IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Phase diagram of self-assembled rigid rods on two-dimensional lattices: Theory and Monte Carlo simulations
Autor/es:
LUIS G. LÓPEZ; DANIEL H. LINARES; ANTONIO J. RAMIREZ-PASTOR; SERGIO A. CANNAS
Revista:
JOURNAL OF CHEMICAL PHYSICS
Editorial:
AMER INST PHYSICS
Referencias:
Año: 2010 vol. 133 p. 134706 - 134706
ISSN:
0021-9606
Resumen:
Monte Carlo simulations and finite-size scaling analysis have been
carried out to study the critical behavior in a two-dimensional
system of particles with two bonding sites that, by decreasing
temperature or increasing density, polymerize reversibly into
chains with discrete orientational degrees of freedom and, at the
same time, undergo a continuous isotropic-nematic (IN) transition.
A complete phase diagram was obtained as a function of temperature
and density. The numerical results were compared with Mean Field
(MF) and Real Space Renormalization Group (RSRG) analytical
predictions about the IN transformation. While the RSRG approach
supports the continuous nature of the transition, the MF solution
predicts a first-order transition line and a tricritical point, at
variance with the simulation results.