| Autor: |
L. N. Carenza, G. Gonnella, D. Marenduzzo, G. Negro, E. Orlandini |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Physical Review Letters, 128(2):027801. AMER PHYSICAL SOC |
| ISSN: |
1079-7114 |
| Popis: |
We study the phase behavior of a quasi-two-dimensional cholesteric liquid crystal shell. We characterize the topological phases arising close to the isotropic-cholesteric transition and show that they differ in a fundamental way from those observed on a flat geometry. For spherical shells, we discover two types of quasi-two-dimensional topological phases: finite quasicrystals and amorphous structures, both made up of mixtures of polygonal tessellations of half-skynnions. These structures generically emerge instead of regular double twist lattices because of geometric frustration, which disallows a regular hexagonal tiling of curved space. For toroidal shells, the variations in the local curvature of the surface stabilizes heterogeneous phases where cholesteric patterns coexist with hexagonal lattices of half-skyrmions. Quasicrystals and amorphous and heterogeneous structures could be sought experimentally by self-assembling cholesteric shells on the surface of emulsion droplets. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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