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三明学院 物理与机电工程系
收稿:2009-12-28,
修回:2010-6-7,
网络首发:2010-09-21,
纸质出版:2010-09-21
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郑冬梅, 王宗篪, 肖荣辉. 纤锌矿GaN柱形量子点中类氢施主杂质态[J]. 发光学报, 2010,31(5): 628-634
ZHENG Dong-mei, WANG Zong-chi, XIAO Rong-hui. Hydrogenic Donor Impurity States in a Cylindrical Wurtzite GaN Quantum Dot[J]. 发光学报, 2010,31(5): 628-634
在有效质量近似和变分原理的基础上
选取含两个变分参数的波函数
研究了纤锌矿结构的GaN/Al
x
Ga
1-
x
N单量子点中类氢施主杂质体系的结合能随量子点(QD)尺寸以及杂质在量子点中位置的变化
并与以前使用不同尝试波函数的计算结果进行了比较。结果表明:由我们选取的两变分参数波函数得到的结果与前人选取的两变分参数波函数得到的结果相比有所改进
而与选取一个变分参数波函数得到的结果一致。同时我们还计算了体系的维里定理值随量子点半径的变化情况
所得结果与前人工作结果一致
说明本文选取的两变分参数波函数能很好地描述柱形量子点中施主杂质态的运动。
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