Competition between shape anisotropy and deformation in the ordering and close packing properties of quasi-one-dimensional hard superellipse fluids
Fuente:
arXiv
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915536315613184 |
|---|---|
| author | Mizani, Sakineh Oettel, Martin Gurin, Péter Varga, Szabolcs |
| author_facet | Mizani, Sakineh Oettel, Martin Gurin, Péter Varga, Szabolcs |
| contents | We investigate the orientational ordering and close-packing behavior of a quasi-one-dimensional (q1D) system
of hard superellipses, where the centers of the particles are confined to a line, but they can rotate freely within a
two-dimensional plane. The particle shape is tuned between an ellipse and a rectangle by varying the deformation
parameter (n). The elongation of the particle is changed using the aspect ratio (k). The pressure ratio between
freely rotating and parallel hard superellipses, which displays a single peak, serves as an effective marker for
the continuous structural change from quasi-isotropic to nematic ordering. Our findings reveal a competition
between the parameters k and n, with k promoting nematic alignment and n favoring tetratic ordering. Notably,
in the close-packing regime, the packing properties become independent of k, as the relevant exponents depend
solely on n. Furthermore, certain combinations of these exponents exhibit universality, remaining invariant with
respect to particle shape |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_18534 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Competition between shape anisotropy and deformation in the ordering and close packing properties of quasi-one-dimensional hard superellipse fluids Mizani, Sakineh Oettel, Martin Gurin, Péter Varga, Szabolcs Soft Condensed Matter We investigate the orientational ordering and close-packing behavior of a quasi-one-dimensional (q1D) system of hard superellipses, where the centers of the particles are confined to a line, but they can rotate freely within a two-dimensional plane. The particle shape is tuned between an ellipse and a rectangle by varying the deformation parameter (n). The elongation of the particle is changed using the aspect ratio (k). The pressure ratio between freely rotating and parallel hard superellipses, which displays a single peak, serves as an effective marker for the continuous structural change from quasi-isotropic to nematic ordering. Our findings reveal a competition between the parameters k and n, with k promoting nematic alignment and n favoring tetratic ordering. Notably, in the close-packing regime, the packing properties become independent of k, as the relevant exponents depend solely on n. Furthermore, certain combinations of these exponents exhibit universality, remaining invariant with respect to particle shape |
| title | Competition between shape anisotropy and deformation in the ordering and close packing properties of quasi-one-dimensional hard superellipse fluids |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2503.18534 |