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Transformation from walls to disclination lines : Statics and dynamics of the pincement transition

DOI zum Zitieren dieses Dokuments: https://doi.org/10.1103/PhysRevE.72.051713
URN to cite this document: urn:nbn:de:bvb:703-epub-3988-9

Title data

de Lózar, Alberto ; Schöpf, Wolfgang ; Rehberg, Ingo ; Svensek, Daniel ; Kramer, Lorenz:
Transformation from walls to disclination lines : Statics and dynamics of the pincement transition.
In: Physical Review E. Vol. 72 (November 2005) Issue 5 . - Art. Nr. 051713.
ISSN 1550-2376
DOI: https://doi.org/10.1103/PhysRevE.72.051713

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Abstract

We present an experimental and theoretical study of the pincement phenomenon—transformation of a wall associated with the Fréedericksz transition into a pair of disclination lines. We measure the velocity of the boundary (front) between the two states as a function of the voltage. Experimental results are recovered by numerical simulations based on the nematic tensor order parameter, which also reveal the detailed three-dimensional structure of the front. By introducing reduced models we obtain approximate expressions for the two-state coexistence voltage and the front velocity. We find a bifurcation scenario incorporating a pair of saddle nodes at which the wall and disclination solutions appear or disappear.

Further data

Item Type: Article in a journal
Keywords: Experimental determinations of smectic, nematic, cholesteric, and other structures; Orientational order of liquid crystals, electric and magnetic field effects on order; Defects in liquid crystals; Continuum models and theories of liquid crystal structure
DDC Subjects: 500 Science > 530 Physics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Ingo Rehberg
Profile Fields > Advanced Fields > Nonlinear Dynamics
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Profile Fields
Profile Fields > Advanced Fields
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-3988-9
Date Deposited: 28 Jan 2019 13:59
Last Modified: 28 Jan 2019 13:59
URI: https://epub.uni-bayreuth.de/id/eprint/3988

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