On dielectric screening matrix and localized potentials in diamomd type semiconductors

A necessary condition for a dielectric screening matrix to describe long range effects of a phonon-induced charge distortion is pointed out. It is also shown that the translational invariance of the system imposes an infinite set of sum rules on the dielectric matrix, which imply the acoustic sum ru...

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Bibliographic Details
Published in:Solid state communications 1973, Vol.12 (2), p.153-155
Main Author: Pindor, A.J.
Format: Article
Language:English
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Summary:A necessary condition for a dielectric screening matrix to describe long range effects of a phonon-induced charge distortion is pointed out. It is also shown that the translational invariance of the system imposes an infinite set of sum rules on the dielectric matrix, which imply the acoustic sum rule as a special case. On a indiqué la condition nécessaire pour que la matrice d'écrantage dielectrique décrive les effets a longue distance de la distortion de la charge induite par le phonon. On a aussi montré que l'invariance translationelle du système impose a la matrice d'écrantage dielectrique un ensemble infini des lois de somme qui impliquent la lois de somme acoustique comme cas particulier.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(73)90526-7