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.
C. FUSCO, P. GALLO, A. PETRI, & ROVERE M (2002). Stretched exponential relaxation in a diffusive lattice model. PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS, 65(2), 026127.
Titolo: | Stretched exponential relaxation in a diffusive lattice model |
Autori: | |
Data di pubblicazione: | 2002 |
Rivista: | |
Citazione: | C. FUSCO, P. GALLO, A. PETRI, & ROVERE M (2002). Stretched exponential relaxation in a diffusive lattice model. PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS, 65(2), 026127. |
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. |
Handle: | http://hdl.handle.net/11590/114948 |
Appare nelle tipologie: | 1.1 Articolo in rivista |