2017/05/31 by M. P. Rosseto, R. R. Ribeiro de Almeida, Rosseto, M. P. +9
Engineering · Materials Science · Physics and Astronomy · #Advanced Materials and Mechanics #FOS: Physical sciences #Liquid Crystal Research Advancements #Soft Condensed Matter (cond-mat.soft) #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.1705.11176
openalex publication_date 2017/05/31 · openalex created_date 2017/06/05 · openalex updated_date 2026/07/28
The extended Frank elastic energy density is used to investigate the existence of a stable periodically modulate structure that appears as a ground state exhibiting a twist-bend molecular arrangement. For an unbounded sample, we show that the twist-bend nematic phase NTB is characterized by a heliconical structure with a pitch in the nano-metric range, in agreement with experimental results. For a sample of finite thickness, we show that the wave vector of the stable periodic structure depends not only on the elastic parameters but also on the anchoring energy, easy axis direction, and the thickness of the sample.