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• W2017949833 abstract "The phase diagram of hard-core nematogenic models in three-dimensional space can be studied by means of Onsager's theory, and, on the other hand, the critical properties of continuous interaction potentials can be investigated using the molecular field approach pioneered by Maier and Saupe. Comparison between these treatments shows a certain formal similarity, reflecting their common variational root; on this basis, hard-core potential models can be mapped onto continuous ones, via their excluded volume. Some years ago, this line of reasoning had been applied to hard spherocylinders, hence the continuous potential $G(ensuremath{tau})=a+bsqrt{1ensuremath{-}{ensuremath{tau}}^{2}},$ $b>0$ had been used to define a mesogenic model on a three-dimensional lattice [S. Romano, Int. J. Mod. Phys. B 9, 85 (1995)]; in the formula, $ensuremath{tau}$ denotes the scalar product between the two unit vectors defining particle orientations. Here we went on by addressing the same interaction potential on a two-dimensional lattice. Our analysis based on extensive Monte Carlo simulations found evidence of a topological transition, and the critical behavior in its vicinity was studied in detail. Results obtained for the present model were compared with those already obtained in the literature for interaction potentials defined by Legendre polynomials of second and fourth orders in the scalar product $ensuremath{tau}$." @default.
• W2017949833 created "2016-06-24" @default.
• W2017949833 creator A5035531152 @default.
• W2017949833 creator A5071998275 @default.
• W2017949833 date "2008-05-22" @default.
• W2017949833 modified "2023-10-18" @default.
• W2017949833 title "Topological transitions in two-dimensional lattice models of liquid crystals" @default.
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• W2017949833 doi "https://doi.org/10.1103/physreve.77.051704" @default.
• W2017949833 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18643084" @default.
• W2017949833 hasPublicationYear "2008" @default.
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