量子阱中强耦合束缚极化子的性质  

Properties of the Bound Polaron in an Infinite Quantum Well

作　　者：李亚利[1] 蔡信乐[1] 

机构地区：[1]徐州师范大学物理与电子工程学院,江苏徐州221116

出　　处：《淮北师范大学学报（自然科学版）》2011年第4期28-32,共5页Journal of Huaibei Normal University：Natural Sciences

基　　金：国家自然科学基金资助项目(10347004)

摘　　要：运用改进的线性组合算符与变分相结合的方法,研究无限深量子阱中强耦合束缚极化子的性质.得到束缚极化子的基态能量和库仑束缚势、阱宽以及拉格朗日乘子的关系.通过数值计算结果表明:当库仑束缚势、阱宽和拉格朗日乘子增大时,基态能量的绝对值增大.The properties of the strong- coupling bound polaron in an infinite quantum well are studied by using variational method and the improved linear - combination - operator. The variational relation of the ground - state energy E0 of the bound polaron with the coulomb bound potential β, the electron- LO phonon coupling strength or, the well - width d and Lagrange multiplier u is derived. The results of numerical calculation show that the ground- state energy E0 will decrease with increasing the electron- LO phonon coupling strength or, the Coulomb bound potential/3, the well -width d and Lagrange multiplier u.

关 键 词：量子阱 线性组合算符 束缚极化子 基态能量 

分 类 号：O469[理学—凝聚态物理]