HYDROGENIC IMPURITY IN QUANTUM-WELL WIRES EFFECTS OF THE IMAGE CHARGES

被引：0
|
作者：
THOAI, DBT
机构：
来源：
SOLID STATE COMMUNICATIONS | 1992年 / 81卷 / 11期
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D O I：
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中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The ground state binding energy of a hydrogenic impurity placed on the axis of a cylindrical quantum-well wire is calculated including the effects of the image charges and the finite barrier. A variational ansatz for the wave function of the electron, that takes into account the three-dimensional behavior of the electron in small wires, has been used. Numerical results for GaAs-Ga1-xAlxAs quantum-well wires show that the effects of the image charges cause a considerable enhancement of the ground state binding energy of the impurity, especially in the case of high values of the Al composition and small wires.
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页码：945 / 947
页数：3
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