极性晶体中强耦合激子与界面光学声子产生的自陷能  

The Self-trapping Energy Produced by the Interaction Between the Strong-coupling Exciton and IO Phonon in Polar Crystals

作　　者：杨洪涛[1] 冀文慧[1] 呼和满都拉[1] 

机构地区：[1]集宁师范学院物理系,内蒙古乌兰察布012000

出　　处：《集宁师范学院学报》2012年第4期101-104,共4页Journal of Jining Normal University

基　　金：内蒙古自治区高等学校科学研究项目"极化子效应对低维结构材料中强耦合激子性质的影响"(项目编号:NJZY11287)

摘　　要：采用线性组合和LLP变分相结合的方法研究了极性晶体界面强耦合激子的自陷能,得到了作为激子坐标和电子﹣空穴间距离函数的激子与界面光学(IO)声子相互作用产生的自陷能的表达式,进一步说明了极性晶体界面光学声子的重要性。The self-trapping energy of the strong-coupling interface exciton in a polar crystal is stunled by using a linear combination operator and the Lee-Low-Pines variational method, the expression of the self-trapping energy which is produced by the interaction between the exciton and interface-optical （IO） phonons is received as the function of the exciton coordinate and the distance between the electron and hole, and the influence of the IO phonon on the self-trapping energy in a polar crystal is confirmed.

关 键 词：界面光学声子 激子 强耦合 自陷能 

分 类 号：O469[理学—凝聚态物理]