摘要
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.
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.
基金
国家自然科学基金(批准号:10764003)
内蒙古自然科学基金(批准号:200607010105)资助项目~~
