Publication details

Single-particle-picture breakdown in laterally weakly confining GaAs quantum dots

Authors

HUBER Daniel LEHNER Barbara Ursula CSONTOSOVÁ Diana REINDL Marcus SCHULER Simon COVRE DA SILVA Saimon Filipe KLENOVSKÝ Petr RASTELLI Armando

Year of publication 2019
Type Article in Periodical
Magazine / Source Physical Review B
MU Faculty or unit

Faculty of Science

Citation
Web https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.235425
Doi http://dx.doi.org/10.1103/PhysRevB.100.235425
Keywords quantum dots; magnetic field; configuration interaction
Description We present a detailed investigation of different excitonic states weakly confined in single GaAs/AlGaAs quantum dots obtained by the Al droplet-etching method. For our analysis we make use of temperature-, polarization-, and magnetic-field-dependent u-photoluminescence measurements, which allow us to identify different excited states of the quantum dot system. Besides that, we present a comprehensive analysis of g-factors and diamagnetic coefficients of charged and neutral excitonic states in Voigt and Faraday configuration. Supported by theoretical calculations by 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 of the constituent particles from excitonic transition measurements.
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