The case of missing incommensurate smectic A phases
作者:
Prem Patel,
Satyendra Kumar,
Paul Ukleja,
期刊:
Liquid Crystals
(Taylor Available online 1994)
卷期:
Volume 16,
issue 3
页码: 351-371
ISSN:0267-8292
年代: 1994
DOI:10.1080/02678299408029161
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Two binary mixtures of polar liquid crystal materials were previously reported to exhibit three incommensurate smectic A phases predicted for such materials on the basis of phenomenological theory. Results of our recent high-resolution X-ray scattering experiments show that no incommensurate phases exist in the two systems. Wide coexistence regions are found at first order transitions between various frustrated smectic phases of these mixtures. These regions were previously identified as the incommensurate smectic A phases. The phase diagrams of the two systems determined with high-resolution X-ray technique are shown to be in excellent agreement with Baroisa-Prost-Lubensky theory.
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