Polaron effects on excitons in parabolic quantum wells: fractional-dimension variational approach
Department of Physics, Inner Mongolia University, Hohhot, 010021, P.R. China
Corresponding author: a email@example.com
Revised: 3 August 2007
Published online: 5 October 2007
Polaron effects on excitons in parabolic quantum wells are studied theoretically by using a variational approach with the so-called fractional dimension model. The numerical results for the exciton binding energies and longitudinal-optical phonon contributions in GaAs/Al0.3Ga0.7As parabolic quantum well structures are obtained as functions of the well width. It is shown that the exciton binding energies are obviously reduced by the electron (hole)-phonon interaction and the polaron effects are un-negligible. The results demonstrate that the fractional-dimension variational theory is effectual in the investigations of excitonic polaron problems in parabolic quantum wells.
PACS: 71.35.-y – Excitons and related phenomena / 71.38.-k – Polarons and electron-phonon interactions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007