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Updated: May 31, 2026
07:03
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Surface electroclinic effect near the first-order smectic-A*-smectic-C* transition
1Department of Physics, California Polytechnic State University, San Luis Obispo, California 93407, USA. ksaunder@calpoly.edu
Summary
The surface electroclinic effect (SECE) in smectic liquid crystals can be unusually strong due to first-order transitions. Varying enantiomeric excess can cause jumps in surface tilt, offering new ways to characterize de Vries materials.
Area of Science:
- Liquid Crystal Physics
- Materials Science
Background:
- The surface electroclinic effect (SECE) is a phenomenon observed in chiral smectic liquid crystals.
- Understanding SECE is crucial for developing advanced display technologies and optical devices.
Purpose of the Study:
- To analyze the SECE in materials with a first-order bulk smectic-A*-smectic-C* transition.
- To investigate the influence of enantiomeric excess on SECE.
- To explore the relationship between SECE, de Vries nature, and potential device applications.
Main Methods:
- Theoretical analysis of SECE in chiral smectic liquid crystals.
- Investigation of the impact of varying enantiomeric excess on surface-induced tilt.
- Analysis of the spatial decay of surface-induced tilt.
Main Results:
- SECE can be unusually strong in materials with first-order Sm-A*-Sm-C* transitions.
- A jump in surface-induced tilt is expected with variations in enantiomeric excess.
- A theoretical state map reveals a critical point terminating first-order discontinuities in surface tilt.
- The de Vries nature of the material enhances SECE, providing a new characterization method.
Conclusions:
- SECE offers a novel approach to characterize de Vries materials.
- The findings have implications for the design and application of liquid crystal devices.
- Experimental investigations are proposed to validate the predicted features of SECE.
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