半导体束缚激子基态能的变尺度法  

The variable metric algorithm for ground state energy of ionized-donor-bound excitons in semiconductors

作　　者：闫海青[1] 唐晨[1] 张皞[1] 刘铭[1] 张桂敏[1] 

机构地区：[1]天津大学应用物理系,天津300072

出　　处：《物理学报》2004年第11期3877-3881,共5页Acta Physica Sinica

基　　金：天津大学 985教育振兴计划基金;南开大学 天津大学刘徽应用数学中心资助的课题~~

摘　　要：提出了计算体系基态能的变尺度法 ,用该算法计算了电子和空穴有效质量比值不同时 ,离子化施主束缚激子(D+ ,X)的基态能 .在求解体系基态能上与传统的变分法相比有很大的优势 。We present an optimization method, called the variable metric algorithm, to calculate the ground_state energies of excitons. The ground_state energies of two_dimensional ionized_donor_bound excitons (D +,X) have been calculated variationally for all values of effective electron_to_hole mass ratio σ. They are compared with those obtained by the variational method. The results show that the proposed method is simple in software programming, accurate, and has more advantages than the traditional variational method for the ground_state energies. The method is especially fitted for complex systems.

关 键 词：基态能 激子 有效质量 复杂体系 变分法 量比 施主 半导体 离子化 算法 

分 类 号：O471[理学—半导体物理]