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Chin. Phys. B, 2014, Vol. 23(4): 046102    DOI: 10.1088/1674-1056/23/4/046102

The stress field and energy of screw dislocation in smectic A liquid crystals and the mistakes of the classical solution

Fan Tian-Youa, Li Xian-Fangb
a School of Physics, Beijing Institute of Technology, Beijing 100081, China;
b Department of Engineering Mechanics, Central South University, Changsha 410075, China
Abstract  The mistakes in the classical solution of a screw dislocation in smectic A liquid crystals are pointed out. A serious problem with the well-known theory is pointed, which may be named de Gennes-Kleman-Pershan paradox and has existed for many decades in the scientific community of liquid crystal study. The correct solution is given in this paper by a simplest, elementary, and straight forward method. In connection with this, the stress field and energy of dislocation are discussed in detail. The present article provides the correct stress field and dislocation energy as well.
Keywords:  liquid crystals      dislocation      exact solution  
Received:  22 July 2012      Revised:  11 November 2013      Accepted manuscript online: 
PACS:  61.30.-v (Liquid crystals)  
  61.30.Dk (Continuum models and theories of liquid crystal structure)  
  61.30.Jf (Defects in liquid crystals)  
Corresponding Authors:  Fan Tian-You     E-mail:
About author:  61.30.-v; 61.30.Dk; 61.30.Jf

Cite this article: 

Fan Tian-You, Li Xian-Fang The stress field and energy of screw dislocation in smectic A liquid crystals and the mistakes of the classical solution 2014 Chin. Phys. B 23 046102

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