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 inte...

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Bibliographic Details
Published in:Communications in theoretical physics 2004, Vol.42 (9), p.453-458
Main Author: LIU Jian-Jun LIU Xiao-Jing SHEN Man YANG Guo-Chen
Format: Article
Language:English
Subjects:
crystals
liquid
nematic
order
parameters
spin
wave
Online Access:Get full text
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Summary: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.
ISSN:0253-6102