Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells

Intense electric fields applied to an asymmetric π-cell containing a nematic liquid crystal subjected to strong mechanical stresses induce distortions that are relaxed through a fast-switching mechanism: the order reconstruction transition. Topologically different nematic textures are connected by s...

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Autores principales:	Antonino Amoddeo, Riccardo Barberi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	nematic asymmetric cell nematic biaxiality order reconstruction nematic liquid crystals MMPDE FEM Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/e922296a9f7c48d9aaebb668079f2e9c
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id	oai:doaj.org-article:e922296a9f7c48d9aaebb668079f2e9c
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spelling	oai:doaj.org-article:e922296a9f7c48d9aaebb668079f2e9c2021-11-25T19:07:12ZPhase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells10.3390/sym131121562073-8994https://doaj.org/article/e922296a9f7c48d9aaebb668079f2e9c2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-8994/13/11/2156https://doaj.org/toc/2073-8994Intense electric fields applied to an asymmetric π-cell containing a nematic liquid crystal subjected to strong mechanical stresses induce distortions that are relaxed through a fast-switching mechanism: the order reconstruction transition. Topologically different nematic textures are connected by such a mechanism that is spatially driven by the intensity of the applied electric fields and by the anchoring angles of the nematic molecules on the confining plates of the cell. Using the finite element method, we implemented the moving mesh partial differential equation numerical technique, and we simulated the nematic evolution inside the cell in the context of the Landau–de Gennes order tensor theory. The order dynamics have been well captured, putting in evidence the possible existence of a metastable biaxial state, and a phase diagram of the nematic texture has been built, therefore confirming the appropriateness of the used technique for the study of this type of problem.Antonino AmoddeoRiccardo BarberiMDPI AGarticlenematic asymmetric cellnematic biaxialityorder reconstructionnematic liquid crystalsMMPDEFEMMathematicsQA1-939ENSymmetry, Vol 13, Iss 2156, p 2156 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nematic asymmetric cell nematic biaxiality order reconstruction nematic liquid crystals MMPDE FEM Mathematics QA1-939
spellingShingle	nematic asymmetric cell nematic biaxiality order reconstruction nematic liquid crystals MMPDE FEM Mathematics QA1-939 Antonino Amoddeo Riccardo Barberi Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells
description	Intense electric fields applied to an asymmetric π-cell containing a nematic liquid crystal subjected to strong mechanical stresses induce distortions that are relaxed through a fast-switching mechanism: the order reconstruction transition. Topologically different nematic textures are connected by such a mechanism that is spatially driven by the intensity of the applied electric fields and by the anchoring angles of the nematic molecules on the confining plates of the cell. Using the finite element method, we implemented the moving mesh partial differential equation numerical technique, and we simulated the nematic evolution inside the cell in the context of the Landau–de Gennes order tensor theory. The order dynamics have been well captured, putting in evidence the possible existence of a metastable biaxial state, and a phase diagram of the nematic texture has been built, therefore confirming the appropriateness of the used technique for the study of this type of problem.
format	article
author	Antonino Amoddeo Riccardo Barberi
author_facet	Antonino Amoddeo Riccardo Barberi
author_sort	Antonino Amoddeo
title	Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells
title_short	Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells
title_full	Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells
title_fullStr	Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells
title_full_unstemmed	Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells
title_sort	phase diagram and order reconstruction modeling for nematics in asymmetric π-cells
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e922296a9f7c48d9aaebb668079f2e9c
work_keys_str_mv	AT antoninoamoddeo phasediagramandorderreconstructionmodelingfornematicsinasymmetricpcells AT riccardobarberi phasediagramandorderreconstructionmodelingfornematicsinasymmetricpcells
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Phase Diagram and Order Reconstruction Modeling for Nematics in Asymmetric π-Cells

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