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  Patterns driven by combined ac and dc electric fields in nematic liquid crystals

Krekhov, A., Decker, W., Pesch, W., Eber, N., Salamon, P., Fekete, B., et al. (2014). Patterns driven by combined ac and dc electric fields in nematic liquid crystals. Physical Review E, 89, 052507-1-052507-7. doi:10.1103/PhysRevE.89.052507.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0F3D-C Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0F3E-A
Genre: Journal Article

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 Creators:
Krekhov, Alexei1, Author              
Decker, Werner, Author
Pesch, Werner, Author
Eber, Nandor, Author
Salamon, Peter, Author
Fekete, Balazs, Author
Buka, Agnes, Author
Affiliations:
1Laboratory for Fluid Dynamics, Pattern Formation and Biocomplexity, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063287              

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 Abstract: The effect of superimposed ac and dc electric fields on the formation of electroconvection and flexoelectric patterns in nematic liquid crystals was studied. For selected ac frequencies, an extended standard model of the electrohydrodynamic instabilities was used to characterize the onset of pattern formation in the two-dimensional parameter space of the magnitudes of the ac and dc electric field components. Numerical as well as approximate analytical calculations demonstrate that depending on the type of patterns and on the ac frequency, the combined action of ac and dc fields may either enhance or suppress the formation of patterns. The theoretical predictions are qualitatively confirmed by experiments in most cases. Some discrepancies, however, seem to indicate the need to extend the theoretical description.

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Language(s): eng - English
 Dates: 2014-05-19
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 702111
DOI: 10.1103/PhysRevE.89.052507
 Degree: -

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Title: Physical Review E
  Alternative Title : Phys. Rev. E
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 89 Sequence Number: - Start / End Page: 052507-1 - 052507-7 Identifier: -