纤锌矿GaN和AIN声子态的面间力常数模型在六角GaN/AIN超晶格中的应用(英文)

Planar Force-constant Model for Phonons in Wurtzite GaN and AIN: Application to Hexagonal GaN/AIN Superlattices

用面间力常数模型计算了（０００１）方向纤锌矿结构ＧａＮ与ＡＩＮ的纵向振动特性．并利用该模型对（０００１）方向生长的六角结构的ＧａＮ／ＡＩＮ超晶格的纵向声子态进行了研究．着重讨论了超晶格声子的限制效应．

A planar force-constant model is developed to calculate the longitudinal phonons propagating in the [0001]direction in wurtzite GaN and AIN. The proposed planar force-constant model is then applied to study the longitudinal phonon modes in hexagonal (0001)-oriented GaN/AIN superlattices. The confinement of the supperlattice phonons is stressed.