts toward weaker electron-phonon interaction with the increasing cutoff wave vector and the products of the critical coupling constant by the cutoff wave vector tend to a certain value. The self-trapping of acoustic polarons in one dimension is easier to be realized than that in three- and two-dimensional systems. The self-trapping transition of acoustic polarons is expected to be observed in the one dimensional systems of alkali halides and wide-band-gap semiconductors. |
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| Keywords: | 71 38 Fp 73 20 Mf 63 20 Kr |
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