In smectic nanofilms, the coalescence of islands (areas thicker than the smectic nanofilm) of different thicknesses and radial dimensions is studied. The initial stage of coalescence (fusion of islands) has a dislocation nature and is associated with changes in the energy of dislocation loops. The second stage of coalescence with the collapse of one of the islands occurs with the increase in the size of the other island. The estimates obtained show that the change in the energy of dislocation loops and the interaction of the surfaces of the smectic nanofilm play the decisive role at this stage. An unexpected effect of displacement of the center of mass of two islands in the process of their coalescence is also discovered. The effect is related to the collective dynamics of the material flows of the islands and the smectic nanofilm.
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This work was supported by the Russian Science Foundation, project no. 18-12-00108.
Russian Text © The Author(s), 2019, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2019, Vol. 110, No. 8, pp. 539–544.
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Dolganov, P.V., Shuravin, N.S., Kats, E.I. et al. Coalescence of Islands of Different Thicknesses in Smectic Nanofilms. Jetp Lett. 110, 545–550 (2019). https://doi.org/10.1134/S0021364019200037