Binding energy of a donor impurity in GaAs δ-doped systems under electric and magnetic fields, and hydrostatic pressure

被引：11
|
作者：
Mora-Ramos, M. E. [2 ]
Gaggero-Sager, L. M. [2 ]
Duque, C. A. [1 ]
机构：
[1] Univ Antioquia, Inst Fis, Medellin 1226, Colombia
[2] Univ Autonoma Estado Morelos, Fac Ciencias, Cuernavaca 62209, Morelos, Mexico
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2012年 / 44卷 / 7-8期
关键词：
QUANTUM-WELL; SIMPLE-MODEL; TRANSPORT; SUPERLATTICES; LAYERS; GAS;
D O I：
10.1016/j.physe.2012.02.014
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The problem of the impurity binding energy in GaAs n-type delta-doped systems is studied taking the field effect transistor as an archetypical structure. The theoretical investigation considers the effects of externally applied electric and magnetic fields as well as of hydrostatic pressure. The description of the one-dimensional potential profile is made including Hartree and exchange effects via a Thomas-Fermi-based local density approximation. The allowed energy levels are calculated within the effective mass and envelope function approximations by means of an expansion over an orthogonal set of infinite well eigenfunctions. The results for the impurity binding energy are presented also for different configurations of the impurity position within the system. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：1335 / 1341
页数：7
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