Binding Energy of Donor States in a Quantum Dot with Parabolic Confinement

Details Binding Energy of Donor States in a Quantum Dot with Parabolic Confinement Binding Energy of Donor States in a Quantum Dot with Parabolic Confinement

2002-11-20

arxiv.org/abs/cond-mat/0211445v1

Physics

Condensed Matter

Materials Science

19 pages, 5 figures

Scientific paper

The donor binding energies associated with the ground state and a few excited states, are computed as a function of the dot size and the impurity position within two and three dimensional GaAs quantum dots. The calculation has been done using the Potential Morphing Method - a recently developed numerical method for the solution of time independent Schroedinger equation. The agreement with both perturbation and variational methods is very good, as regards the dependence of the binding energies on the dot size as well as on the location of the impurity within the quantum dot. Finally, we have shown that this method works well in all confinement limits - from weak to strong confinement.

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