Instability of radial hedgehog configurations in nematic liquid crystals under Landau–de Gennes free-energy models

1999 ◽  
Vol 59 (1) ◽  
pp. 563-567 ◽  
Author(s):  
E. C. Gartland ◽  
S. Mkaddem
Keyword(s):  
Free Energy ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Energy Models

Spontaneously Twisted Nonchiral Nematic Liquid Crystals

1990 ◽  
Vol 45 (6) ◽  
pp. 783-789 ◽  
Author(s):  
A. Chrzanowska
Keyword(s):  
Free Energy ◽  
Liquid Crystals ◽  
Elastic Constant ◽  
Nematic Liquid Crystals ◽  
Model Potential ◽  
Higher Order ◽  
Microscopic Model ◽  
Stability Conditions ◽  
Higher Order Terms ◽  
Potential Stability

AbstractNematic liquid crystals exhibiting a negative K2 elastic constant are discussed on the basis of a microscopic model potential. Stability conditions are satisfied by taking into account higher order terms in the expansion of the free energy. A continuous Freederiks effect is predicted for systems with negative K2.

The free energy as a function of the order parameter in nematic liquid crystals

1976 ◽  
Vol 57 (1) ◽  
pp. 53-56 ◽  
Author(s):  
Y. Poggi ◽  
J.C. Filippini ◽  
R. Aleonard
Keyword(s):  
Free Energy ◽  
Liquid Crystals ◽  
Order Parameter ◽  
Nematic Liquid Crystals
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