Enhancement by polydispersity of the biaxial nematic phase in a mixture of hard rods and plates
| Autor: | José A. Cuesta, Yuri Martínez-Ratón |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Biaxial nematic Statistical Mechanics (cond-mat.stat-mech) business.industry Matemáticas Dispersity General Physics and Astronomy Binary number Thermodynamics FOS: Physical sciences Condensed Matter - Soft Condensed Matter [PACS] Phase equilibria Rod [PACS] Transitions in liquid crystals Optics Phase (matter) [PACS] Theory and models of liquid structure Soft Condensed Matter (cond-mat.soft) business Condensed Matter - Statistical Mechanics Kappa Phase diagram |
| Zdroj: | e-Archivo. Repositorio Institucional de la Universidad Carlos III de Madrid instname |
| Popis: | The phase diagram of a polydisperse mixture of uniaxial rod-like and plate-like hard parallelepipeds is determined for aspect ratios $\kappa=5$ and 15. All particles have equal volume and polydispersity is introduced in a highly symmetric way. The corresponding binary mixture is known to have a biaxial phase for $\kappa=15$, but to be unstable against demixing into two uniaxial nematics for $\kappa=5$. We find that the phase diagram for $\kappa=15$ is qualitatively similar to that of the binary mixture, regardless the amount of polydispersity, while for $\kappa=5$ a sufficient amount of polydispersity stabilizes the biaxial phase. This provides some clues for the design of an experiment in which this long searched biaxial phase could be observed. Comment: 4 pages, 5 eps figure files, uses RevTeX 4 style |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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