On-off intermittency in stochastically driven electrohydrodynamic convection in nematics

被引:66
作者
John, T
Stannarius, R
Behn, U
机构
[1] Univ Leipzig, Inst Theoret Phys, D-04009 Leipzig, Germany
[2] Univ Leipzig, Inst Expt Phys 1, D-04009 Leipzig, Germany
关键词
D O I
10.1103/PhysRevLett.83.749
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report on-off intermittency in electroconvection of nematic liquid crystals driven by a dichotomous stochastic electric voltage. With increasing voltage amplitude we observe laminar phases of undistorted director state interrupted by shorter bursts of spatially regular stripes. Near a critical value of the amplitude the distribution of the duration of laminar phases is governed over several decades by a power law with exponent -3/2. The experimental findings agree with simulations of the linearized electrohydrodynamic equations near the sample stability threshold.
引用
收藏
页码:749 / 752
页数:4
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