| Autor: |
Pirkl, S., Oswald, P., Pirkl, S., Oswald, P. |
| Zdroj: |
Journal de Physique II; March 1996, Vol. 6 Issue: 3 p355-373, 19p |
| Abstrakt: |
We first show how to make a finger of the second species from a bubble domain in a frustrated cholesteric liquid crystal in an A.C. electric field. Two scenarios are possible, depending on the applied voltage: either the finger forms a single spiral, or it forms two symmetrical spirals which we refer to as twin spirals. We then describe the long-time behavior of an isolated single spiral and, especially, the trajectories of its two tips. These results are discussed using a simple kinematical model in terms of the motion of curves with free ends. We finish by studying the dynamics of the fingers of the second species when the dielectric anisotropy of the liquid crystal tends to zero. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
