title: Lifshitz-Safran coarsening dynamics in a 2D hexagonal system.
abstract: 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.
authors.affiliation: Planta Piloto de Ingeniería Química (UNS-CONICET), Camino La Carrindanga, KM 7, 8000 Bahía Blanca, Argentina.
authors.forename: Leopoldo R
authors.initials: LR
authors.lastname: Gómez
authors.forename: Enrique M
authors.initials: EM
authors.lastname: Vallés
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Vega