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 a 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, C., Gallo, P., Petri, A., Rovere, M. (2002). Stretched exponential relaxation in a diffusive lattice model. PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS, 65(2), 026127 [10.1103/PhysRevE.65.026127].

Stretched exponential relaxation in a diffusive lattice model

P. GALLO;ROVERE, Mauro
2002-01-01

Abstract

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 a 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, C., Gallo, P., Petri, A., Rovere, M. (2002). Stretched exponential relaxation in a diffusive lattice model. PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS, 65(2), 026127 [10.1103/PhysRevE.65.026127].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/114948
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