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Critical adsorption at the free surface of a smectic liquid crystal possessing a second-order phase transition

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Bahr,  Christian
Group Structure formation in soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Bahr, C., Booth, C. J., Fliegner, D., & Goodby, J. W. (1996). Critical adsorption at the free surface of a smectic liquid crystal possessing a second-order phase transition. Physical Review Letters, 77(6), 1083-1086. doi:10.1103/PhysRevLett.77.1083.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-B9A9-1
Abstract
The surface-induced molecular tilt near the second-order smectic-A (untilted)–smectic-C (tilted) transition is studied in freely suspended films consisting of hundreds of molecular layers. As the bulk transition temperature Tc is approached from above, the overall amount of the surface-induced tilt, which is far above Tc restricted to a few molecular layers near the surface, grows in a divergencelike behavior. The experimental results are compared with the Fisher–de Gennes model of critical adsorption.