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cond-mat.dis-nn1999
The Raman coupling function in amorphous silica and the nature of the long wavelength excitations in disordered systems
A. Fontana, R. Dell'Anna, M. Montagna +6
New Raman and incoherent neutron scattering data at various temperatures and molecular dynamic simulations in amorphous silica, are compared to obtain the Raman coupling coefficien…
cond-mat.dis-nn1998
High frequency sound waves in vitreous silica
R. Dell'Anna, G. Ruocco, M. Sampoli +1
We report a molecular dynamics simulation study of the sound waves in vitreous silica in the mesoscopic exchanged momentum range. The calculated dynamical structure factors are in…
cond-mat.dis-nn1997
Low-frequency Raman scattering in model disordered solids: percolators above threshold
O. Pilla, G. Viliani, R. DellAnna +1
The Raman coupling coefficients of site- and bond-percolators at concentration higher than percolation threshold are computed for two scattering mechanisms: Bond Polarizability (BP…