Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2000-09-15
European Phys. J. B 17(4), 661-666, 2000
Physics
Condensed Matter
Disordered Systems and Neural Networks
15 pages, 6 figures, to be pub. in EPJB
Scientific paper
10.1007/s100510070105
Low-frequency Raman and inelastic neutron scattering of amorphous bis-phenol A polycarbonate is measured at low temperature, and compared. The vibrational density of states and light-vibration coupling coefficient are determined. The frequency dependences of these parameters are explained by propagating vibration modes up to an energy of about 1 meV, and fracton-like modes in more cohesive domains at higher energies. The vibrational dynamics is in agreement with a disorder in the glass, which is principally of bonding or of elasticity instead of density.
Dianoux A. J.
Duval Eugene
Jal J. F.
Saviot Lucien
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