Defects dynamics in roll structures of twisted nematics

V. Delev, E. Batyrshin, O. Scaldin, Y. Lebedev, Y. Timirov show affiliations and emails
Received: 10 March 2015; Revised: 05 May 2015; Accepted: 10 June 2015
Citation: V. Delev, E. Batyrshin, O. Scaldin, Y. Lebedev, Y. Timirov. Defects dynamics in roll structures of twisted nematics. Lett. Mater., 2015, 5(4) 376-379


Dynamics of singular and nonsingular defects in the periodic structures of rolls arising at electroconvection in nematic liquid crystals twisted by π/2 has been studied. The emergence of non-singular defects is associated with an axial component of the velocity of the hydrodynamic flows whose direction is opposite in the neighboring rolls. At some voltage U>Uc both these struc-tural defects starts to oscillate. It is shown that the average frequency of the "zig-zag" oscillation decreases with increasing size of the defects.

References (13)

1. S.A. Pikin. Structural transitions in liquid crystals.Moskva, Nauka (1981) 336 p. (in Russian).
2. Pattern Formation in Liquid Crystals, ed. by Buka A., Kramer L., New York, Springer-Verlag (1996) 339 p.
3. T. Tóth-Katona, N. Éber, and Á. Buka. Mol. Cryst. Liq.Cryst. 511, 11/1481 (2009).
4. E.S. Batyrshin, A.P. Krekhov, O.A. Skaldin, and V.A.Delev. JETP 114(6), 1052 (2012).
5. S. Rasenat, V. Steinberg, I. Rehberg. Phys. Rev. A 42, 5998(1990).
6. A. Joets, R. Ribotta. J. Phys. (France) 47, 595 (1986).
7. S. Kai, N. Chizumi, M. Kohno. J. Phys. Soc. Jap. 58(10), 3541 (1989).
8. V.A. Delev, P. Toth, and A.P. Krekhov. Mol. Cryst. Liq.Cryst. 351, 179 (2000).
9. O.A. Skaldin, G.R. Yakupova, V.A. Delev, Yu.A. Lebedev, A.A. Nazarov. Phys. of the Solid State 47(2), 374 (2005).
10. O.A. Skaldin, V.A. Delev, E.S. Shikhovtseva, E.S.Batyrshin, Yu.A. Lebedev. JETP Letters 93(7), 388 (2011).
11. O.A. Skaldin, V.A. Delev, E.S. Shikhovtseva. JETP Letters97(2), 92 (2013).
12. A. Hertrich, A.P. Krekhov, O.A. Scaldin. J. Phys. II(France) 4, 239 (1994).
13. M. Scheuring, L. Kramer, J. Peinke. Phys. Rev. E 58, 2018(1998).

Cited by (1)

V. A. Delev, O. A. Scaldin, E. S. Batyrshin, V. N. Nazarov, E. G. Ekomasov. Jetp Lett. 109(2), 87 (2019). Crossref