Two Dimensional Coulomb Potential of Confined Excitons in Quantum Well Structures

Authors M. Solaimani1, M. Izadifard1, H. Arabshahi2, M.R. Sarkardei3

1 Faculty of Physics, Shahrood University of technology, Shahrood, Iran

2 Physics Department, Payame Noor University, P. O. Box 19395-3697 Tehran, Iran

3 Physics Department, Al-Zahra University, Vanak, Tehran, Iran

Issue Volume 4, Year 2012, Number 4
Dates Received 09 October 2012; published online 29 December 2012
Citation M. Solaimani, M. Izadifard, H. Arabshahi, M.R. Sarkardei, J. Nano- Electron. Phys. 4 No 4, 04012 (2012)
PACS Number(s) 68.65.Fg, 71.35. – y
Keywords Trial wave functions, Two dimensional Coulomb potentials, Exciton binding energy (2) , Barrier thickness effect, Doping fraction effect.
In this study, we have investigated an exciton confined in a single quantum well. For the first time, we have compared the different methods of approximating the effective two dimensional Coulomb potentials which had been previously reported in the literatures. The effect of different previously introduced trial wave functions on the exciton binding energy is also investigated. In order to have a consistent and stable calculation we have tried to find the true region of variations for free parameters of these trial wave functions. Effects of the barrier thickness and doping fraction are also investigated.

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