scholarly journals Switching in a Biaxial Smectic A - like Phase

2021 ◽  
Vol 30 (2) ◽  
pp. 20-25
Author(s):  
Yuri P. Panarin ◽  
Carsten Tschierske ◽  
Jagdish K. Vij
Keyword(s):  
Smectic A

Freeze-fracture TEM of the helical smectic A* phase

1992 ◽  
Vol 50 (1) ◽  
pp. 278-279
Author(s):  
K.J. Ihn ◽  
R. Pindak ◽  
J. A. N. Zasadzinski
Keyword(s):  
Liquid Crystal ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Freeze Fracture ◽  
Smectic Phase ◽  
Layer Spacing ◽  
Screw Dislocations ◽  
Smectic A ◽  
Smectic Phases ◽  
Discrete Amount

A new liquid crystal (called the smectic-A* phase) that combines cholesteric twist and smectic layering was a surprise as smectic phases preclude twist distortions. However, the twist grain boundary (TGB) model of Renn and Lubensky predicted a defect-mediated smectic phase that incorporates cholesteric twist by a lattice of screw dislocations. The TGB model for the liquid crystal analog of the Abrikosov phase of superconductors consists of regularly spaced grain boundaries of screw dislocations, parallel to each other within the grain boundary, but rotated by a fixed angle with respect to adjacent grain boundaries. The dislocations divide the layers into blocks which rotate by a discrete amount, Δθ, given by the ratio of the layer spacing, d, to the distance between grain boundaries, lb; Δθ ≈ d/lb (Fig. 1).

High resolution X-ray studies of the smectic A-nematic transition

1978 ◽  
Vol 3 ◽  
pp. 357-357
Author(s):  
J. Als-Nielsen ◽  
R. J. Birgeneau ◽  
M. Kaplan ◽  
J. D. Litster ◽  
C. R. Safinya
Keyword(s):  
High Resolution ◽  
X Ray ◽  
Smectic A

Nematic-smectic A-reentrant nematic transitions in 80CB : 60CB mixtures

1984 ◽  
Vol 45 (3) ◽  
pp. 529-538 ◽  
Author(s):  
A.R. Kortan ◽  
H. von Känel ◽  
R.J. Birgeneau ◽  
J.D. Litster
Keyword(s):  
Smectic A

Smectic A-Smectic B interface : faceting and surface free energy measurement

1989 ◽  
Vol 50 (24) ◽  
pp. 3527-3534 ◽  
Author(s):  
P. Oswald ◽  
F. Melo ◽  
C. Germain
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Energy Measurement ◽  
Smectic A
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