Zerihun Workineh
June 3rd, 2011
PRE: Liq. Cryst.
- Nonsymmetrical thermal conductivity along the director field in ferroelectric nematic liquid crystalsAuthor(s): Lidiane Maria de Souza, Junaid Sofi, and Erms PereiraThe synthesis of ferroelectric nematic liquid crystals (FNLCs) concludes the long wait for their existence and potential usage in multiple liquid crystal based applications. In FNLCs, electric polarization in the nematic phase significantly decreases the switching time of in-on display pixels. I […]
- Hele-Shaw flow of a nematic liquid crystalAuthor(s): Joseph R. L. Cousins, Nigel J. Mottram, and Stephen K. WilsonMotivated by the variety of applications in which nematic Hele-Shaw flow occurs, a theoretical model for Hele-Shaw flow of a nematic liquid crystal is formulated and analyzed. We derive the thin-film Ericksen-Leslie equations that govern nematic Hele-Shaw flow, and consider two important […]
- Surface-directed dynamics in living liquid crystalsAuthor(s): Aditya Vats, Varsha Banerjee, and Sanjay PuriWe study living liquid crystals (LLCs), which are an amalgam of nematic liquid crystals (LCs) and active matter (AM). These LLCs are placed in contact with surfaces which impose planar/homeotropic boundary conditions on the director field of the LC and the polarization field of the AM. The interplay…[Ph […]
- Ordered structures formed by nematic topological defects and their transformation with changing the Euler characteristicsAuthor(s): P. V. Dolganov, N. A. Spiridenko, and V. K. DolganovOrdered chain structures from topological defects of opposite charges (“necklaces” of defects) were prepared and their dynamics and cooperative rearrangement were investigated. We studied topological defects in nematic films with change of the Euler characteristic induced by temperature. Topologi […]
- Constraining the value of the dielectric constant of the ferroelectric nematic phaseAuthor(s): Aitor Erkoreka and Josu Martinez-PerdigueroFerroelectric nematic liquid crystals are currently being subject to a plethora of investigations since they are of great fundamental interest and could potentially foster promising applications. However, many basic aspects are still poorly understood, among which the problem of the dielectric const…[Phys […]
- Steepness-fragility insights from the temperature derivative analysis of dielectric data of a highly nonsymmetric liquid crystal dimerAuthor(s): Josep Salud, Nerea Sebastián, María R. de la Fuente, S. Diez-Berart, and David O. LópezA comprehensive dynamic analysis of the dielectric relaxation-time data across a broad temperature range for both isotropic and nematic phases has been conducted on the CBO3O.Py liquid crystal dimer, the shorter chain-length compound within the highly nonsymmetr […]
- Dynamic flexoelectric instabilities in nematic liquid crystalsAuthor(s): E. S. Pikina, A. R. Muratov, E. I. Kats, and V. V. LebedevElectrohydrodynamic phenomena in liquid crystals constitute an old but still very active research area. The reason is that these phenomena play the key role in various applications of liquid crystals and due to the general interest of the physical community in out-of-equilibrium systems. Ne […]
- Point and line defects in checkerboard patterned hybrid nematic films: A computer simulation investigationAuthor(s): Mariana Casaroto, Cesare Chiccoli, Luiz Roberto Evangelista, Paolo Pasini, Rodolfo Teixeira de Souza, Claudio Zannoni, and Rafael Soares ZolaWe consider a nematic liquid crystal film confined to a flat cell with homeotropic and planar patterned hybrid anchoring and show, using Monte Carlo simulations, the possibility of the system to stabilize lin […]
- Calorimetric evidence for the existence of an intermediate phase between the ferroelectric nematic phase and the nematic phase in the liquid crystal RM734Author(s): J. Thoen, G. Cordoyiannis, E. Korblova, D. M. Walba, N. A. Clark, W. Jiang, G. H. Mehl, and C. GlorieuxThe idea that rodlike molecules possessing an electric dipole moment could exhibit a ferroelectric nematic phase was suggested more than a century ago. However, only recently such a phase has been reported for two quite different liquid crystals: […]
- Orientational ordering and correlation in quasi-one-dimensional hard-body fluids due to close-packing degeneracyAuthor(s): Péter Gurin, Sakineh Mizani, and Szabolcs VargaWe study the orientational ordering properties of some quasi-one-dimensional hard-body fluids, where the anisotropic particles are confined to a straight line, while they are free to rotate in a plane. We examine a class of models where the close-packing structure is degenerate, i.e., the highest po…[ […]