Polaron Energy Level in Wurtzite MgxZn1-xO/Mg0.3Zn0.7O Parabolic Quantum Well

ZHANG Guo-qing; ZHAO Feng-qi; ZHANG Chen-hong

doi:10.3788/fgxb20133410.1300

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Polaron Energy Level in Wurtzite Mg_xZn_1-xO/Mg_0.3Zn_0.7O Parabolic Quantum Well

更新时间：2020-08-12

- Polaron Energy Level in Wurtzite Mg_xZn_1-xO/Mg_0.3Zn_0.7O Parabolic Quantum Well
- Chinese Journal of Luminescence Vol. 34, Issue 10, Pages: 1300-1305(2013)
- 作者机构：
  
  内蒙古师范大学物理与电子信息学院, 内蒙古呼和浩特 010022
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133410.1300
  CLC： O471.3;O472+.3
- Received：22 May 2013，
  
  Revised：30 July 2013，
  
  Published：10 October 2013
- 稿件说明：
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张国庆, 赵凤岐, 张晨宏. 纤锌矿MgxZn1-xO/Mg0.3Zn0.7O抛物量子阱中极化子能级[J]. 发光学报, 2013,34(10): 1300-1305

ZHANG Guo-qing, ZHAO Feng-qi, ZHANG Chen-hong. Polaron Energy Level in Wurtzite MgxZn1-xO/Mg0.3Zn0.7O Parabolic Quantum Well[J]. Chinese Journal of Luminescence, 2013,34(10): 1300-1305
张国庆, 赵凤岐, 张晨宏. 纤锌矿MgxZn1-xO/Mg0.3Zn0.7O抛物量子阱中极化子能级[J]. 发光学报, 2013,34(10): 1300-1305 DOI： 10.3788/fgxb20133410.1300.

ZHANG Guo-qing, ZHAO Feng-qi, ZHANG Chen-hong. Polaron Energy Level in Wurtzite MgxZn1-xO/Mg0.3Zn0.7O Parabolic Quantum Well[J]. Chinese Journal of Luminescence, 2013,34(10): 1300-1305 DOI： 10.3788/fgxb20133410.1300.

摘要

采用改进的Lee-Low-Pines(LLP)中间耦合方法研究纤锌矿Mg

O/Mg

0.3

0.7

O抛物量子阱材料中的极化子能级

给出极化子基态能量、跃迁能量(第一激发态到基态)和不同支长波光学声子对电子态能级的贡献随量子阱宽度

的变化规律。理论计算中考虑了纤锌矿Mg

O/Mg

0.3

0.7

O抛物量子阱材料中声子模的各向异性和介电常数、声子(类LO和类TO)频率等随空间坐标

变化(SD)效应对极化子能量的影响。结果表明

O/Mg

0.3

0.7

O抛物量子阱中电子与长波光学声子相互作用对极化子能级的移动很大

使得极化子能量明显降低。阱宽较小时

半空间长波光学声子对极化子能量的贡献较大

而定域长波光学声子的贡献较小;阱宽较大时

情况则正好相反。在

的变化范围内

电子与长波光学声子相互作用对极化子能级的移动(约67~79 meV)比Al

As/Al

0.3

0.7

As抛物量子阱中的相应值(约1.8~3.2 meV)大得多。因此

讨论ZnO基量子阱中电子态问题时要考虑电子与长波光学声子的相互作用。

Abstract

The energy levels of polaron in a wurtzite Mg

O/Mg

0.3

0.7

O parabolic quantum well are investigated by adopting a modified Lee-Low-Pines variational method. The ground state energy

the transition energy and the contributions of different branches of optical phonon modes to the ground state energy as functions of the well width

are given. The effects of the anisotropy of optical phonon modes(like-LO and like-TO)and the spatial dependence effective mass

dielectric constant

phonon frequency on energy levels are considered in theoretical calculation. The results indicate that the contributions of the electron-optical phonon interaction to polaron energy shift in Mg

O/Mg

0.3

0.7

O parabolic quantum well are very large

which make the energy of polaron reduce. For a narrower quantum well

the contributions of half-space optical phonon modes is large

and the contributions of the confined optical phonon modes is small

while for a wider one

the case is contrary. In the region of

the contributions of the electron-optical phonon interaction to polaron energy shift in wurtzite Mg

O/Mg

0.3

0.7

O (about from 67 to 79 meV) are greater than that of Al

As/Al

0.3

0.7

N parabolic quantum well (about from 1.8 to 3.2 meV). Therefore

the electron-optical phonon interaction should be considered in studying electron state in ZnO based quantum well.

关键词

Keywords

references

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