Abstract
We derive a simple model for the estimates of the orbital-pair interaction in self-assembled dots and show that many-body interactions between all orbital pairs for a few electrons are determined in a first approximation by the classical Coulomb interaction between the first two electrons. The estimated values are within 35% of the accurate results derived from local density functional theory. We extend the model to electrostatically defined planar quantum dots and find a better agreement (20%). This is a result of the weakening of the individual orbital-pair interactions with the number of electrons in the dot caused by the screening of the confining potential.
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