| 应变纤锌矿GaN/AlxGa1-xN柱形量子点中的束缚极化子 |
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| 引用本文： | 张彬,闫祖威,张敏.应变纤锌矿GaN/AlxGa1-xN柱形量子点中的束缚极化子[J].半导体学报,2011,32(6):062003-5. |
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| 作者姓名： | 张彬 闫祖威 张敏 |
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| 作者单位： | 内蒙古农业大学 理学院,内蒙古大学物理科学与技术学院 |
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| 摘 要： | 本文采用有效质量近似，考虑类LO声子，类TO声子以及内建电场的影响，利用变分法研究了应变GaN/AlxGa1-xN柱形量子点中的极化子效应。数值计算表明，极化子效应显著降低了杂质态的结合能。而且，类LO声子对结合能的贡献起主要作用，各向异性的角度和Al组分对结合能的影响则很小。
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| 关 键 词： | 量子点，电子-声子相互作用，束缚极化子，应变 |
| 修稿时间： | 2/7/2011 10:23:45 PM |
Bound polaron in a strained wurtzite GaN/AlxGa1-xN cylindrical quantum dot |
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| Zhang Bin,Yan Zuwei and Zhang Min.Bound polaron in a strained wurtzite GaN/AlxGa1-xN cylindrical quantum dot[J].Chinese Journal of Semiconductors,2011,32(6):062003-5. |
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| Authors: | Zhang Bin Yan Zuwei and Zhang Min |
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| Affiliation: | School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China;School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China;College of Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China;College of Physics and Electron Information, Inner Mongolia Normal University, Hohhot 010022, China |
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| Abstract: | Within the effective-mass approximation, a variational method is adopted to investigate the polaron effect in a strained GaN/AlxGa1-xN cylindrical quantum dot. The electron couples with both branches of longitudinal optical-like (LO-like) and transverse optical-like (TO-like) phonons and the built-in electric field are taken into account. The numerical results show that the binding energy of the bound polaron is reduced obviously by the polaron effect on the impurity states. Furthermore, the contribution of LO-like phonons to the binding energy is dominant, and the anisotropic angle and Al content influence on the binding energy are small. |
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