半导体量子阱中强耦合磁极化子的性质

首次采用线性组合算符结合改进的LLP幺正变换的方法，研究了电子与体纵光学声子强耦合情况下半导体量子阱中磁极化子的性质。导出了无限深量子阱中强耦合磁极化子的振动频率、基态能量和自陷能与阱宽和回旋共振频率的变化关系。对RbCl量子阱进行数值计算，结果表明：强耦合磁极化子的振动频率、基态能量和自陷能随回旋共振频率的增大而增大。振动频率和自陷能随阱宽的增加而增大；基态能量随阱宽的增加而减小，且在阱宽较窄时，表现出奇特的量子尺寸效应。

Properties of strong-coupling magnetopolaron in a semiconductor quantum well

With linear combination operator and variational method,the properties of strong-coupling magnetopolaron in a semiconductor quantum well axe studied.The relations between the vibration frequency,ground state energy and self-trapping energy of the strong-coupling magnetopolaron in an infinite quantum well with the well width or the cyclotron resonance frequency are derived.Numerical results of the RbCl quantum well show that the vibration frequency,ground state energy and self-trapping energy of the strong-coupling magnetopolaron increase with increasing the cyclotron resonance frequency when the well width is given.The vibration frequency and self-trapping energy increase with increasing the well width and finally approach to the three-dimensional(3D)value of the bulk material in a determinate cyclotron resonance frequency,but the ground state energy decreases with increasing the well width,and when the well width is small,the quantum size effect is significant.