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Absence of Definite Scaling Laws in Raman Scattering from Fractals | | P.Benassi
; O.Pilla
; G.Viliani
; G.Ruocco
; G.Signorelli
; V.Mazzacurati
; M.Montagna
; | | Date: |
30 Oct 1992 | | Abstract: | The frequency dependence of the Raman coupling coefficient $C(omega)$ is calculated numerically for square and cubic percolation clusters. No general scaling law in terms of the macroscopic parameters such as the fractal dimension $D$ or the spectral dimension $overline d$ is found. $C(omega)$ is sensitive to the microscopic structure of the clusters and depends on: site- or bond-percolation, presence or absence of dangling bonds, scattering mechanism and polarization, presence or absence of polarizability disorder. This situation makes the derivation of macroscopic parameters from Raman experiments unreliable. | | Source: | arXiv, cond-mat/9210027 | | Services: | Forum | Review | PDF | Favorites | |
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