Magnetic properties of charged excitons in self-assembled quantum dots

4 páginas, 2 figuras.-- PACS 71.35.Ji, 78.55.Cr, 78.67.Hc.We report on low temperature (4.2 K) magneto-luminescence measurements performed on charged tuneable GaInAs self-assembled quantum dots. We mapped the magnetic field dispersion (0–9 Tesla) of the exciton with excess electron charges set from 0 to 3. For the doubly and triply charged excitons the emission line shows a doublet corresponding to the singlet and triplet configuration of the quantum dot in the final state after photon emission. We map here for the first time the dispersion of the singlet state of the doubly charged exciton and show that the triply charged exciton undergoes a transition resulting from a magnetic field induced frustration of the Hund's rule.This work was support by the German Research Foundation under the grant SFB 348, and by the Bavaria-California Technology center.Peer reviewe