Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Acoustic Green Function For Superlattices
Author: Babiker M.
Tilley D.R.
Albuquerque E.L.
Goncalves Da Silva C.E.T.
Abstract: Classical response function theory is employed for the derivation of the displacement-gradient Green functions of a two-component superlattice. In particular, an exact result is derived for the Green function associated with acoustic waves whose wavevectors are perpendicular to the layers of the superlattice. This is shown to yield correct results for various known limiting cases. The characteristic spectrum includes contributions appropriate for the two bulk homogeneous samples plus multiple contributions. The latter follow a dispersion relation first derived by Rytov (1956), and arise from the folding of the Brillouin zone due to the macroscopic periodicity of the superlattice. The results are then discussed with reference to the GaAs-Ga1-xAlxAs superlattice for the case of small concentration parameter x. Explicit expressions are derived for this system in the case of equal thicknesses anticipating the application of the theory to light scattering by such superlattices. © 1985 The Institute of Physics.
Rights: fechado
Identifier DOI: 10.1088/0022-3719/18/6/021
Date Issue: 1985
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
2-s2.0-33744649981.pdf842.1 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.