Pk. Mukherjee et Tb. Mukherjee, CRITICAL REGION OF THE NEMATIC-ISOTROPIC PHASE-TRANSITION IN THE EPSILON EXPANSION, Physical review. B, Condensed matter, 52(14), 1995, pp. 9964-9969
The phase transition from isotropic liquid to nematic liquid crystal i
s a weak first-order one. We investigate the possibility of the critic
al region at the first-order transition line of the nematic-isotropic
phase transition in the context of epsilon (epsilon) expansion. We als
o investigate how the Landau-de Gennes theory of the nematic-isotropic
phase transition may break down at a first-order transition. When the
nematic-isotropic transition temperature T-NI is inside a critical re
gion, we find that the critical indices of the absolute stability limi
t of the nematic phase are beta(1)=beta (critical index of the critica
l point) and alpha(1)=gamma(1)=1-beta.