| 极性晶体膜中强耦合激子的性质 |
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| 引用本文： | 杨洪涛,冀文慧,胡文弢,呼和满都拉.极性晶体膜中强耦合激子的性质[J].原子与分子物理学报,2015,32(1):163-167. |
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| 作者姓名： | 杨洪涛 冀文慧 胡文弢 呼和满都拉 |
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| 作者单位： | 集宁师范学院,集宁师范学院,集宁师范学院,集宁师范学院 |
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| 基金项目： | 内蒙古自治区高等学校科学研究项目（NJZY11287）；内蒙古自治区高等学校科学研究项目（NJZY12248） |
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| 摘 要： | 在强耦合极化子模型基础上,采用Lee-Low-Pines(LLP)变分法研究了极性晶体膜中激子与表面光学(SO)声子强耦合、与体纵光学(LO)声子弱耦合体系的性质.讨论了极性晶体膜中激子的诱生势与膜厚度和温度的变化关系.结果表明:激子的诱生势不仅与电子-空穴间距离有关,而且与极性晶体膜厚度有关,同时温度对激子诱生势的影响十分显著.
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| 关 键 词： | 激子 强耦合 诱生势 温度 膜厚度 |
| 收稿时间： | 5/9/2014 12:00:00 AM |
The properties of the strong-coupling exciton in slab of polar crystals |
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| YANG Hong-Tao,Ji Wen-Hui,and.The properties of the strong-coupling exciton in slab of polar crystals[J].Journal of Atomic and Molecular Physics,2015,32(1):163-167. |
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| Authors: | YANG Hong-Tao Ji Wen-Hui and |
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| Abstract: | The property, which is the exciton interaction both with the weak-coupling bulk longitudinal-optical (LO) phonons and strong-coupling surface-optical (SO) phonons in a slab of polar crystal, is studied by using the Lee-Low-Pines variational method based on the model of strong-coupling polaron. The relationship between the induced potential of the exciton in a polar crystal slab and the thickness of slab and temperature is derived. The results show that the induced potential of the exciton relates not only to the distance between electron and hole, but also to the thickness of slab, and the influence of temperature on the induced potential is notable. |
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| Keywords: | exciton strong-coupling induced potential temperature thickness of slab |
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