Photon emission induced by elastic exciton--carrier scattering in semiconductor quantum wells

Simple item page
dc.creatorOuerdane, H.
dc.creatorVarache, R.
dc.creatorPortnoi, M. E.
dc.creatorGalbraith, I.
dc.date2005-09-19
dc.date2008-08-07
dc.date.accessioned2026-07-07T10:04:28Z
dc.date.available2026-07-07T10:04:28Z
dc.descriptionWe present a study of the elastic exciton--electron ($X-e^-$) and exciton--hole ($X-h$) scattering processes in semiconductor quantum wells, including fermion exchange effects. The balance between the exciton and the free carrier populations within the electron-hole plasma is discussed in terms of ionization degree in the nondegenerate regime. Assuming a two-dimensional Coulomb potential statically screened by the free carrier gas, we apply the variable phase method to obtain the excitonic wavefunctions, which we use to calculate the 1$s$ exciton--free carrier matrix elements that describe the scattering of excitons into the light cone where they can radiatively recombine. The photon emission rates due to the carrier-assisted exciton recombination in semiconductor quantum-wells (QWs) at room temperature and in a low density regime are obtained from Fermi's golden rule, and studied for mid-gap and wide-gap materials. The quantitative comparison of the direct and exchange terms of the scattering matrix elements shows that fermion exchange is the dominant mechanism of the exciton--carrier scattering process. This is confirmed by our analysis of the rates of photon emission induced by electron-assisted and hole-assisted exciton recombinations.
dc.descriptionThoroughly revised version of previous work. Weak and incorrect assumptions have been removed from the paper, and its scope has evolved: see abstract. This is the final version, i.e. as accepted for publication in the European Physical Journal B
dc.identifierhttps://arxiv.org/abs/cond-mat/0509492
dc.identifierhttp://arxiv.org/abs/cond-mat/0509492
dc.identifierThe European Physical Journal B vol. 65, p.195 (2008)
dc.identifierdoi:10.1140/epjb/e2008-00355-x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/169686
dc.subjectOther Condensed Matter
dc.titlePhoton emission induced by elastic exciton--carrier scattering in semiconductor quantum wells
dc.typetext

Files

Collections

arXiv