Structural transformations of nematic disclinations.

Journal

The European physical journal. E, Soft matter

ISSN: 1292-895X

Titre abrégé: Eur Phys J E Soft Matter

Pays: France

ID NLM: 101126530

Informations de publication

Date de publication:
20 Sep 2022

Historique:

received: 19 05 2022

accepted: 13 08 2022

entrez: 20 9 2022

pubmed: 21 9 2022

medline: 21 9 2022

Statut: epublish

Résumé

Topological defects (TDs) are a consequence of symmetry breaking phase transitions and are ubiquitous in nature. An ideal testbed for their study are liquid crystals (LCs) owing to their large response to external stimuli and their large electrical and optical anisotropies. In this paper, we perform numerical simulations of topological defects of [Formula: see text] or [Formula: see text] enforced by the confining boundary. We use the Landau-de Gennes phenomenological model in terms of the tensor nematic order parameter and the Jones beam propagation model to simulate polarized optical microscopy images. We demonstrate the structure of closed disclination loops near the boundary known as boojums that can be topologically charged or chargeless. We show that pairs of chargeless disclination loops can interact repulsively or attractively depending on if they are arranged parallel or antiparallel, respectively. Sufficiently closely spaced antiparallel pairs can rewire while parallel pairs simply exhibit stronger bending due to the repulsion.

Identifiants

DOI: 10.1140/epje/s10189-022-00226-x PMID: 36125597

pubmed: 36125597

doi: 10.1140/epje/s10189-022-00226-x

pii: 10.1140/epje/s10189-022-00226-x

doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

Pagination

Subventions

Organisme : Javna Agencija za Raziskovalno Dejavnost RS

ID : P1-0099

Organisme : Javna Agencija za Raziskovalno Dejavnost RS

ID : PR-07585

Informations de copyright

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