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Low-frequency Raman scattering in model disordered solids: percolators above threshold

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  • Pilla, O.
  • Viliani, G.
  • Dell'Anna, R.
  • Ruocco, G.

Abstract

The Raman coupling coefficients of site- and bond-percolators at concentration higher than percolation threshold are computed for two scattering mechanisms: bond polarizability (BPOL) and dipole-induced-dipole (DID). The results show that DID does not follow a scaling law at low frequency, while in the case of BPOL the situation is less clear. The numerically computed frequency dependence in the case of BPOL, which can be considered a good scattering mechanism for a wide class of real glasses, is in semiquantitative agreement with experimental results.

Suggested Citation

  • Pilla, O. & Viliani, G. & Dell'Anna, R. & Ruocco, G., 1997. "Low-frequency Raman scattering in model disordered solids: percolators above threshold," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 247(1), pages 23-29.
    • Handle: RePEc:eee:phsmap:v:247:y:1997:i:1:p:23-29
    DOI: 10.1016/S0378-4371(97)00391-9
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    1. Corbacho, Juan Carlos Sola, 1994. "Familia y poder en Nueva España. Memoria del tercer Simposio de Historia de las Mentalidades. Seminario de Historia de las Mentalidades. Serie Historia, México, Instituto Nacional de Antropología e Hi," Revista de Historia Económica / Journal of Iberian and Latin American Economic History, Cambridge University Press, vol. 12(2), pages 443-448, September.
    2. Achibat, T. & Boukenter, A. & Duval, E. & Frick, B. & Garcia, N. & Serughetti, J., 1993. "Comparison between light and neutron inelastic scatterings. The frequency linear behaviour of the light-vibration coupling coefficient," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 201(1), pages 257-262.
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