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Title

Simulation study of the phase behavior of a planar Maier-Saupe nematogenic liquid

AuthorsLomba, Enrique CSIC ORCID CVN ; Martín, C. CSIC; Almarza, Noé G. CSIC ORCID; Lado, Fred
KeywordsMaier-Saupe
liquid crystal
statistical mechanics
computer simulation
phase transitions
Issue Date22-Apr-2005
PublisherAmerican Physical Society
CitationPHYSICAL REVIEW E 71, 046132 (2005)
AbstractUsing extensive Monte Carlo simulations and a simple approximation in density functional theory, we study the phase behavior of a fluid of nematogenic molecules with centers of mass constrained to lie in a plane but with axes free to rotate in any direction, both with and without an external disorienting field perpendicular to the plane. We find that simulation predicts the existence of an order-disorder phase transition belonging to the Berezinskii-Kosterlitz-Thouless type, along with a low temperature gas-liquid transition. In contrast to the simulation results, density functional theory predicts a first-order orientational phase transition coupled continuously with a first-order gas-liquid transition. The approximate theoretical approach qualitatively reproduces the field dependence of the order-disorder and gas-liquid transitions but is far from quantitative. © 2005 The American Physical Society
Publisher version (URL)http://link.aps.org/doi/10.1103/PhysRevE.71.046132
URIhttp://hdl.handle.net/10261/26757
DOI10.1103/PhysRevE.71.046132
Appears in Collections:(IQFR) Artículos

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