Smectic- Cα* -smectic- C* phase transition and critical point in binary mixtures

Z. Q. Liu, S. T. Wang, B. K. McCoy, A. Cady, R. Pindak, W. Caliebe, K. Takekoshi, K. Ema, H. T. Nguyen, C. C. Huang

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We have investigated the smectic- Cα* -smectic- C* (Sm Cα* -Sm C*) transition in a series of binary mixtures with resonant x-ray diffraction, differential optical reflectivity, and heat capacity measurements. Results show that the phases are separated by a first-order transition that ends at a critical point. We report the observation of such a critical point. We have proposed the appropriate order parameter and obtained values of two critical exponents associated with this transition. The values of the critical exponents suggest that long-range interactions are present in the Sm Cα* -Sm C* critical region.

Original languageEnglish (US)
Article number030702
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number3
StatePublished - 2006


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