Open AccessCharged excitons in parabolic quantum-well wires under magnetic filed
Author(s) -
Hong Zhou,
Zhang Chun-Yuan,
Huiliang Zhang,
Jian Liu
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.077301
Subject(s) - exciton , binding energy , physics , harmonic oscillator , magnetic field , oscillator strength , electron , condensed matter physics , atomic physics , harmonic , quantum mechanics , spectral line
The binding energies of the charged excitons(negative X- and positive X+ excitons) are calculated using the finite-difference method within the quasi-one-dimensional effective potential model. The effects due to the magnetic filed and quantum confinements on the binding energy are analyzed, and the following results are obtained:(1) relative electron and hole harmonic oscillator confinement each have a strong effect on the stablity of charged excitons, the binding energy of X+ is not always larger than that of X-, e.g., due to the increase of the hole harmonic oscillator length, leading to the crossing of X+ and X- lines as recently observed experimentally;(2) the magnetic field leads to an increase of the binding energy, and the magnetic field dependence of the binding energy is related to the harmonic oscillator length.