Lifshitz-Safran coarsening dynamics in a 2D hexagonal system.
The coarsening process in a two-dimensional hexagonal system in the region close to both spinodal and order-order transitions was investigated through the Cahn-Hilliard model. We found a distinctive region of the phase diagram where the pinning of dislocations plays only a minor role and the dynamics is led by the triple points. In this region, we found configurations of domains with the same features as those proposed by Lifshitz. As a consequence, different correlation lengths grow logarithmically in time, in good agreement with the predictions of coarsening at low temperatures proposed by Safran.
Gómez
Leopoldo R
LR
Planta Piloto de Ingeniería Química (UNS-CONICET), Camino La Carrindanga, KM 7, 8000 Bahía Blanca, Argentina.
Vallés
Enrique M
EM
Vega
Daniel A
DA