论文部分内容阅读
根据介电连续模型和单轴晶体模型研究了纤锌矿量子阱中的界面声子模及其电声子相互作用的Fr?hlich哈密顿,我们计算和讨论了纤锌矿GaN/ZnO单量子阱中的界面声子的色散关系和电声子相互作用的耦合强度.色散曲线充分体现了纤锌矿晶体的各向异性;四支界面声子模出现在两个能量区域中,分别是:[ω_(⊥,TZnO,ω_(z,TGaN)]和[ω_(⊥,LZnO,ω_(z,LGaN)].界面声子的色散曲线随波数q;⊥的减小而消失,从而表明界面声子与其它声子模之间存在能量交迭区域.我们的结果也阐述了纤锌矿GaN/ZnO单量子阱中每支声子模与电子相互作用的对称性和耦合强度.
Based on the dielectric continuum model and the uniaxial crystal model, Fr? Hlich Hamiltonian of interface phonon modes in wurtzite quantum wells and its electro-phonon interaction was studied. We calculated and discussed the wurtzite GaN / ZnO single quantum The phonon dispersion in the well and the coupling strength of the electro phonon interaction.The dispersion curve fully reflects the anisotropy of the wurtzite crystal.The four interface phonon modes appear in two energy regions, The dispersion curves of the interface phonons disappear with the decrease of the wave number q; ⊥, which shows that the interface (⊥, TZnO, ω_ (z, TGaN)] and [ω_ (⊥, LZnO, ω_ (z, LGaN) The region of energy overlap exists between the phonons and the other phonon modes, and our results also illustrate the symmetry and coupling strength of each phonon interaction with the electrons in a wurtzite GaN / ZnO single quantum well.