摘要
采用改进的LLP变分方法,研究纤锌矿氮化物无限深量子阱材料中束缚极化子基态能量和基态结合能、第一激发态能量和第一激发态结合能、第一激发态到基态的跃迁能量等物理量随着量子阱宽度的变化关系.研究结果表明,基态能量、第一激发态能量和结合能以及第一激发态到基态的跃迁能量随着阱宽的增大而减小,阱宽较小时,能量随阱宽下降的速度较快,之后来变得缓慢,最后接近GaN体材料中的三维值.研究还发现,在GaN/AlN量子阱中电子-声子相互作用对能量的贡献(41 meV)比在GaAs/AlAs量子阱中(3 meV)大得多.
The energy levels of bound polaron in the wurtzite nitride infinite quantum well are studied by using Lee-Low-Pines （LLP） transformation method. The ground state energy,the binding energy of the ground state, the first excited state energy, the binding energy of the first excited state, and the transition energies from the first excited state to the ground state are calculated as a function of well width （L）. The results indicate that the ground and first excited state energies, the corresponding binding energies, and the transition energy from the first excited state to the ground state rapidly decrease with increasing the well width at smaller L,but change slowly at larger L,and approach to the bulk value of GaN finally. It is also found that the contribution of electron-phonon interaction in GaN/AlN quantum well is very large, the value （about 41 meV） is much larger than that （about 3 meV） in GaAs/AlAs quantum well.
出处
《内蒙古师范大学学报（自然科学汉文版）》
CAS
2008年第5期628-631,637,共5页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(10364003)
关键词
纤锌矿
束缚极化子
结合能
跃迁能
wurtzite
bound polaron
binding energy
transition energy
