Anomalous Temperature Dependence of the Elastic Constant $B$ at the Smectic-to-Nematic Phase Transition in Binary Mixtures of Hexyloxycyanobiphenyl-Octyloxycyanobiphenyl (60CB-80CB)

Publisher Website

5 April 1982

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 48 (14) , 943-946
https://doi.org/10.1103/physrevlett.48.943

Abstract

In hexyloxycyanobiphenyl-octyloxycyanobiphenyl (60CB-80CB) binary mixtures displaying reentrant behavior, the smectic elastic constant,

B

, deviates from a simple power law of the form

B = B_{1} {(T_{NA} - T)}^{ϕ}

and levels off as

T \to T_{NA}

. This behavior is consistent with the Nelson-Toner dislocation-unbinding model of the transition.

Keywords

This publication has 19 references indexed in Scilit:

Critical behavior near the nematic—smectic- $A$ transition in butyloxybenzylidene octylaniline (40.8)
Physical Review A, 1981
Bond-orientational order, dislocation loops, and melting of solids and smectic- $A$ liquid crystals
Physical Review B, 1981
Light-scattering studies on the single-layer smectic $p$ -butoxybenzilidene $p$ -octylaniline
Physical Review A, 1981
Specific Heat near the Nematic-Smectic- $A$ Tricritical Point
Physical Review Letters, 1979
HIGH RESOLUTION X-RAY AND LIGHT SCATTERING STUDIES OF BILAYER SMECTIC A COMPOUNDS
Le Journal de Physique Colloques, 1979
Study of the Superfluid Transition in Two-Dimensional ${}^{4}{He}$ Films
Physical Review Letters, 1978
Critical Surface Density of the Superfluid Component in ${}^{4}{He}$ Films
Physical Review Letters, 1978
Anisotropic critical properties of the de Gennes model for the nematic to smectic- $A$ phase transition
Physical Review B, 1978
Pretransitional mechanical effects in a smectic- $A$ liquid crystal
Physical Review A, 1976
An analogy between superconductors and smectics A
Solid State Communications, 1972