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Updated: Jul 3, 2026
07:03
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
Polarity-dependent dielectric torque in nematic liquid crystals
Mingxia Gu1, Sergij V Shiyanovskii, Oleg D Lavrentovich
1Chemical Physics Interdisciplinary Program, Liquid Crystal Institute, Kent State University, Kent, OH 44242, USA.
Physical Review Letters
|July 23, 2008
Summary
Dielectric dispersion in liquid crystals creates a "dielectric memory" effect. This memory influences dielectric torque, enabling faster switching dynamics in nematic liquid crystal displays.
Area of Science:
- Physics
- Materials Science
- Chemistry
Background:
- Dielectric dispersion in uniaxial nematic liquid crystals influences director switching dynamics.
- Dielectric torque depends on electric field, director orientation, and their historical values.
Purpose of the Study:
- To investigate the impact of dielectric memory on dielectric torque in liquid crystals.
- To demonstrate a novel contribution to dielectric torque that is polarity sensitive.
- To explore the potential of this torque for accelerating director dynamics.
Main Methods:
- Theoretical analysis of dielectric dispersion effects on liquid crystal director dynamics.
- Modeling the contribution of dielectric memory to dielectric torque.
- Simulating the influence of this torque on the switching-off phase.
Main Results:
- Dielectric memory introduces an unusual contribution to dielectric torque, linear in the electric field.
- This polarity-sensitive torque significantly affects director dynamics.
- The identified torque can accelerate the switch-off phase of director reorientation.
Conclusions:
- The
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