Electroconvection in homeotropic nematic liquid crystals

Nándor Éber, A. Buka

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Electroconvection is a classical example of pattern-forming phenomena in liquid crystals, typically observed in nematics with negative dielectric and positive conductivity anisotropies. This article focuses on how electroconvection in the homeotropic geometry differs from that in planar alignment. The influence of an additional magnetic field on the pattern characteristics and on secondary instabilities (the normal roll-abnormal roll transition) is discussed. The homeotropic alignment offers unique possibilities also for studying defect motion. Basic characteristics of some patterns of large wavelength are presented and compared with those of the classical Carr-Helfrich structures. Finally, electroconvection in substances with negative conductivity anisotropy is addressed.

Original languageEnglish
Pages (from-to)433-442
Number of pages10
JournalPhase Transitions
Volume78
Issue number6
DOIs
Publication statusPublished - Jun 2005

Fingerprint

Nematic liquid crystals
Anisotropy
liquid crystals
Liquid Crystals
alignment
Liquid crystals
conductivity
anisotropy
Magnetic fields
Wavelength
Defects
Geometry
defects
geometry
magnetic fields
wavelengths

Keywords

  • Electroconvection
  • Homeotropic orientation
  • Nematic liquid crystal
  • Pattern formation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Electroconvection in homeotropic nematic liquid crystals. / Éber, Nándor; Buka, A.

In: Phase Transitions, Vol. 78, No. 6, 06.2005, p. 433-442.

Research output: Contribution to journalArticle

Éber, Nándor ; Buka, A. / Electroconvection in homeotropic nematic liquid crystals. In: Phase Transitions. 2005 ; Vol. 78, No. 6. pp. 433-442.
@article{3d85bfe689384a04a7e5fe75aebfeb0e,
title = "Electroconvection in homeotropic nematic liquid crystals",
abstract = "Electroconvection is a classical example of pattern-forming phenomena in liquid crystals, typically observed in nematics with negative dielectric and positive conductivity anisotropies. This article focuses on how electroconvection in the homeotropic geometry differs from that in planar alignment. The influence of an additional magnetic field on the pattern characteristics and on secondary instabilities (the normal roll-abnormal roll transition) is discussed. The homeotropic alignment offers unique possibilities also for studying defect motion. Basic characteristics of some patterns of large wavelength are presented and compared with those of the classical Carr-Helfrich structures. Finally, electroconvection in substances with negative conductivity anisotropy is addressed.",
keywords = "Electroconvection, Homeotropic orientation, Nematic liquid crystal, Pattern formation",
author = "N{\'a}ndor {\'E}ber and A. Buka",
year = "2005",
month = "6",
doi = "10.1080/01411590500185278",
language = "English",
volume = "78",
pages = "433--442",
journal = "Phase Transitions",
issn = "0141-1594",
publisher = "Taylor and Francis Ltd.",
number = "6",

}

TY - JOUR

T1 - Electroconvection in homeotropic nematic liquid crystals

AU - Éber, Nándor

AU - Buka, A.

PY - 2005/6

Y1 - 2005/6

N2 - Electroconvection is a classical example of pattern-forming phenomena in liquid crystals, typically observed in nematics with negative dielectric and positive conductivity anisotropies. This article focuses on how electroconvection in the homeotropic geometry differs from that in planar alignment. The influence of an additional magnetic field on the pattern characteristics and on secondary instabilities (the normal roll-abnormal roll transition) is discussed. The homeotropic alignment offers unique possibilities also for studying defect motion. Basic characteristics of some patterns of large wavelength are presented and compared with those of the classical Carr-Helfrich structures. Finally, electroconvection in substances with negative conductivity anisotropy is addressed.

AB - Electroconvection is a classical example of pattern-forming phenomena in liquid crystals, typically observed in nematics with negative dielectric and positive conductivity anisotropies. This article focuses on how electroconvection in the homeotropic geometry differs from that in planar alignment. The influence of an additional magnetic field on the pattern characteristics and on secondary instabilities (the normal roll-abnormal roll transition) is discussed. The homeotropic alignment offers unique possibilities also for studying defect motion. Basic characteristics of some patterns of large wavelength are presented and compared with those of the classical Carr-Helfrich structures. Finally, electroconvection in substances with negative conductivity anisotropy is addressed.

KW - Electroconvection

KW - Homeotropic orientation

KW - Nematic liquid crystal

KW - Pattern formation

UR - http://www.scopus.com/inward/record.url?scp=23844518727&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23844518727&partnerID=8YFLogxK

U2 - 10.1080/01411590500185278

DO - 10.1080/01411590500185278

M3 - Article

VL - 78

SP - 433

EP - 442

JO - Phase Transitions

JF - Phase Transitions

SN - 0141-1594

IS - 6

ER -