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.
@article{arxiv.cond-mat/9706089,
title = {Low-frequency Raman scattering in model disordered solids: percolators above threshold},
author = {O. Pilla and G. Viliani and R. DellAnna and G. Ruocco},
journal= {arXiv preprint arXiv:cond-mat/9706089},
year = {2015}
}
Comments
10 pages, Revtex, 3 figures available from the authors, submitted to Physica A