Thickness dependent phase behavior of antiferroelectric liquid crystal films

Lidong Pan, Shun Wang, C. S. Hsu, C. C. Huang

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Free standing films of a liquid crystal compound with simple surface enhanced order were studied. The resultant phase diagram demonstrates that (1) the short helical pitch smectic-Cα* phase disappears below a film thickness of 10 layers, and (2)the temperature window of a distorted 4 layer smectic-CFI2* phase increases dramatically upon decreasing film thickness. The experimental findings were attributed to the reduced dimensionality and enhanced surface effects in thin films. The results of the smectic-Cα * phase are consistent with what have been reported for helically ordered magnetic thin films, with a noticeable difference due to the opposite effect of the surface on ordering in the two systems.

Original languageEnglish (US)
Article number187802
JournalPhysical review letters
Issue number18
StatePublished - Oct 30 2009


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