Renormalization of effective mass in self-assembled quantum dots due to electron-electron interactions

20th International Conference on the Application of High Magnetic Fields in Semiconductor Physics

Babinski, A.^1 ; Korkusinski, M.^2 ; Hawrylak, P.^2 ; Potemski, M.^3 ; Wasilewski, Z.R.^2

Faculty of Physics, University of Warsaw, ul. Hoza 69, 00-681 Warszawa, Poland^1

Quantum Theory Group Security, Disruptive Technologies Emerging Technologies Division NRC, 1200 Montreal Rd, Ottawa, ON K1A0R6, Canada^2

Laboratoire National des Champs Magnétiques Intenses, CNRS-UJF-UPS-INSA, avenue des Martyrs, 25, 38042 Grenoble, France^3

关键词: Cyclotron-effective mass;    Emission lines;    Energy splittings;    Magnetic field dispersion;    Renormalization;    Self assembled quantum dots;    Single particle;    Single quantum dot;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/456/1/012002/pdf
DOI  :  10.1088/1742-6596/456/1/012002

来源: IOP

【 摘 要 】

Magnetic-field dispersion of the multiexcitons related to the p shell of a single quantum dot (QD) is analysed in this work. The reduced cyclotron effective mass of carriers is determined from the energy splitting between the p+-and p - related multiexcitonic emission lines. The reduced mass in the occupied QD was found to be larger than the mass related to the QD's single particle structure. The apparent increase of the reduced mass with increasing excitonic occupation of the dot is related to the mass renoralization due to electron-electron interactions within a multiexcitonic droplet.