Partially confined excitons in semiconductor nanocrystals with a finite size dielectric interface
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
The combined effect of finite potential barriers and dielectric mismatch between dot and matrix on excitonic properties of semiconductor quantum dots has been studied. To avoid the unphysical divergence in the self-polarization energy which arises for the simplest and profusely adopted step-like model of the dielectric interface, we proposed a realistic (finite size) smooth profile for the dielectric interface. We have found that the excitonic binding energy can be either higher than the corresponding one to complete confinement by infinite barriers or essentially zero for a wide range of dot sizes depending on the thickness of the dielectric interface.
Cite
@article{arxiv.cond-mat/9909022,
title = {Partially confined excitons in semiconductor nanocrystals with a finite size dielectric interface},
author = {Pablo G. Bolcatto and Cesar R. Proetto},
journal= {arXiv preprint arXiv:cond-mat/9909022},
year = {2007}
}
Comments
11 pages, 6 figures, submitted to Phys. Rev. B jan/99