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Critical behavior of the optical birefringence at the nematic to twist-bend nematic phase transition

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dc.abstract.enThe critical behavior at the transition from a uniform nematic to a twist-bend modulated nematic phase is revealed and shown to be well explained by the mean field approximation. The study was performed on a group of materials that exhibit an unusually broad temperature range of the nematic phase above the twist-bend modulated nematic phase, so the critical range in which the order parameter fluctuations are strong and can be experimentally observed is wide. The formation of instantaneous helices is observed already several degrees above the transition temperature, strongly influencing the birefringence of the system. The analysis of a critical part of the birefringence changes provides a set of critical exponents that are consistent with the mean field approximation, indicating a large correlation length of helical fluctuations in the nematic phase.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPociecha, Damian
dc.contributor.authorVaupotic, Nataša
dc.contributor.authorGórecka, Ewa
dc.contributor.authorStorey, John M. D.
dc.contributor.authorPaterson, Daniel A.
dc.contributor.authorImrie, Corrie T.
dc.contributor.authorCrawford, Catriona A.
dc.date.accessioned2024-01-24T20:55:10Z
dc.date.available2024-01-24T20:55:10Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.description.number5
dc.description.volume98
dc.identifier.doi10.1103/PHYSREVE.98.052706
dc.identifier.issn2470-0045
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/103945
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofPhysical review. E
dc.relation.pages52706
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleCritical behavior of the optical birefringence at the nematic to twist-bend nematic phase transition
dc.typeJournalArticle
dspace.entity.typePublication