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Excitons in a cylindrical GaAs Pöschl–Teller quantum dot
Author(s) -
MoraRamos M. E.,
Barseghyan M. G.,
Duque C. A.
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201046428
Subject(s) - exciton , quantum dot , biexciton , physics , symmetry (geometry) , quantum well , condensed matter physics , binding energy , effective mass (spring–mass system) , quantum mechanics , geometry , mathematics , laser
The exciton binding energy in a cylindrical quantum dot (QD) with Pöschl–Teller confining potential is studied with the use of the effective mass approximation and a variational calculation procedure. A GaAs prototype structure is particularly considered and both the spatially‐direct (DE) and spatially‐indirect (IE) exciton regimes are taken into account. We show that there is a significant effect of the Pöschl–Teller quantum well (QW) symmetry profile on the exciton properties in both configurations.