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STABILITY OF AN EXCITON BOUND TO AN IONIZED ACCEPTOR IN QUANTUM DOTS
https://doi.org/10.1142/S0217979203018053Cited by:6 (Source: Crossref)
Abstract
Binding energy for an exciton (X) bound in a parabolic two-dimensional quantum dot by an acceptor impurity A- located on the z-axis at a distance d from the dot plane, are calculated using the Hartree formalism with a recently developed numerical method (PMM) for the solution of the Schrödinger equation. As our analysis indicates there is a critical dot radius Rc such that for R < Rc the complex (A-, X) is unstable and with an increase of the impurity distance this critical radius increases. Furthermore, there is a critical value σc of the mass ratio 
such that for σ > σc the complex is stable.
PACS: 73.23.Ps, 73.35.Ji, 71.55.-i, 73.20.Dx, 71.55.Eq
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