Soft-mode turbulence in electrohydrodynamic convection of a homeotropically aligned nematic layer

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Published
1997-12
Resource Type
journal article
Rights Information
  • Copyright © 1997 American Physical Society
DOI
  • 10.1103/physreve.56.r6256
Publisher
American Physical Society

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The experimental study of electroconvection in a homeotropically aligned nematic ~MBBA! is reported. Thesystem undergoes a supercritical bifurcation ‘‘rest state-spatiotemporal chaos.’’ The chaos is caused by longwavelengthmodulation of the orientation of convective rolls. For the first time the observations both below andbeyond the Lifshitz point are accompanied by quantitative analysis of temporal autocorrelation functions ofturbulent modes. The dependence of the correlation time on the control parameter is obtained. A secondarybifurcation from normal to abnormal rolls is discussed.

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