Abstract
We report a detailed experimental investigation of the magneto-optical properties of different excitonic complexes (neutral exciton, neutral biexciton, and charged exciton) confined in self-assembled GaAs/AlGaAs strain-free quantum dots grown by droplet epitaxy, where all piezoelectric effects are lacking. We measured the Land\`e $g$ factor and the diamagnetic coefficient $\ensuremath{\gamma}$ for several quantum dots spanning an interval of $\ensuremath{\sim}200\text{ }\text{meV}$ of the emission energy. The dependence of $g$ and $\ensuremath{\gamma}$ on quantum dot size and shape is discussed together with a comparison with Stranski-Krastanov and fluctuation-induced GaAs quantum dots, as well as with excitons confined in quantum wells.
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