Examination of Appearance of Biaxial Nematic Phase for the Rod-Disc Mixtures using Symmetry Breaking Potential Method
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概要
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The nematic-isotropic (N-Iso) phase transitions in mixtures of hard rod-like and disc-like molecules are studied by the mean field theory. We use the symmetry breaking potential method for the mixtures examining stability of biaxial nematic phase Denoting the volume of a rod-like molecule and a disc-like molecule as V_R and V_D, respectively. We consider symmetric case of V_R / V_D = 1, and asymmetric cases of V_R / V_D < 1 and V_R / V_D > 1. In our present study, the two types of uniaxtal nematic phases, optically positive (N^+) and negative (N^-) are appeared Biaxial nematic phase (N_b) is always less stable than N^+ and N^- phases. When aspect ratio and volume of disc-like molecules are large enough, the re-entrance of Iso + N^- co-existence region is indicated in a phase diagram.
- 社団法人日本物理学会の論文
- 2003-09-15
著者
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Imada Shin
Faculty Of Engineering Science Osaka University
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国府田 隆夫
東京大学・工
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国府田 隆夫
日本女子大学理学部数物科学科
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木村 初男
名古屋大学
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Imada Shin
Division Of Materials Physics Graduate School Of Engineering Science Osaka University
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Ikeda Shin-ichi
Nanoelectronics Research Institute Aist
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Ikeda Susumu
Graduate School Of Science And Engineering Yamagata University
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KODA Tomonori
Faculty of Engineering, Yamagata University
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IKEDA Susumu
Faculty of Engineering, Yamagata University
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MATSUDA Hiromitsu
Faculty of Engineering, Yamagata University
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Kimura Hatsuo
Faculty Of Engineering Yamagata University
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Koda Tomonori
Faculty Of Engineering Yamagata University
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木村 初男
Institute Of Materials Structure Science High Energy Accelerator Research Organization (kek)
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Matsuda Hiromitsu
Faculty Of Engineering Yamagata University
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Koda Tomonori
Department Of Polymer Science And Engineering Yamagata University
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Ikeda Susumu
Faculty Of Engineering Yamagata University
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