稳恒电、磁场中量子阱内极化子的基态能量  

GROUND-STATE ENERGY OF THE POLARON IN A QUANTUM WELL WITHIN CONSTANT ELECTRIC AND MAGNETIC FIELDS

作　　者：黄卓和[1] 陈传誉[1] 陈芝得[1] 张树群[1] 

机构地区：[1]广州师范学院物理系,中国高等科学技术中心(世界实验室)理论物理分中心

出　　处：《物理学报》1994年第1期91-98,共8页Acta Physica Sinica

基　　金：国家自然科学基金

摘　　要：采用Ｌａｒｓｅｎ谐振子算符代数运算与变分波函数相结合的方法，研究处于与生长轴方向平行的稳恒电、磁场中量子阱内的电子——体纵光学声子相互作用系统。得到系统包括二级微扰修正的、作为量子阶宽度、电子－声子耦合常数以及电、磁场强度函数的基态能量表达式。结果表明：对电子基态能量的极化影响，随阱宽及电场强度的增大而减弱，而随磁场强度的增大而增强。In this paper,the system of the electron- bulk LO- phonon interaction in a qua-ntum well within constant electric and magnetic fields along the growth axis,isanalysed by the method of variational wave-function and harmonic oscillator operatoralgebra. The representation of the ground state energy which includes the correctionof the second-order perturbation is obtained as a funtion of the electron-LO-phononcoupling constant,the width of the quantum well,the strength of the electric and magnetic field.The results have shown that, the polaronic correction to electronground state energy reduces with increasing well width and electric field,but enha-nces with increasing magnetic field.

关 键 词：量子阱 极化子 声子 基态 

分 类 号：O413.1[理学—理论物理]