摘要
采用Lee-Low-Pines(LLP)变分法研究纤锌矿量子阱材料中电子-声子相互作用有关问题,给出纤锌矿GaN/AlxGa1-xN和InxGa1-xN/GaN量子阱材料中极化子基态能量和第一激发态到基态的跃迁能量随量子阱宽度和材料组分的变化关系.研究中考虑了纤锌矿量子阱材料中光学声子模各向异性以及声子频率随波矢的变化关系.同时还对运用LLP变分方法计算极化子能量时所采用的几种不同处理方法进行了分析和讨论,并给出相应的数值计算结果.
The problem related to the interaction between the electron and phonons in wurtzite quantum well structures are studied by using modified Lee-Low-Pines（LLP） variational method.The ground state energy and the first excited state to ground state transition energy of polaron in wurtzite（zinc-blende） GaN/AlxGa1-xN and InxGa1-xN/GaN wurtzite quantum well as functions of the well width and composition are given.The anisotropy of optical phonon modes and the relation of the phonon frequency changing with vector are considered in the investigation.Meanwhile,The several different methods of culcalating the polaron energy problems by using LLP methods in transformation process are analyzed and discussed,and the corresponding nummerical results are given.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2012年第2期133-139,共7页
Materials Science and Technology
基金
国家自然基金(10964007)资助项目
内蒙古自然基金资助项目(2009MS0110)
内蒙古自治区高等学校科学研究项目(NJ09026)
关键词
纤锌矿
量子阱
极化子
wurtzite
quantum well
polaron
