Properties of the discotic-nematic to isotropic transition: influence of short range orientational order |
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| Authors: | Kalyan Singh Shri Singh T K Lahiri |
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| Institution: | 1. Department of Solid State Physics (Electronics), Dr. R. M. L. Awadh University, Faizabad, India;2. Department of Physics, Banaras Hindu University, Varanasi 221005, India;3. Central Hindu School, Kamachha, Banaras Hindu University, Varanasi, India |
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| Abstract: | The present investigation concerns the analysis of the influence of short range orientational correlation on the thermodynamic properties of discotic-nematic liquid crystals. Two-site cluster approximation is applied to the orientational molecular coordinates to include the short range orientational correlation. The role of short range orientational order, dispersion interaction, molecular length-to-width ratio and pressure on the thermodynamic and orientational behaviour of discotic nematogens close to the discotic-nematic to isotropic transition are analysed. It is observed that the short range orientational order has a strong influence on the thermodynamic properties and that the transition properties of both the calamitic and discotic mesogens exhibit quite similar behaviour. |
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