作　　者： ; ; ;

机构地区： 内蒙古大学物理科学与技术学院

出　　处： 《Journal of Semiconductors》 2008年第5期841-844,共4页

摘　　要： 采用分维变分方法讨论了有限深抛物量子阱中束缚极化子的束缚能,得到了束缚能随阱宽的变化关系,并给出了声子对束缚能的贡献随阱宽的变化曲线.数值计算的结果表明,束缚极化子的束缚能随阱宽的增大存在一极大值,电子-声子的相互作用使束缚极化子的束缚能显著降低,声子的贡献不可忽略. The binding energy of a bound polaron in a finite parabolic quantum well is studied theoretically by a fractional- dimensional variational method. The numerical results for the binding energies of the bound polaron and longitudinal-optical phonon contributions in GaAs/Al0.3 Ga0.7 AS parabolic quantum well structures are obtained as functions of the well width. It is shown that the binding energies of the bound polaron are obviously reduced by the electron-phonon interaction and the phonon contribution is observable and cannot be neglected.

关 键 词： 束缚极化子 束缚能 抛物量子阱

领　　域： [理学] [理学]