Numéro
J. Phys. IV France
Volume 06, Numéro C8, Décembre 1996
ICIFUAS 11
Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
Page(s) C8-675 - C8-677
DOI https://doi.org/10.1051/jp4:19968146
ICIFUAS 11
Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids

J. Phys. IV France 06 (1996) C8-675-C8-677

DOI: 10.1051/jp4:19968146

Computer Simulation of Vibration Spectrum in Disordered Systems

Z.C. Shen

International Centre for Materials Physics, Academia Sinaca, Sheng Yang 110015, Suzhou Professional University, Suzhou, 215002, China


Abstract
The disordered systems are of fractal structures. Alexander and Orbach showed that the vibrational density of states for fractal nets follows the unïversal law : D(w)≈wd- -where d- is the spectral (fracton) dimensionality ; d-=4/3 for any Euclidean dimension d. The excitations belonging to this class were named "fractons". We have employed a novel numerical method developed by Williams et al. and performed computer simulation. We have pointed out that the connection between the vibration spectrum and the ultrasonic attenuation in sintered metal powders.



© EDP Sciences 1996