Dynamics of electroconvective nematic liquid crystal structures in a nonharmonic electric field |
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Authors: | N N Kartavykh and B L Smorodin |
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Institution: | 1.Perm State University,Perm,Russia |
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Abstract: | The emergence of electroconvection in a nematic liquid crystal under the action of a nonharmonic electric field is investigated.
Analysis is carried out using a 2D model. We propose new forms of the varying electric field acting on the system, for which
subharmonic oscillations exist: (a) electric field of a trapezoidal form and (b) external field varying in accordance with
the law of “joined cosines.” The behavior of synchronous excitations in the insulating and conducting regimes, as well as
subharmonic oscillations, is analyzed. The parametric instability domains are found, and the critical frequencies of transition
between different response regimes are determined. The stability maps of the nematic liquid crystal are constructed on the
frequency-voltage amplitude plane. |
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Keywords: | |
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