In this work, we observe experimentally the dynamics of the defects of a periodic convective pattern obtained in a liquid crystal n-(4-methoxybenziliden)-4-butylamilin 98% cell subjected to electro-nematic instability by means of an ac electric field. We perform a check of the validity of the theoretical prescriptions regarding the interaction of these defects with the external phase-field gradient. We found results in a good agreement with the theory.

Experimental defect dynamics driven by phase gradient in liquid-crystal electro-convective patterns / D'Amico, Pino; Fronzoni, Leone; Maione, Ivan A.; Palatella, Luigi. - In: PHYSICA D-NONLINEAR PHENOMENA. - ISSN 0167-2789. - 197:(2004), pp. 364-374. [10.1016/j.physd.2004.07.010]

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