Chiral structures and defects of lyotropic chromonic liquid crystals induced by saddle-splay elasticity
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- Chiral structures and defects of lyotropic chromonic liquid crystals induced by saddle-splay elasticity
- Davidson, Zoey S.; Kang, Louis; Jeong, Joonwoo; Still, Tim; Collings, Peter J.; Lubensky, Tom C.; Yodh, A. G.
- Issue Date
- AMER PHYSICAL SOC
- PHYSICAL REVIEW E, v.91, no.5, pp.1 - 5
- An experimental and theoretical study of lyotropic chromonic liquid crystals (LCLCs) confined in cylinders with degenerate planar boundary conditions elucidates LCLC director configurations. When the Frank saddle-splay modulus is more than twice the twist modulus, the ground state adopts an inhomogeneous escaped-twisted configuration. Analysis of the configuration yields a large saddle-splay modulus, which violates Ericksen inequalities but not thermodynamic stability. Lastly, we observe point defects between opposite-handed domains, and we explain a preference for point defects over domain walls
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