Orientational order in simple dipolar fluids: Density-functional theory and absolute-stability conditions
- 1 January 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 47 (1) , 506-512
- https://doi.org/10.1103/physreve.47.506
Abstract
The formation of ferroelectric liquid crystals by simple dipolar models is investigated using density-functional theory and absolute-stability analysis. It is emphasized that for such systems well-defined results can only be found by specifying exactly how the long-range dipolar interactions are treated. Explicit formal expressions are derived for mean-reaction-field boundary conditions and these are combined with integral-equation approximations in order to obtain numerical results for fluids of dipolar hard and soft spheres. The calculations predict isotropic-to-ferroelectric nematic transitions in qualitative agreement with computer simulations. The quantitative agreement, however, is rather poor.Keywords
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