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Electric-field-induced local rotation of molecules in nematic-cholesteric droplets

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Abstract

The structural dynamics of nematic-cholesteric liquid crystal (LC) droplets occurring in an isotropic environment in an alternating electric field have been studied. It is established that, above a certain threshold field strength, the conoscopic pattern of a Maltese cross becomes dynamic and begins to rotate. The threshold voltage, as well as the frequency of rotation, is almost independent of the droplet diameter. This phenomenon is related to the development of a self-consistent rotation of LC molecules in the plane perpendicular to the droplet axis. It is shown that this rotation initiates the propagation of a helicoidal wave from one pole of the droplet to another.

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Authors and Affiliations

  1. Institute of Molecular and Crystal Physics, Ufa Research Center, Russian Academy of Sciences, Ufa, Bashkortostan, 450075, Russia

    Yu. I. Timirov, O. A. Skaldin, E. R. Basyrova & I. R. Kayumov

  2. Ufa State Aircraft Technology University, Ufa, Bashkortostan, 450000, Russia

    Yu. I. Timirov, O. A. Skaldin, E. R. Basyrova & I. R. Kayumov

Authors
  1. Yu. I. Timirov
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  2. O. A. Skaldin
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  3. E. R. Basyrova
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  4. I. R. Kayumov
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Corresponding author

Correspondence to Yu. I. Timirov.

Additional information

Original Russian Text © Yu.I. Timirov, O.A. Skaldin, E.R. Basyrova, I.R. Kayumov, 2014, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2014, Vol. 40, No. 13, pp. 81–87.

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Timirov, Y.I., Skaldin, O.A., Basyrova, E.R. et al. Electric-field-induced local rotation of molecules in nematic-cholesteric droplets. Tech. Phys. Lett. 40, 578–580 (2014). https://doi.org/10.1134/S1063785014070116

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  • DOI: https://doi.org/10.1134/S1063785014070116

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