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Related Experiment Video

Updated: Jul 11, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Freedericksz transition in an anticlinic liquid crystal

Zhang¹, Wen, Keast

¹Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA.

Physical Review Letters

|September 16, 2000

Summary

A surface-stabilized anticlinic liquid crystal shows a two-step transition to the synclinic phase under an electric field. This transition involves molecular rotations and solitary waves, revealing new liquid crystal dynamics.

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Area of Science:

Materials Science
Condensed Matter Physics
Liquid Crystal Physics

Background:

Surface-stabilized liquid crystals exhibit unique phase transitions.
Anticlinic phases display specific molecular ordering.
Electric fields are crucial for manipulating liquid crystal phases.

Purpose of the Study:

To experimentally investigate the electric-field-induced phase transitions in very-long-pitch, surface-stabilized, anticlinic liquid crystals.
To characterize the molecular behavior during these transitions.

Main Methods:

Experimental observation of liquid crystal behavior under varying electric fields.
Analysis of molecular reorientation and phase transitions.

Main Results:

A two-step electric-field-induced transition to the synclinic phase was observed.
Below a threshold field (E(th)), the liquid crystal remains undistorted.
Above E(th), a Freedericksz transition occurs with unequal azimuthal rotations in adjacent smectic layers.
At higher fields, solitary waves mediate the transition to the synclinic phase.

Conclusions:

The study elucidates a novel two-step transition mechanism in anticlinic liquid crystals driven by electric fields.
The findings highlight the role of molecular dynamics, including solitary waves, in phase transitions.