Reentrant ferroelectricity in liquid crystals.

Structure and Dynamics of Reentrant Nematics: Any Open Questions after Almost 40 Years?

Liquid crystals have attracted enormous interest because of the variety of their phases and richness of their application. The interplay of general physical symmetries and specific molecular features generates a myriad of different phenomena. A surprising behavior of liquid crystals is the reentrancy of phases as temperature, pressure, or concentration are varied. Here, we review the main exper...

Properties and Applications of Ferroelectric Liquid Crystals

The ferroelectric modes of liquid crystals which allow for easy reorientation of the direction of polarization make liquid crystals an attractive element to use for applications such as optical storage, and optical switching. Three schemes for achieving ferroelectricity are discussed: chiral smectic alignment, achiral “banana-shaped” smectic alignment, and the nematic phase that comes from stro...

Reentrant nematic and columnar phases in disc-like liquid crystals at atmospheric pressure

2014 We describe the first example of reentrant ND nematic and Dr columnar mesophases at atmospheric pressure in a pure disc-like compound. J. Physique LETTRES 42 (1981 ) L-417 L-419 15 SEPTEMBRE 1981, Classification Physics Abstracts 61.30 64.70E

Dielectric relaxation in liquid crystals exhibiting a reentrant phenomenon

Generalization of Meyer’s ferroelectricity to cholesteric phase : electroclinic coupling and prediction of a new ferrocholesteric phase

We present a generalization of Meyer's theory of the trilinear coupling between the smectic layers, the tilt angle of the optical axis with respect to the layer normal and the electric polarization which accounts for the spontaneous ferroelectricity in smectic C* liquid crystals. This coupling allows for the description of the electroclinic effect, I-ethe appearance of a polarization and a tilt...