球形GaAs量子点中心类氢杂质基态束缚能的研究
The Ground Binding Energy of a Center Hydrogenic Impurity in Spherical GaAs Quantum Dots
作者: 陈真梅 , 陈 妮 , 莫运海 , 吴智辉 , 袁建辉 ：广西医科大学物理教研室，广西 南宁; 张志海 ：盐城师范学院新能源与电子工程学院，江苏 盐城;
关键词: 球形量子点； 有限差分法； 类氢杂质； 能谱和束缚能； Quantum Dot； Finite Difference Method； Hydrogenic Impurity； Energy Spectra and Binding Energy
摘要:Abstract: The ground binding energy of a hydrogenic impurity in spherical GaAs quantum dots is investi-gated by using finite difference method. The electron bound in GaAs quantum dots can be viewed as a confined parabolic potential to the electron due to the parabolicity in the bottom of the conduction band of GaAs material. The results show that the ground binding energy of a hydrogenic impurity in spherical GaAs quantum dots closely depends on the radius of quantum dot and the parabolic potential parameter related to the conduction band. It is easily found that the ground binding energy of a hydrogenic impurity changes considerably with the increasing of the radius of quantum dot from a small radius. As the radius of quantum dot attains a certain value, the change of the radius of quantum dot has little impact on the ground binding energy of a hydrogenic impurity; however, the parabolic potential parameter can considerably change the ground binding energy of a hydrogenic impurity for a large of radius of quantum dot. This is the result of the coupling and competition between the confining widths of the well potential and parabolic potential.
文章引用: 陈真梅 , 陈 妮 , 莫运海 , 吴智辉 , 袁建辉 , 张志海 (2017) 球形GaAs量子点中心类氢杂质基态束缚能的研究。 现代物理， 7， 155-162. doi: 10.12677/MP.2017.74017
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