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- Publications
- Influence
Inversion walls in homeotropic nematic and cholesteric layers
- J. Gilli, S. Thiberge, A. Vierheilig, F. Fried
- Physics
- 1 November 1997
We describe the experimental properties of metastable domains associated with the presence of an Inversion Wall (IW) and observed with homeotropically anchored nematic and cholesteric liquid crystals… Expand
Excitability and Defect-Mediated Turbulence in Nematic Liquid Crustal
We report the observation of one-arm spiral waves and of turbulence states in a nematic slab subjected to an external forcing. These one-arm spiral waves constitute a close analog to the spiral waves… Expand
On the critical equilibrium of the spiral spring pendulum
- P. Coullet, J. Gilli, G. Rousseaux
- Physics
- Proceedings of the Royal Society A: Mathematical…
- 8 February 2010
Physical systems such as an inverted pendulum driven by a spiral spring, an unbalanced Euler elastica with a travelling mass, a heavy body with a parabolic section and an Ising ferromagnet are very… Expand
Ising-Bloch transition in a nematic liquid crystal
- J. Gilli, M. Morabito, T. Frisch
- Chemistry
- 1 February 1994
We consider a nematic slab with homeotropic anchoring and investigate the effect of a magnetic field, H, parallel to the plates and an electric field, E, perpendicular to them (e a 0). The magnetic… Expand
Excitability in liquid crystal.
- P. Coullet, T. Frisch, J. Gilli, S. Rica
- Physics, Medicine
- Chaos
- 1 September 1994
The spiral waves observed in a liquid crystal submitted to a vertical electric field and a horizontal rotating magnetic field are explained in the framework of a purely mechanical description of the… Expand
Interface dynamics in liquid crystals
- C. Chevallard, M. Clerc, P. Coullet, J. Gilli
- Physics
- 1 February 2000
Abstract:We have experimentally observed the pattern instabilities of an Ising wall formed in a nematic or cholesteric liquid crystal layer. We have deduced an envelope equation, relevant close to… Expand
Rheological studies of cellulose derivatives solutions
The rheological behavior of solutions of cellulose derivatives, acetate, and hydroxypropyl was studied as a function of different parameters; molecular weight, concentration,…, at T = 25°C in the… Expand
Flow Alignment in Smectic Liquid Crystal
- C. Chevallard, T. Frisch, J. Gilli
- Physics
- 1 September 1997
The experimental results of Cladis et al. ill about the behaviour of smectic-C liquid crystal free-standing films subjected to a two-dimensional shear flow are reproduced via a Ginzburg-Landau model… Expand
“Magic Spiral” Submitted to a Torque: Topological Flows Driven by Ericksen Stresses in Sm C Films
- C. Chevallard, J. Gilli, T. Frisch, I. Chikina, P. Pieranski
- Physics
- 1 August 1999
Abstract We will show here that, in a two-dimensional liquid crystal system where disclinations are present, the elastic torque cannot balance alone an external torque; a hydrodynamic flow must… Expand
New Aspect of the Voltage/Confinement Ratio Phase Diagram for a Confined Homeotropic Cholesteric
- J. Gilli, S. Thiberge, D. Mănăilă-Maximean
- Chemistry
- 1 January 2004
We have investigated the behavior of a cholesteric mixture, consisting of the negative dielectric anisotropy liquid crystal MBBA and a chiral dopant S811(1%b.w.). In the phase diagram a.c. applied… Expand
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