Discovery of a novel smectic-C{*} liquid-crystal phase with six-layer periodicity.
نویسندگان
چکیده
We report the discovery of a new smectic-C{*} liquid-crystal phase with six-layer periodicity by resonant x-ray diffraction. Upon cooling, the new phase appears between the SmC{alpha}{*} phase having a helical structure and the SmC{d4}{*} phase with four-layer periodicity. This SmC{d6}{*} phase was identified in two mixtures which have an unusual reversed SmC{d4}{*}-SmC{*} phase sequence. The SmC{d6}{*} phase shows a distorted clock structure. Three theoretical models have predicted the existence of a six-layer phase. However, our experimental findings are not consistent with the theories.
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ورودعنوان ژورنال:
- Physical review letters
دوره 104 2 شماره
صفحات -
تاریخ انتشار 2010