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|Title:||Phase diagram exhibiting a smectic-A–smectic-C–smectic-F meeting point|
Shankar Rao, D.S.
Krishna Prasad, S.
|Publisher:||The American Physical Society|
|Citation:||Physical Review A, 1992, Vol.46, R726-728|
|Abstract:||We report an observation of a smectic-A–smectic-C–smectic-F (A-C-F) meeting point in a binary liquid-crystalline system. Detailed high-precision x-ray measurements enabled us to characterize the meeting point as a triple point, a point at which the three phases coexist. A direct consequence of this result is the existence of a tricritical point (TCP) on the A-C boundary. Contrary to the known results, the TCP appears despite a large temperature range for the A phase and the occurrence of a nematic phase at a higher temperature. Bearing in mind that F is a tilted hexatic phase, it is suggested that a possible reason for this behavior is the molecular-tilt field arising from the coupling between the tilt and the bond-orientational-order parameters.|
|Copyright:||(1992) by the American Physical Society|
|Appears in Collections:||Research Papers (SCM)|
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