Magnetic properties of charged excitons in self-assembled quantum dots

• Published in: Physica Status Solidi (b) Vol. 238; no. 2; pp. 293 - 296
• Main Authors: Schulhauser, C., Högele, A., Warburton, R. J., Govorov, A. O., Schoenfeld, W., Garcia, J. M., Petroff, P. M., Karrai, K.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Berlin WILEY-VCH Verlag 01.07.2003; WILEY‐VCH Verlag; Wiley
• Subjects: 71.35.Ji; 78.55.Cr; 78.67.Hc; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures; Physics; Quantum dots; Gallium arsenides; Inorganic compounds; Quantum dots; Dispersion relations; Ternary compounds; Photoluminescence; Electron charge; Magnetic field effects; Binary compounds; Singlet state; Hund rule; Self-assembled layers; Experimental study; Indium arsenides; Triplet state; Excitons; Frustration; Trion
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/pssb.200303041

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.