Dresden 2020 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 79: Quantum dots and wires IV
HL 79.4: Talk
Friday, March 20, 2020, 10:15–10:30, POT 151
Importance of the effect of correlation on the response of weakly confining QDs to applied magnetic field — •Petr Klenovský1,2,3, Diana Csontosová1,2, Daniel Huber4,5, and Armando Rastelli4 — 1Department of Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 267/2, 61137 Brno, Czech Republic — 2Central European Institute of Technology, Masaryk University, Kamenice 753/5, 62500 Brno, Czech Republic — 3Czech Metrology Institute, Okružní 31, 63800 Brno, Czech Republic — 4Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstr. 69, 4040 Linz, Austria — 5Secure and Correct Systems Lab, Linz Institute of Technology, Altenbergerstr. 69, 4040 Linz, Austria
We study magnetic field response of the charged and neutral excitonic states weakly confined in single GaAs/AlGaAs quantum dots obtained by the Al droplet-etching method. [1] Using direct comparison of the results of single-particle theory and the configuration interaction method, we show that the widely used single-particle Zeeman Hamiltonian cannot be used to extract reliable values of the g-factors and diamagnetic coefficients, nor to single out those for individual electrons and holes. The results are supported by extensive µ-photoluminescence measurements in Voigt and Faraday configurations of the applied magnetic field.
[1] Huber, D., et al., arXiv:1909.04906 (2019).