IFISUR   23398
INSTITUTO DE FISICA DEL SUR
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Pattern formation and coarsening in crystalline membranes
Autor/es:
DANIEL A. VEGA; PEZZUTTI A
Lugar:
Chicago
Reunión:
Congreso; MAR11 Meeting of The American Physical Society; 2011
Institución organizadora:
APS
Resumen:
We study through a Brazovskii-Helfrich Hamiltonian the process of defect formation, an- nealing and coarsening of two dimensional crystalline membranes. In good agreement with the cosmological model of Kibble and Zurek, pro- posed to determine the density of topological defects at the onset of a symmetry breaking phase transition, we found that the collision of orien- tationally uncorrelated domains produces a structure of grains with an average density of topological defects controlled by the temperature of the quench. The strain ¯eld of the dislocations and disclinations gener- ated during the phase separation process can induce the buckling of the membrane, slowing down the Lifshitz-Safran mechanism of coarsening observed in flat systems.