Confined optical phonon effects on the band gap renormalization in quantum wire structures
Author
Bennett, C. R.
Güven, K.
Tanatar, B.
Date
1999Source Title
Physica B : Condensed Matter
Print ISSN
0921-4526
Publisher
Elsevier Science
Volume
263-264
Pages
546 - 548
Language
English
Type
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Show full item recordAbstract
We consider the different approximations for the bandgap renormalization (BGR) within the random phase approximation (RPA), the quasi-static limit and the plasmon-pole approximation, and compare with the full result. We then include bulk optical phonons and also the phonon confinement using the phonons from the dielectric continuum (DC) model. We show that the results are very similar except at low densities where the quasi-static results overestimate the renormalization.
Keywords
Approximation theoryEnergy gap
Mathematical models
Phonons
Bandgap renormalization
Phonon confinement
Semiconductor quantum wires