Orientational Ordering for System of Ellipsoidal Molecules Dispersed in Cubic Lattice

Abstract

We represent here some results for a model of migrating and nonmigrating ellipsoidal molecules dispersed in a cubic lattice, describing: the orientational ordering in nematícs, the possibility of a biaxial ordered liquid state, the orientational ordering in solid hydrogen (ortho-ΠI2 or ραrα-D2) or the orí-entatíonal glassy structure (the "higher rank" glass state). Through this kind of molecular ensemble (in the case of the system of ellipsoidal and spherical molecules) it is also possible to study the orientational and positional orderings in binary mixtures and to obtain the so-called plastic state.