PMID: 15244714Jul 13, 2004Paper

Dislocation dynamics in an anisotropic stripe pattern

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
Carina KamagaMichael Dennin

Abstract

The dynamics of dislocations confined to grain boundaries in a striped system are studied using electroconvection in the nematic liquid crystal N4. In electroconvection, a striped pattern of convection rolls forms for sufficiently high driving voltages. We consider the case of a rapid change in the voltage that takes the system from a uniform state to a state consisting of striped domains with two different wave vectors. The domains are separated by domain walls along one axis and a grain boundary of dislocations in the perpendicular direction. The pattern evolves through dislocation motion parallel to the domain walls. We report on features of the dislocation dynamics. The kinetics of the domain motion is quantified using three measures: dislocation density, average domain wall length, and total domain wall length per area. All three quantities exhibit behavior consistent with power-law evolution in time, with the defect density decaying as t(-1/3), the average domain wall length growing as t(1/3), and the total domain wall length decaying as t(-1/5). The two different exponents are indicative of the anisotropic growth of domains in the system.

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Citations

Mar 10, 2016·ACS Applied Materials & Interfaces·Gabriele SeguiniMichele Perego
May 23, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·C Reichhardt, C J Olson Reichhardt
Oct 10, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Mary Griffith, Michael Dennin
Nov 13, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J R Gomez-Solano, D Boyer
Apr 12, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Hai Qian, Gene F Mazenko
Apr 12, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Daniel R SpiegelSkyler R Saucedo
Jun 29, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Denis Funfschilling, Michael Dennin
Aug 7, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Zhi-Feng Huang, Jorge Viñals

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