Lifshitz-Safran Coarsening Dynamics in a 2D Hexagonal System

LEOPOLDO R. GÓMEZ; ENRIQUE M. VALLÉS; DANIEL A. VEGA

PHYSICAL REVIEW LETTERS

Año: 2006 vol. 97 p. 1883021 - 1883024

0031-9007

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.