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PreprintCC BY 4.0arXiv

Insight into ordering at nematic twist-bend interfaces

  • Szymon Drzazga
  • Piotr Kubala
  • Lech Longa
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Abstract

Twist-bend nematics formed by achiral particles support heliconical domains of opposite handedness. Using Monte Carlo and molecular dynamics simulations of repulsive bent particles, we study the interface between two such domains. Rather than a gradually untwisting texture, we find a density-modulated splay-bend-twist structure. The density modulation is along the helix axis with a period of approximately half the bulk pitch, while the twist is locally enhanced in magnitude, alternates in sign, and vanishes only on an undulating surface. An explicit director interpolation shows how gradients along the helix axis and across the interface combine to produce an undulating zero-twist surface.

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Cite

BibTeXRIS
BibTeX
@misc{drzazga2026insight,
  title = {{Insight into ordering at nematic twist-bend interfaces}},
  author = {Szymon Drzazga and Piotr Kubala and Lech Longa},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.28012},
  eprint = {2609.28012},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.28012},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Insight into ordering at nematic twist-bend interfaces
AU  - Szymon Drzazga
AU  - Piotr Kubala
AU  - Lech Longa
PY  - 2026
DA  - 2026/09/23
PB  - arXiv
DO  - 10.48550/arxiv.2609.28012
UR  - https://arxiv.org/abs/2609.28012
AB  - Twist-bend nematics formed by achiral particles support heliconical domains of opposite handedness. Using Monte Carlo and molecular dynamics simulations of repulsive bent particles, we study the interface between two such domains. Rather than a gradually untwisting texture, we find a density-modulated splay-bend-twist structure. The density modulation is along the helix axis with a period of approximately half the bulk pitch, while the twist is locally enhanced in magnitude, alternates in sign, and vanishes only on an undulating surface. An explicit director interpolation shows how gradients along the helix axis and across the interface combine to produce an undulating zero-twist surface.
ER  -