Study of Blue-Phase III–Isotropic Phase Transition
In this paper, using the theories of Bogolyubov-Hellman-Feynman (BHF) and mean-spherical approximation, we get the system free energy within the four-order self-consistent cumulant expansion. According to the conditions of equilibrium state and self-consistent equation, we obtain the relation between reduced temperature and inverse correlation length and disscuss that the cubic invariant item is important in explaining BPIII to isotropic transition.
Yuan Ming Huang
R. Z. Wang et al., "Study of Blue-Phase III–Isotropic Phase Transition", Solid State Phenomena, Vols. 181-182, pp. 71-74, 2012