Charged excitons or trions in 2D parabolic quantum dots?

TL;DR

This paper clarifies the distinction between charged excitons and trions in 2D parabolic quantum dots, analyzing their energies and effects of magnetic fields using the Hartree-Fock method.

Contribution

It demonstrates that charged excitons and trions have different behaviors in 2D quantum dots, providing detailed calculations of their energies and the influence of magnetic fields.

Findings

Charged excitons and trions exhibit different binding energy behaviors.

External magnetic fields affect the binding energies of charged excitons.

The ratio of electron to hole confinement influences their energies.

Abstract

So far in the literature the terms "charged exciton" and "trion" are often confused with each other and mostly considered as the same. In this work we show this is not the case in 2D quantum dots with a parabolic confinement. By using the unrestricted Hartree-Fock method the energy and binding energy of both charged excitons and trions in 2D parabolic quantum dots are calculated in dependence on the confinements of charge carriers in quantum dot. It is shown that the binding energies of the charged exciton and the trion behave differently in regard to the ratios of the confinements between the electron and hole. The effect of the external magnetic field on the binding energies of charged excitons has been also considered.