中国物理B ›› 2011, Vol. 20 ›› Issue (12): 127301-127301.doi: 10.1088/1674-1056/20/12/127301
刘建军1, 张红2, 王学2, 赵剑锋2
Zhang Hong(张红)a)†, Wang Xue(王学)a), Zhao Jian-Feng(赵剑锋)a), and Liu Jian-Jun(刘建军)b)
摘要: The binding energy of a hydrogenic impurity in self-assembled double quantum dots is calculated via the finite-difference method. The variation in binding energy with donor position, structure parameters and external magnetic field is studied in detail. The results found are: (i) the binding energy has a complex behaviour due to coupling between the two dots; (ii) the binding energy is much larger when the donor is placed in the centre of one dot than in other positions; and (iii) the external magnetic field has different effects on the binding energy for different quantum-dot sizes or lateral confinements.
中图分类号: (Impurity and defect levels; energy states of adsorbed species)