Physics – Condensed Matter
Scientific paper
1999-11-29
Phys. Rev. E, 62 (2000) 2373
Physics
Condensed Matter
7 pages plus 4 postscript figures
Scientific paper
10.1103/PhysRevE.62.2373
We study the spectral width as a function of the external momentum for the dynamical structure factor of a disordered harmonic solid, considered as a toy model for supercooled liquids and glasses. Both in the context of single-link coherent potential approximation and of a single-defect approximation, two different regimes are clearly identified: if the density of states at zero energy is zero, the Rayleigh $p^4$ law is recovered for small momentum. On the contrary, if the disorder induces a non vanishing density of states at zero energy, a linear behaviour is obtained. The dynamical structure factor is numerically calculated in lattices as large as $96^3$, and satisfactorily agrees with the analytical computations.
Martin-Mayor Victor
Parisi Giorgio
Verrocchio Paolo
No associations
LandOfFree
The dynamical structure factor in disordered systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The dynamical structure factor in disordered systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The dynamical structure factor in disordered systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-414883