N维极性晶体中的慢速运动光学极化子

Slow Moving Optical Polarons in N-Dimensional Polar Crystals

本文用改进了的线性组合算符法讨论Ｎ维极性晶体中的慢速运动光学极化子．在强耦合和中间耦合（含弱耦合）极限下，导出了极化子的基态能量、有效质量以及围绕电子的平均虚声子数．在普适耦合范围内，给出了相应的数值计算结果．

The improved Linear Combination Operator method is adopted to study the ground state of a slow moving optical polaron in N-dimensional polar crystals. The analytical expressions of the ground state energy and effective mass of a polaron, average virtual phonon number around the electron are derived for both of strong and intermediate coupling(covering weak coupling ) limits. corre-sponding numerical results are also obtained for the whole coupling region.