Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/98456
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.
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Rights: fechado
Identifier DOI: 10.1088/0022-3719/18/6/021
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-33744649981&partnerID=40&md5=4cb0921132bb87f38c695d69a0899004
Date Issue: 1985
Appears in Collections:Unicamp - Artigos e Outros Documentos

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