Collective Relaxation Processes in Nonchiral Nematics

Authors

Neelam Yadav, Trinity College Dublin, Ireland
Yuri Panarin, Technological University DublinFollow
Wanhe Jiang, University of Hull
Georg H. Mehl, University of Hull, UK
Jagdish Vij, Trinity College Dublin, Ireland

Author ORCID Identifier

https://orcid.org/0000-0002-7030-5614

Document Type

Article

Disciplines

Condensed matter physics

Publication Details

Crystals 2023, 13, 962. https://doi.org/10.3390/cryst13060962

Abstract

Nematic–nematic transitions in a highly polar nematic compound are studied, in thick cells in which the molecules are aligned parallel to the substrates but perpendicular to the applied electric field, using dielectric spectroscopy in the frequency range 1 Hz to 10 MHz over a wide temperature range. The studied compound displays three nematic phases under cooling from the isotropic phase: ubiquitous nematic N; high polarizability NX; and ferroelectric nematic NF. Two collective processes were observed. The dielectric strength and relaxation frequency of one of the processes P2 showed a dependence on the thickness of the cell. The process P1 is the amplitude mode, while the process P2 is the phason mode.

DOI

https://doi.org/10.3390/cryst13060962

Recommended Citation

Yadav, N.; Panarin, Y.P.; Jiang, W.; Mehl, G.H.; Vij, J.K. Collective Relaxation Processes in Nonchiral Nematics. Crystals 2023, 13, 962. DOI: 10.3390/cryst13060962

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.