介电常数失配和磁场对球形量子点中类氢杂质Binding Energy的影响
Effect of the Dielectric-Constant Mismatch and Magnetic Field on the Binding Energy of Hydrogenic Impurities in a Spherical Quantum Dot
摘要：
在有效质量近似和变分方法下，考虑了在有、无磁场作用下，尺寸量子化的半导体球、涂层和周围环境之间的介电常数失配对杂质结合能的影响。对GaAs-Ga_（1-x）Al_（x）As-AlAs（或真空）系统，得到了类氢中心杂质结合能与球半径、包层半径、合金浓度、介电常数失配和磁场强度的关系。
英文摘要：
Within the effective mass approximation and variational method the effect of dielectric constant mismatch between the size-quantized semiconductor sphere, coating and surrounding environment on impurity binding energy in both the absence and presence of a magnetic field is considered. The dependences of the binding energy of a hydrogenic on-center impurity on the sphere and coating radii, alloy concentration, dielectric-constant mismatch, and magnetic field intensity are found for the GaAs-Ga_(1-x)Al_(x)As-AlAs (or vacuum) system.
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