Distinctive features of pretransitional behaviour between nematic phases as revealed by DDM

Sebastián Ugarteche, Nerea (author), Cmok, Luka (author), Petelin, Andrej (author), Mandle, Richard J. (author), Mertelj, Alenka (author)

Pretransitional behaviour, with strong softening of the bend or splay elastic constants, is characteristic of two of the nematic to nematic phase transitions reported in the last decade. Such softening is strongly reflected in the pretransitional behaviour of the thermally excited director fluctuations. Here we give a comprehensive overview of the cross-Differential Dynamic Microscopy (c-DDM) method and its application to the investigation of thermal director fluctuations and phase transitions. For this, we build on the potentialities of the method for the investigation of the standard nematic phase of E7 to compare with the pretransitional behaviour of the nematic to twist bend nematic phase transition as well as the nematic to ferroelectric nematic transition.

• Language: English
• Keywords: thermal fluctuations, dynamic light scattering, cross-differential dynamic microscopy, nematic-nematic phase transitions
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: Str. 1047–1063
• Numbering: Vol. 51, no. 6
• PID: 20.500.12556/RUL-160341
• UDC: 53
• ISSN on article: 0267-8292
• DOI: 10.1080/02678292.2024.2322611
• COBISS.SI-ID: 187903491
• Publication date in RUL: 26.08.2024

Record is a part of a journal

• Title: Liquid crystals
• Shortened title: Liq. cryst.
• Publisher: Taylor & Francis
• ISSN: 0267-8292
• COBISS.SI-ID: 1690628

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: kompleksne snovi, fazni prehodi, toplotni tokovi