Slowing down of molecular rotation at the smectic-A→smectic-transition of liquid crystals
- 26 June 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 62 (26) , 3046-3049
- https://doi.org/10.1103/physrevlett.62.3046
Abstract
We report the first observation of the slowing down of molecular rotation around the long axis in the smectic-A phase of a ferroelectric liquid crystal. This effect, evidenced by degenerate four-wave mixing, is interpreted in terms of cooperative orientation of the transverse molecular axes, due to a coupling between the fluctuating ferroelectric order and the transient biaxial mode induced by the laser fields.Keywords
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