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Coupling between splay deformations and density modulations in splay-bend phases of bent colloidal rods

Anzivino, Carmine ; Van Roij, René ; Dijkstra, Marjolein

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Título:
Coupling between splay deformations and density modulations in splay-bend phases of bent colloidal rods
Autor: Anzivino, Carmine ; Van Roij, René ; Dijkstra, Marjolein
Assuntos: Condensed Matter Physics ; Statistical and Nonlinear Physics ; Statistics and Probability ; Taverne
Notas: Physical Review E 105(2), 1-5 (2022)
2470-0045
https://dspace.library.uu.nl/handle/1874/419877
Descrição: Using a grand-canonical Landau-de Gennes theory for colloidal suspensions of bent (banana-shaped) rods, we investigate how spatial deformations in the nematic director field affect the local density of twist-bend and splay-bend nematic phases. The grand-canonical character of the theory naturally relates the local density to the local nematic order parameter S. In the splay-bend phase, we find S and hence the local density to modulate periodically along one spatial direction. As a consequence the splay-bend phase has the key symmetries of a smectic rather than a nematic phase. By contrast we find that S and hence the local density do not vary in space in the twist-bend phase, which is therefore a proper nematic phase. The theoretically predicted one-dimensional density modulations in splay-bend phases are in agreement with recent simulations.
Data de criação/publicação: 2022
Idioma: Inglês

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