Polaron effects on excitons in parabolic quantum wells: fractional-dimension variational approach

Z. P. Wang, X. X. Liang () and X. Wang

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 59, issue 1, 41-46

Abstract: 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/Al 0.3 Ga 0.7 As 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. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 71.35.-y Excitons and related phenomena; 71.38.-k Polarons and electron-phonon interactions (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00265-5

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