Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Display Documents



  history
ID: 702111.0, MPI für Dynamik und Selbstorganisation / Hydrodynamik und Strukturbildung
Patterns driven by combined ac and dc electric fields in nematic liquid crystals
Authors:Krekhov, Alexei; Decker, Werner; Pesch, Werner; Eber, Nandor; Salamon, Peter; Fekete, Balazs; Buka, Agnes
Language:English
Date of Publication (YYYY-MM-DD):2014-05-19
Title of Journal:Physical Review E
Journal Abbrev.:Phys. Rev. E
Volume:89
Start Page:052507-1
End Page:052507-7
Review Status:Peer-review
Audience:Experts Only
Intended Educational Use:Yes
Abstract / Description:The effect of superimposed ac and dc electric fields on the formation of electroconvection and flexoelectric patterns in nematic liquid crystals was studied. For selected ac frequencies, an extended standard model of the electrohydrodynamic instabilities was used to characterize the onset of pattern formation in the two-dimensional parameter space of the magnitudes of the ac and dc electric field components. Numerical as well as approximate analytical calculations demonstrate that depending on the type of patterns and on the ac frequency, the combined action of ac and dc fields may either enhance or suppress the formation of patterns. The theoretical predictions are qualitatively confirmed by experiments in most cases. Some discrepancies, however, seem to indicate the need to extend the theoretical description.
External Publication Status:published
Document Type:Article
Communicated by:Folkert Müller-Hoissen
Affiliations:MPI für Dynamik und Selbstorganisation/Hydrodynamik und Strukturbildung
External Affiliations:Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany;
Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, P. O. Box 49, H-1525 Budapest, Hungary
Identifiers:DOI:10.1103/PhysRevE.89.052507
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.