We investigate domain growth after a quench to the unstable region of the phase diagram on a lattice lacking translational invariance due to the presence of voids. The dynamical process is analyzed using a Ginzburg-Landau model with Langevin dynamics: studied numerically by means of a cell dynamical simulation in d = 2 for conserved order parameter at T-F = 0. We find that for short times ordering proceeds as on compact substrates (L(t) similar to t(1/3)); later on, when L(t) becomes comparable to the typical distance separating voids, coarsening occurs only via activated processes and for T-F = 0 the system Freezes out of equilibrium.

Coarsening in diluted systems

CORBERI, Federico;
1998-01-01

Abstract

We investigate domain growth after a quench to the unstable region of the phase diagram on a lattice lacking translational invariance due to the presence of voids. The dynamical process is analyzed using a Ginzburg-Landau model with Langevin dynamics: studied numerically by means of a cell dynamical simulation in d = 2 for conserved order parameter at T-F = 0. We find that for short times ordering proceeds as on compact substrates (L(t) similar to t(1/3)); later on, when L(t) becomes comparable to the typical distance separating voids, coarsening occurs only via activated processes and for T-F = 0 the system Freezes out of equilibrium.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/3136978
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