Cd1-xMnxTe/CdTe量子阱中电子-LO声子散射率

J4 ›› 2017, Vol. 34 ›› Issue (1): 94-98.

Cd1-xMnxTe/CdTe量子阱中电子-LO声子散射率

陈莎¹,王海龙¹,陈丽¹,李正²,龚谦³,⁴

1 曲阜师范大学物理工程学院，山东曲阜 273165； 2 中国科学院上海微系统与信息技术研究所信息功能材料国家重点实验室,上海 200050

收稿日期:2015-10-26 修回日期:2015-11-17 出版日期:2017-01-28 发布日期:2017-01-28
通讯作者: 王海龙（1971-），山东莘县人，博士，教授，博士生导师，主要从事光通信与半导体光电子学方面的研究。 E-mail:hlwang@mail.qfnu.edu.cn(通信联系人)
作者简介:陈莎（1990-）,女，山东兖州人，研究生，主要从事低维半导体电子态的研究。 E-mail：csgyc58@163.com
基金资助:
国家自然科学基金The National Natural Science Foundation of China(批准号：61205055)，山东省自然科学基金The Natural Science Foundation of Shandong Province (批准号：ZR2014FM011)以及信息功能材料国家重点实验开放课题The Open Project of State Key Laboratory of Functional Materials for Informatics (批准号：SKL201307)资助

Electron-LO phonon scattering rate in Cd1-xMnxTe/CdTe quantum well

CHEN Sha1, WANG Hailong1, CHEN Li1, LI Zheng1, GONG Qian2

1 College of Physics and Engineering, Qufu Normal University, Qufu 273165, China; 2 State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

Received:2015-10-26 Revised:2015-11-17 Published:2017-01-28 Online:2017-01-28

摘要/Abstract

摘要： 基于费米黄金法则，理论计算了Cd1-xMnxTe/CdTe量子阱中第一激发态到基态的电子-LO声子的散射率，讨论了平均散射率随阱宽、温度及Mn组分的变化规律。结果表明：电子-LO声子的散射率随总初态能的增大逐渐减小；散射率和平均散射率随阱宽增大先增加后减小，最大值出现在20 nm阱宽附近，当阱宽大于等于20 nm时散射会发生”中断”；散射率和平均散射率随温度的增加逐渐增大，且温度较低时平均散射率的变化不明显，温度较高时明显增大；量子阱中电子-LO声子的平均散射率随Mn组分的增大逐渐减小。

关键词: 光电子学；散射率；费米黄金法则；Cd1-xMnxTe/CdTe量子阱；声子

Abstract: The electron-LO phonon scattering rate of the first excited state to the ground state in Cd1-xMnxTe/CdTe quantum well is calculated theoretically based on Fermi golden rule, and the variation of average scattering rate with the well width, temperature and Mn component is also discussed. Results show that the electron-LO phonon scattering rate decreases gradually with the increase of the total initial energy. The scattering rate and mean scattering rate increases up to their maxima which appears at 20 nm of the well width, then begin to decrease as the well width increases. When quantum well width is greater than 20 nm, the ‘cut-off’ will occur in scattering. The scattering rate and mean scattering rate increases monotonically with the increasing of temperature. In the case of low temperature, the variation of mean scattering rate is not obvious, but it increases distinctly when the temperature is relatively high. The mean scattering rate of electron-LO phonon in quantum well decreases with the increasing of Mn component.

Key words: optoelectronics; scattering rate; Fermi’s golden rule; Cd1-xMnxTe/CdTe quantum well; phonon

中图分类号:

0471.1

陈莎王海龙陈丽李正龚谦. Cd1-xMnxTe/CdTe量子阱中电子-LO声子散射率[J]. J4, 2017, 34(1): 94-98.

CHEN Sha1, WANG Hailong1, CHEN Li1, LI Zheng1, GONG Qian2. Electron-LO phonon scattering rate in Cd1-xMnxTe/CdTe quantum well [J]. J4, 2017, 34(1): 94-98.

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