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晶体中束缚光学极化子的声子平均数
引用本文:尹辑文,于毅夫,黄有利,肖景林.晶体中束缚光学极化子的声子平均数[J].内蒙古民族大学学报(自然科学版),2004,19(5):498-502.
作者姓名:尹辑文  于毅夫  黄有利  肖景林
作者单位:1. 内蒙古赤峰学院,物理系,内蒙古,赤峰,024000
2. 内蒙古民族大学,物理与机电学院,内蒙古,通辽,028043
基金项目:国家自然科学基金资助项目(10347004)
摘    要:研究晶体中束缚极化子的性质,采用Tokuda改进的线性组合算符、Lagrange乘子和变分法讨论了晶体中强、弱耦合极化子的振动频率和光学声子平均数与拉格朗日乘子u的关系,以RbCl晶体为例进行了数值计算,结果表面:束缚极化子的振动频率,基态能量和声子平均数随拉格朗日乘子u的增加而增大。

关 键 词:晶体  光学声子平均数  束缚光学极化子  束缚极化子  拉格朗日乘子  基态能量  线性组合算符  性质  振动频率  改进
文章编号:1671-0185(2004)05-0498-05
修稿时间:2003年12月14

The Mean Number of Phonons the Bound Optical Polaron in a Crystal
YIN Ji-wen,YU Yi-fu,HUANG You-li,XIAO Jing-lin.The Mean Number of Phonons the Bound Optical Polaron in a Crystal[J].Journal of Inner Mongolia University for the Nationalities(Natural Sciences),2004,19(5):498-502.
Authors:YIN Ji-wen  YU Yi-fu  HUANG You-li  XIAO Jing-lin
Institution:YIN Ji-wen~1,YU Yi-fu~1,HUANG You-li~2,XIAO Jing-lin~2
Abstract:In this paper, The properties of the bound optical polaron in a crystal is studied. The relation of vibrational frequency and mean number of phonons of both weak-and strong-coupling bound polaron in a crystal to Lagrange multiplier u are discussed by using Tokuda's improved linear combination operator ,the Lagrange multiplier and the unitary transformation methods.Numerical calculation for RbCl crystal , as an example, were performed and the results illustrates that the vibration frequency ,the ground state energy and the mean number of optical phonon of bound polaron will increase with increasing Lagrange multiplier u.
Keywords:Bound polaron  Vibration frequency  Mean number of phonon
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