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采用Lee-Low-Pines(LLP)中间耦合变分法,研究了GaN/Al0.3Ga0.7N量子阱中束缚极化子基态能量、结合能和电子-声子相互作用对束缚极化子基态能量的贡献随阱宽的变化关系.数值计算中考虑了定域光学声子模和界面光学声子模.计算结果表明,纤锌矿GaN/Al0.3Ga0.7N量子阱中束缚极化子基态能量随着阱宽增大而降低;基态结合能随着阱宽的增大而增大,达到最大值后随阱宽的增大而减小.电子-声子相互作用对束缚极化子基态能量的贡献比较大,对结合能也有影响,使基态能量和结合能降低.纤锌矿结构中电子-声子相互作用对能量的贡献大于闪锌矿结构中的相应值.为了进行对比,计算了闪锌矿GaN/Al0.3Ga0.7N量子阱中束缚极化子的基态能量和结合能.
The ground-state energy, binding energy and electron-phonon interaction of the bound polaron in the GaN / Al0.3Ga0.7N quantum well are studied by the Lee-Low-Pines (LLP) Of the wurtzite GaN / Al0.3Ga0.7N quantum well, the contribution of the well is changed with the well width.The localized optical phonon modes and the interface optical phonon modes are taken into account in the numerical calculation.The results show that the ground state energy And decreases with the increase of well width. The binding energy of ground state increases with the increase of well width, reaches the maximum value, and decreases with the increase of well width.Electron-phonon interaction affects the ground state energy of the bound polaron Of the binding energy can also have an impact on the ground state energy and binding energy to reduce the wurtzite structure electron-phonon interactions contribute more energy to the sphalerite structure of the corresponding value.For comparison, calculated Ground State Energy and Binding Energy of Bound Polaron in Sphalerite GaN / Al0.3Ga0.7N Quantum Well.