Spin properties of trions in a dense 2DEG

V. Kochereshko , Lucien Besombes (1) , Henri Mariette (1) , T. Wojtowicz (2) , G. Karczewski (2) , J. Kossut (2)

1 NEEL - NPSC - Nanophysique et Semiconducteurs
2 Institute of Physics

Reflectivity and photoluminescence spectra from CdTe/CdMgTe modulation-doped quantum well structures were studied. We have found that reflectivity spectra the value and the sign of the Zeeman splitting of the trion lines depend on the electron concentration in the quantum well, whereas, the value and sign of the exciton line splitting are constant for all studied electron-concentration. On the other hand, in the photoluminescence spectra the sign and value of the Zeeman splitting are the same for trion and exciton. Such "renormalization" of the trion g-factor is explained in the model of combined exciton-electron processes

Domaines: Physique [physics]

V. Kochereshko, Lucien Besombes, Henri Mariette, T. Wojtowicz, G. Karczewski, et al.. Spin properties of trions in a dense 2DEG. physica status solidi (b), 2010, 247 (6), pp.1531-1534. ⟨10.1002/pssb.200983187⟩. ⟨hal-00998497⟩