基于MREI模型混晶光学声子频率计算理论的改进

J4 ›› 2010, Vol. 27 ›› Issue (5): 620-625.

基于MREI模型混晶光学声子频率计算理论的改进

罗飞¹, 郑瑞生², 卢敏¹, 刘维清¹

1 江西理工大学理学院，江西赣州 341000;
2 深圳大学光电子学研究所, 广东深圳 518060

收稿日期:2009-11-12 修回日期:2010-01-06 出版日期:2010-09-28 发布日期:2010-08-31
通讯作者: 郑瑞生（1958— ），男，教授，博士生导师，主要从事凝聚态物理理论研究、物理教学和工业自动化控制技术的开发和应用。 E-mail:rszheng@szu.edu.cn
作者简介:罗飞（1980— ），男，物理电子学专业硕士研究生，讲师，主要从事凝聚态物理方面的研究。E-mail: gzluofei@126.com.
基金资助:
国家自然科学基金理论物理专款博士启动基金(10947117)

Improved theory of calculating mixed crystals phonon frequencies based on MREI model

LUO Fei¹, ZHENG Ruisheng², LU Min¹, LIU Weiqing¹

1 Science College of Jiangxi University of Science and Technology, Ganzhou 341000, China;
2 Institute of Optoelectronics Shenzhen University, Shengzhen 518060, China

Received:2009-11-12 Revised:2010-01-06 Published:2010-09-28 Online:2010-08-31

摘要/Abstract

摘要：

在随机元素等位移（MREI）模型的基础上，进一步改进了模型。在计算多元混晶声子频率时，对不同模式采用了不同的次近邻常数，并且推算了近邻常数与组分x呈负幂指数变化的规律，从而不使用任何调节参数计算了几种AB1-xCx混晶的声子频率对组分x的依赖关系。理论结果和实验数据两者符合较好，对今后的实验给出了一定程度的指导。

关键词: 光电子学, MREI模型, 混晶, 光学声子, 组分

Abstract:

Based on the modified random-element isodisplacement (MREI) model, the theory is improved. The different second neighbor force constants are used to calculating the frequencies of optical phonons of the mixed crystals，and the first neighbor force constants can be evaluated to be a negative exponent variation with the composition x, thus the relationship between optical phonons frequencies and composition x of several AB1-xCx style mixed crystals has been calculated without any modulatory parameters. The theoretical results and the experimental datas meet well with each other, which give certain guidance to future experiments.

Key words: optoelectronics, MREI model, mixed crystals, optical phonon, composition

罗飞郑瑞生卢敏刘维清. 基于MREI模型混晶光学声子频率计算理论的改进[J]. J4, 2010, 27(5): 620-625.

LUO Fei ZHENG Ruisheng LU Min LIU Weiqing. Improved theory of calculating mixed crystals phonon frequencies based on MREI model[J]. J4, 2010, 27(5): 620-625.

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