REACTION FIELD AND EWALD SUMMATION STUDY OF MESOPHASE FORMATION IN DIPOLAR GAY-BERNE MODEL

The phase transitions exhibited by systems described by the Gay-Berne model are studied when dipole-dipole interactions are present. The sys tem presents only an isotropic-smectic B transition at the reduced tem perature T = 1.25, whereas in the absence of dipolar interactions the system has isotropic-nematic-smectic B phases for the same temperatur e. The simulations were carried out with different simulation procedur es, showing that Monte Carlo in the NpT ensemble with the reaction fie ld is the most convenient.