Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2001-10-31
Phys. Rev. E 65, 026127 (2002)
Physics
Condensed Matter
Statistical Mechanics
5 pages, 3 figures, to be published in Phys. Rev. E
Scientific paper
10.1103/PhysRevE.65.026127
We studied the single dimer dynamics in a lattice diffusive model as a function of particle density in the high densification regime. The mean square displacement is found to be subdiffusive both in one and two dimensions. The spatial dependence of the self part of the van Hove correlation function displays as function of $r$ a single peak and signals a dramatic slow down of the system for high density. The self intermediate scattering function is fitted to the Kohlrausch-Williams-Watts law. The exponent $\beta$ extracted from the fits is density independent while the relaxation time $\tau$ follows a scaling law with an exponent 2.5.
Fusco Claudio
Gallo Paola
Petri Alberto
Rovere Marco
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