Studies on Nematic Liquid Crystal Using Spin Wave Theory

A spin wave theory is proposed to study nematic liquid crystals. Since the orientation of the molecularlong axis and the angular momentum of the molecule rotating around its long axis have the same direction, operatorscan be introduced to research the nematic liquid crystal. By transforming the intermolecular interaction potential,the Hamiltonian of the system has the same form as that of the ferromagnetic substance. The relation of the orderparameters to the reduced temperature can be obtained. It is in good agreement with the experimental results in thelow temperature region. In the high temperature region close to the transition point, by using the Hamiltonian, thetransition point can be obtained, which is near to the Maier-Saupe's result.

作 者： LIU Jian-Jun LIU Xiao-Jing SHEN Man Yang Guo-Chen   作者單位： LIU Jian-Jun(College of Physics, Hebei Normal University, Shijiazhuang 050016, China;Institute of Physics, Hebei University of Technology, Tianjin 300130, China)

LIU Xiao-Jing,SHEN Man(College of Physics, Hebei Normal University, Shijiazhuang 050016, China)

Yang Guo-Chen(Institute of Physics, Hebei University of Technology, Tianjin 300130, China) 

刊 名： 理論物理通訊(英文版)  ISTIC SCI 英文刊名： COMMUNICATIONS IN THEORETICAL PHYSICS  年，卷(期)： 2004 42(9)  分類號：   關(guān)鍵詞： nematic liquid crystals   spin wave   order parameters  

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