Stability of interacting electrons in a magnetic quantum dot

The possibility of confining two interacting electrons in a magnetic quantu m dot is investigated. Confinement is possible if the energy of two electro ns localised inside the dot is less than the energy of two non-interacting electrons; one localised in the centre of the dot and one localised an infi nite distance from the centre. Numerical results for a GaAs dot indicate re gions where confinement is possible as a function of magnetic dot radius an d confinement held strength. The confinement is enhanced if an external mag netic field is applied or in an InSb dot. Results for the electron density, pair distribution and pair correlation functions are also presented. (C) 1 998 Elsevier Science B.V. All rights reserved.