Nematic-Smectic--Smectic-Transitions in Systems of Parallel Hard Molecules
- 28 November 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (22) , 2566-2569
- https://doi.org/10.1103/physrevlett.61.2566
Abstract
The phase diagram for liquid-crystal models of hard molecules is studied by use of a nonlocal density functional for the free energy. Nematic, smectic-, and smectic- phases can be obtained from purely packing effects without any attractive interaction. A system of parallel hard spherocylinders shows a continuous phase transition from the nematic to a smectic- phase, in good agreement with existing computer simulations. In a system of parallel oblique cylinders we predict first- or second-order phase transitions between the smectic- and the smectic- phases.
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