DOI: https://doi.org/10.30970/jps.01.232
A STUDY OF THE NEMATIC–ISOTROPIC PHASE TRANSITION IN LIQUID CRYSTALS BY MONTE CARLO SIMULATIONS OF LATTICE MODELS
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Journal of Physical Studies 1(2), 232–240 (1997)
DOI: https://doi.org/10.30970/jps.01.232 A STUDY OF THE NEMATIC–ISOTROPIC PHASE TRANSITION IN LIQUID CRYSTALS BY MONTE CARLO SIMULATIONS OF LATTICE MODELS |
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Ja. M. Ilnytskyi
Institute for Condensed Matter Physics of the Ukrainian Acad. Sci.
1 Svientsitskii Str., Lviv, UA-290011, Ukraine
The lattice models of the elongated molecules interacting via the Maier–Saupe and Berne–Pechukas potentials are investigated. The Monte Carlo simulation of such the systems is performed in the vicinity of the nematic–isotropic (NI) transition. The internal energy, heat capacity and scalar order parameter near transition are investigated. It is shown that for more elongated molecules the NI transition becomes of a stronger first order. The results are compared both with the results of other computer simulations and with the experimental data. It is shown that the behaviour of many nematics in the vicinity of the NI transition can be described by the proposed model with the elongation ratio of molecules from 3 to 5.