Ferroelectric Nematic-Isotropic Liquid Critical End Point

Phys Rev Lett. 2023 May 26;130(21):216802. doi: 10.1103/PhysRevLett.130.216802.


A critical end point above which an isotropic phase continuously evolves into a polar (ferroelectric) nematic phase with an increasing electric field is found in a ferroelectric nematic liquid crystalline material. The critical end point is approximately 30 K above the zero-field transition temperature from the isotropic to nematic phase and at an electric field of the order of 10 V/μm. Such systems are interesting from the application point of view because a strong birefringence can be induced in a broad temperature range in an optically isotropic phase.