中国物理B ›› 2004, Vol. 13 ›› Issue (2): 212-224.doi: 10.1088/1009-1963/13/2/016

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The microscopic theory for BPI and BPII of the blue phase

沈曙曼1, 杨国琛2, 崔英敏2, 刘建军3   

  1. (1)Department of Physics, Hebei Normal University, Shijiazhuang 050016, China; (2)Institute of Physics, Hebei University of Technology, Tianjin 300130, China; (3)Institute of Physics, Hebei University of Technology, Tianjin 300130, China; Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
  • 收稿日期:2003-01-23 修回日期:2003-08-14 出版日期:2004-02-06 发布日期:2005-07-06

The microscopic theory for BPI and BPII of the blue phase

Yang Guo-Chen (杨国琛)a, Cui Ying-Min (崔英敏)a, Liu Jian-Jun (刘建军)ab, Shen Man (沈曙曼)b    

  1. a Institute of Physics, Hebei University of Technology, Tianjin 300130, China; b Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
  • Received:2003-01-23 Revised:2003-08-14 Online:2004-02-06 Published:2005-07-06

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摘要： A statistical theory of the blue phase of chiral liquid crystal is proposed. The form of the interaction potential between molecules is assumed to be the same as that used in the theory for cholesteric phase. Using the cell model of the liquid statistical theory, we deduced the distribution function of single molecule. The free energy of the system obtained has the same form as that of the Ginzberg－Landau phenomenology theory. The order-parameter tensors of BPI and BPII phases we calculated can be compared with the experimental results.

关键词: blue phase, order-parameter tensor, potential parameter

Abstract: A statistical theory of the blue phase of chiral liquid crystal is proposed. The form of the interaction potential between molecules is assumed to be the same as that used in the theory for cholesteric phase. Using the cell model of the liquid statistical theory, we deduced the distribution function of single molecule. The free energy of the system obtained has the same form as that of the Ginzberg－Landau phenomenology theory. The order-parameter tensors of BPI and BPII phases we calculated can be compared with the experimental results.

Key words: blue phase, order-parameter tensor, potential parameter

中图分类号:  (Molecular and microscopic models and theories of liquid crystal structure)

  • 61.30.Cz
61.30.Mp (Blue phases and other defect-phases)