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.