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

O. Pilla·G. Viliani·R. DellAnna·G. Ruocco
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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.

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O. Pilla, G. Viliani, R. DellAnna, G. Ruocco. 1997-06-10. Low-frequency Raman scattering in model disordered solids: percolators above threshold. https://doi.org/10.1016/s0378-4371(97)00391-9

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