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Pseudo-Casimir effect in untwisted chiral nematic liquid crystals F. Karimi Pour Haddadan,1,2,
 

Summary: Pseudo-Casimir effect in untwisted chiral nematic liquid crystals
F. Karimi Pour Haddadan,1,2,
* D. W. Allender,1
and S. Zumer2,3
1
Department of Physics, Kent State University, Kent, Ohio 44242
2
Department of Physics, University of Ljubljana, Jadranska 19, SI-1000 Ljubljana, Slovenia
3
Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
Received 9 June 2001; published 8 November 2001
We investigate theoretically the pseudo-Casimir force between parallel plates immersed in a chiral nematic
liquid crystal. We focus on small-separation limit where the director configuration between the plates inducing
strong homeotropic anchoring is uniform. We find that the force is attractive at separations smaller than the
crossover distance and repulsive otherwise, and that it diverges logarithmically at the critical distance where
the uniform structure is replaced by a distorted structure. We also analyze modifications to the force introduced
by magnetic field and comment on the possible detection of the effect.
DOI: 10.1103/PhysRevE.64.061701 PACS number s : 61.30.Cz, 64.70.Md
I. INTRODUCTION
In the past decade, the liquid-crystalline analog of the

  

Source: Allender, David W. - Department of Physics, Kent State University

 

Collections: Physics