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| 纤锌矿结构混晶AlxGa1-xN中的光学声子和极化子 | |
| 引用本文： | 张芳,李艳,李伟,危书义.纤锌矿结构混晶AlxGa1-xN中的光学声子和极化子[J].天津师范大学学报(自然科学版),2013,33(3):35-38. |
| 作者姓名： | 张芳 李艳 李伟 危书义 |
| 作者单位： | 1. 平顶山学院电气信息工程学院,河南平顶山,467000 2. 河南城建学院数理系,河南平顶山,467000 3. 河南师范大学物理与信息工程学院,河南新乡,453007 |
| 基金项目： | 河南城建学院2013年度科学研究基金资助项目 |
| 摘 要： | 由于声子和极化子对纤锌矿结构混晶和由其组成的量子阱的物理性质存在重要影响,采用赝原胞模型法计算纤锌矿结构混晶中Γ点的光学声子频率与组分x的关系,运用微扰的方法计算纤锌矿结构混晶中极化子有效质量mi*和能量迁移Ei随组分x的变化关系.计算结果表明:纤锌矿结构混晶AlxGa1-xN中的LO声子和TO声子均表现为单模行为,极化子的有效质量mi*和能量迁移Ei随x的变化呈线性变化. |
| 关 键 词： | 赝原胞模型法 光学声子 极化子 纤锌矿结构混晶 AlxGa1-xN |
Optical phonon and polaron in wurtzite AlxGa1-xN ternary nitride-based crystal |
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| ZHANG Fang , LI Yan , LI Wei , WEI Shuyi.Optical phonon and polaron in wurtzite AlxGa1-xN ternary nitride-based crystal[J].Journal of Tianjin Normal University(Natural Science Edition),2013,33(3):35-38. | |
| Authors: | ZHANG Fang LI Yan LI Wei WEI Shuyi |
| Institution: | 1.College of Electric and Information Engineering,Pingdingshan University,Pingdingshan 467000,Henan Province,China;2.Department of Mathematics and Physics,Henan University of Urban Construction,Pingdingshan 467000,Henan Province,China;3.College of Physics and Information Engineering,Henan Normal University,Xinxiang 453007,Henan Province,China) |
| Abstract: | Phonons and polaron play an important role in physical properties of wurtzite ternary nitride-based crystals and quantum well composed of the crystals.The relationship between optical phonon frequencies at Γ point of the crystal and the concentration x is calculated by using the pseudo-unit-cell approach.The relationships of energy shifts and effective masses of a polaron in the system with x are calculated by using the perturbation method.The results show that A1 and E1 branches of optical phonons in wurtzite AlxGa1-xN exhibit one mode behavior,and energy shifts and effective masses of a polaron show approximately a linear relationship with the concentration x. |
| Keywords: | the pseudo-unit-cell approach optical phonons polaron wurtzite ternary nitride-based crystals AlxGa1-xN |
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