Twist modulated phases in chiral smectic liquid crystals

Jonathan J. Stott; Rolfe G. Petschek

doi:10.1103/PhysRevE.60.1799

Twist modulated phases in chiral smectic liquid crystals

Jonathan J. Stott, Rolfe G. Petschek

Fairfield University

Research output: Contribution to journal › Article › peer-review

Abstract

By considering short period helical planar modulations about the layer normal, we construct a model free energy for the ferriclinic phases observed in chiral smectic liquid crystals. We then use this free energy to construct the phase diagram for our model. The resulting phases are compared with the experimentally observed smectic-C* subphases (ferroclinic, antiferroclinic, and heliclinic). A strong coupling is found between the ferroclinic q=2π/a and the heliclinic q=2π/3a modes. This coupling was not considered in previous models. The resulting additional stability of this “locked in” phase is discussed.

Original language	American English
Journal	Physical Review E
Volume	60
DOIs	https://doi.org/10.1103/PhysRevE.60.1799
State	Published - Jan 1 1999

Disciplines

Physical Sciences and Mathematics
Physics

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title = "Twist modulated phases in chiral smectic liquid crystals",

abstract = " By considering short period helical planar modulations about the layer normal, we construct a model free energy for the ferriclinic phases observed in chiral smectic liquid crystals. We then use this free energy to construct the phase diagram for our model. The resulting phases are compared with the experimentally observed smectic-C* subphases (ferroclinic, antiferroclinic, and heliclinic). A strong coupling is found between the ferroclinic q=2π/a and the heliclinic q=2π/3a modes. This coupling was not considered in previous models. The resulting additional stability of this “locked in” phase is discussed.",

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AU - Petschek, Rolfe G.

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N2 - By considering short period helical planar modulations about the layer normal, we construct a model free energy for the ferriclinic phases observed in chiral smectic liquid crystals. We then use this free energy to construct the phase diagram for our model. The resulting phases are compared with the experimentally observed smectic-C* subphases (ferroclinic, antiferroclinic, and heliclinic). A strong coupling is found between the ferroclinic q=2π/a and the heliclinic q=2π/3a modes. This coupling was not considered in previous models. The resulting additional stability of this “locked in” phase is discussed.

AB - By considering short period helical planar modulations about the layer normal, we construct a model free energy for the ferriclinic phases observed in chiral smectic liquid crystals. We then use this free energy to construct the phase diagram for our model. The resulting phases are compared with the experimentally observed smectic-C* subphases (ferroclinic, antiferroclinic, and heliclinic). A strong coupling is found between the ferroclinic q=2π/a and the heliclinic q=2π/3a modes. This coupling was not considered in previous models. The resulting additional stability of this “locked in” phase is discussed.

UR - https://digitalcommons.fairfield.edu/physics-facultypubs/115

U2 - 10.1103/PhysRevE.60.1799

DO - 10.1103/PhysRevE.60.1799

M3 - Article

VL - 60

JO - Physical Review E

JF - Physical Review E

ER -

Twist modulated phases in chiral smectic liquid crystals

Abstract

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