电介质
杂质
凝聚态物理
量子
常量(计算机编程)
结合能
物理
原子物理学
量子力学
计算机科学
程序设计语言
作者
H.D. Karkı,S. Elagöz,R. Amca,P. Başer,K. Atasever
标识
DOI:10.1016/j.physe.2009.11.022
摘要
Abstract The ground state binding energy dependency of hydrogenic impurities on dielectric constant mismatch is investigated in cylindrical quantum wires as a function of wire radius and alloy concentration. The calculations are done for a cylindrical GaAs/Ga 1− x Al x As system with a uniform external magnetic field applied parallel to the wire axis using the effective mass approximation and variational methods for finite confinement potentials. According to the obtained results, one can ascertain that in calculating binding energies omitting the dielectric mismatch of the system is justified for large wire radii. However, there is a sign change in contribution for the binding energy for smaller wire radii. Furthermore, the magnitude of the contribution is more pronounced for smaller wire radii and larger alloy concentrations.
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