Observation of Pretransitional Divergence of Shear Viscosity near a Smectic-—Smectic-Phase Transition
- 12 February 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 42 (7) , 458-461
- https://doi.org/10.1103/physrevlett.42.458
Abstract
Strong pretransitional divergence of shear viscosity was observed for the first time near a smectic-—smectic- phase transition by capillary shear flow with the layer normal perpendicular to both the flow velocity and velocity gradient. The results are inconsistent with a single power-law type of critical exponent and are suggestive of an essential singularity. Possible implications of the results for recently proposed models of the smectic- phase and mechanisms for smectic-—smectic- phase transitions are discussed.
Keywords
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