Background impurities in a delta-doped QW. Part II: Edge doping
- 15 February 2021
- journal article
- research article
- Published by IOP Publishing in Semiconductor Science and Technology
- Vol. 36 (4), 045011
- https://doi.org/10.1088/1361-6641/abe65b
Abstract
This is the second part of our study of the background impurity influence on the intersubband energy structure of a single SiGe/Si/SiGe quantum well with the impurity delta layer within the well. By the background impurity we mean sparse shallow donor doping throughout the infinitely wide barriers. In this part we consider a situation when the delta layer is positioned near the edge of the well and the structure symmetry is broken. We explain in detail the necessary modifications of our self-consistent method that includes calculation of impurity binding energy. The results particularly show that the mentioned asymmetry provides new features to the effect of tuning the intersubband optical transitions by the ionization grade of the impurity in delta-layer that provides new technological possibilities.Keywords
This publication has 20 references indexed in Scilit:
- Background impurities and a delta-doped QW. Part I: Center dopingSemiconductor Science and Technology, 2019
- On some new effects in delta-doped QWsPhysica E: Low-dimensional Systems and Nanostructures, 2015
- On the possibility of tuning the energy separation between space-quantized levels in a quantum wellPhilosophical Magazine Letters, 2013
- The influence of the ionized impurity delta-layer potential in the quantum well on impurity binding energyJournal of Applied Physics, 2011
- Analytical expressions for asymmetric double quantum wells and their application to semiconductor heterostructuresPhilosophical Magazine, 2006
- Coherent and incoherent tunneling in asymmetric double quantum wellsSemiconductor Science and Technology, 1992
- Resonances in quantum mechanical tunnelingPhysics Letters B, 1985
- Influence of charged impurities on Si inversion-layer electronsPhysical Review B, 1982
- Hydrogenic impurity states in a quantum well: A simple modelPhysical Review B, 1981
- Space-Charge Effects on Electron TunnelingPhysical Review B, 1966