| 极性晶体中表面极化子的温度效应 |
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| 引用本文： | 肖玮,孙宝权.极性晶体中表面极化子的温度效应[J].发光学报,1993,14(3):253-264. |
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| 作者姓名： | 肖玮 孙宝权 |
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| 作者单位： | 内蒙古民族师范学院, 通辽 028043 |
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| 基金项目： | 中国科学院长春物理研究所激发态物理开放研究实验室基金 |
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| 摘 要： | 有不少的极性晶体,电子与体纵光学声子的耦合弱,但与表面光学声予的耦合强.本文讨论电子和体纵光学声子耦合弱,与表面光学声子耦合强时对表面极化子的温度特性的影响,用线性组合算符法研究表面极化子的振动频率、诱生势和有效质量的温度依赖性.对AgBr晶体进行了数值计算,结果表明极化子的振动频率,诱生势和有效质量随温度的升高而减小.
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| 关 键 词： | 表面极化子 温度效应 振动频率 诱生势 有效质量 |
| 收稿时间： | 1992-09-04 |
TEMPERATURE DEPENDENCE OF THE SURFACE POLARON IN POLAR CRYSTALS |
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| Xiao Wei Sun Baoquan Xiao Jinglin.TEMPERATURE DEPENDENCE OF THE SURFACE POLARON IN POLAR CRYSTALS[J].Chinese Journal of Luminescence,1993,14(3):253-264. |
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| Authors: | Xiao Wei Sun Baoquan Xiao Jinglin |
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| Institution: | Department of Physics, Inner Mongolia National Teacher''s College, Tongliao 028043 |
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| Abstract: | There is a weak bulk coupling but a strong surface coupling between the electrons and phonon for many polar crystals. In this paper, the influence of the electron interaction with both the weak coupling bulk longitudinal optical ( LO) and the strong coupling surface optical ( SO) phonons on the temperature characteristic of the surface polaron is discussed. The temperature dependences of the vibration frequency, the induced potential and the effective mass of the surface polaron are investigated by using a linear-combination-operator method. Numerical calculation, for AgBr crystal as an example, illustrates that the vibration frequency, the induced potential and the effective mass of surface polaron will decrease with increasing temperature. |
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| Keywords: | surface polaroni temperature dependence vibration frequency induced potential effective mass |
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