On the possibility of tuning the energy separation between space-quantized levels in a quantum well

Abstract

The idea about change of energy distances between space-quantized energy levels by ionization of an impurity delta layer situated within a quantum well (QW) is put forward and justified. The self-consistent solutions of Schrödinger, Poisson, and electroneutrality equations made for n-type SiGe/Si/SiGe rectangular QW show that the effect really exists and the most dramatic changes can be observed for an edge-delta-doped QW structure.

Keywords:

• Si/Ge
• quantum wells
• electronic structure

Acknowledgments

V. Tulupenko is very grateful to rector of Antioquia University, Medellín, Colombia, Prof. A. Uribe Correa for a given possibility to join University and good conditions for working for a period of 2 months. The authors are grateful for the fruitful discussions to Profs. O. Sarbey and V. Vainberg.