Single-particle-picture breakdown in laterally weakly confining GaAs quantum dots
| Autoři | |
|---|---|
| Rok publikování | 2019 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Physical Review B |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.235425 |
| Doi | http://dx.doi.org/10.1103/PhysRevB.100.235425 |
| Klíčová slova | quantum dots; magnetic field; configuration interaction |
| Popis | 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. |
| Související projekty: |