抛物量子阱中强耦合极化子的声子平均数  

Mean number of phonons of strong-coupled polaron in a parabolic quantum well

作　　者：高宽云[1] 邢海峰[1] 

机构地区：[1]内蒙古财经大学计算机信息管理学院,内蒙古呼和浩特010070

出　　处：《量子电子学报》2016年第5期635-640,共6页Chinese Journal of Quantum Electronics

摘　　要：采用线性组合算符和幺正变换相结合的变分方法,研究了抛物量子阱中强耦合极化子的声子平均数,给出了抛物量子阱中强耦合极化子的声子平均数与量子阱受限强度和电子-体纵光学声子耦合强度的关系.结果表明:强耦合极化子的声子平均数随量子阱受限强度、电子-体纵光学声子耦合强度的增大而增大;随量子阱受限强度的减小,声子平均数趋于晶体材料的值;抛物量子阱受限强度和耦合强度的增大加强了电声子之间的相互作用。The mean number of phonons of strong-coupled polaron in a parabolic quantum well is investigated by using the variational method combing the linear combination operator and unitary transformation.The relationships among the mean number of phonons of strong-coupled polaron in a parabolic quantum well,confinement strength of quantum well and electron-longitudinal optical phonons coupling strength are derived.Results show that the mean number of phonons of the strong-coupled polaron increases with increasing of quantum well confinement strength and electron-longitudinal optical phonons coupling strength.The mean number of phonons tends to be result of the crystalline material wit decreasing of the quantum well confinement strength.The interaction of the electron and phonons is enhanced with increasing of the confined strength and coupling strength of parabolic quantum well.

关 键 词：材料 声子平均数 线性组合算符 幺正变换 强耦合极化子 抛物量子阱 

分 类 号：O469[理学—凝聚态物理]