液晶乱流中の特異構造によるSub-diffusion

抄録

Diffusion due to developed turbulence of electroconvection in homeotropic nematic systems were studied. Electroconvection in homeotropic system shows peculiar nonlinear phenomena because of interaction between the convection and the nematic director that behaves as a Nambu-Goldstone mode. Motions of tagged-particles were analyzed by the time-dependent diffusion coefficient. The results showed that sub-diffusion appeared in a certain time range. The occurrence of the sub-diffusion suggests that the turbulence has the effect that bounces particles back. Detailed observation for the turbulent structures revealed that the bouncing effect is induced by characteristic line-shaped structures of director caused by the turbulence.