Unusual quantum confinement effects in ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Unusual quantum confinement effects in IV-VI materials
Author(s) :
Allan, Guy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Delerue, Christophe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Delerue, Christophe [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Journal title :
Materials Science and Engineering: C
Pages :
687-690
Publisher :
Elsevier
Publication date :
2005-12
ISSN :
0928-4931
English keyword(s) :
Quantum wells
Quantum dots
Nanocrystals
Dielectric constant
PbSe
Quantum dots
Nanocrystals
Dielectric constant
PbSe
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
The effect of quantum confinement in PbSe quantum wells and dots is studied using tight binding calculations. Compared to zinc-blende semiconductors, unusual physical properties are predicted for rock salt PbSe nanostructures. ...
Show more >The effect of quantum confinement in PbSe quantum wells and dots is studied using tight binding calculations. Compared to zinc-blende semiconductors, unusual physical properties are predicted for rock salt PbSe nanostructures. The energy gap increases as the inverse of the size both for wells and dots. For PbSe nanocrystals, the luminescence lifetime, the confinement energy and the intraband optical properties are in good agreement with experiments. The high quantum yield observed experimentally can be explained by the absence of surface dangling bonds in these systems. The full frequency-dependent dielectric function ɛ(ω) is calculated for PbSe quantum wells. Its imaginary part is strongly anisotropic and shows large variations with respect to its bulk value even far from the gap region.Show less >
Show more >The effect of quantum confinement in PbSe quantum wells and dots is studied using tight binding calculations. Compared to zinc-blende semiconductors, unusual physical properties are predicted for rock salt PbSe nanostructures. The energy gap increases as the inverse of the size both for wells and dots. For PbSe nanocrystals, the luminescence lifetime, the confinement energy and the intraband optical properties are in good agreement with experiments. The high quantum yield observed experimentally can be explained by the absence of surface dangling bonds in these systems. The full frequency-dependent dielectric function ɛ(ω) is calculated for PbSe quantum wells. Its imaginary part is strongly anisotropic and shows large variations with respect to its bulk value even far from the gap region.Show less >
Language :
Anglais
Popular science :
Non
Source :
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