Low Temperature Physics: 39, 28 (2013); https://doi.org/10.1063/1.4773928 (7 pages)
Configuration interaction in delta-doped heterostructures
I.V. Rozhansky1,2, N.S. Averkiev1, and E. Lähderanta2
1A.F. Ioffe Physical Technical Institute, Russian Academy of Sciences, St.Petersburg 194021, Russia
2Lappeenranta University of Technology, P.O. Box 20, Lappeenranta FI-53851, Finland
Received September 13, 2012
We analyze the tunnel coupling between an impurity state located in a δ-layer and the 2D delocalized states in the quantum well (QW) located at a few nanometers from the δ-layer. The problem is formulated in terms of Anderson–Fano model as configuration interaction between the carrier bound state at the impurity and the continuum of delocalized states in the QW. An effect of this interaction on the interband optical transitions in the QW is analyzed. The results are discussed regarding the series of experiments on the GaAs structures with a δ-Mn layer.
PACS: 75.75.–c Magnetic properties of nanostructures;
Key words: quantum wells, configuration interaction, paramagnetic impurities, delta-doping.