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- SourceAvailable from: Elena Vasilieva[Show abstract] [Hide abstract]
ABSTRACT: The results of a numerical study on the influence of topological defects on mass transfer processes are presented for two-dimensional nonideal systems. Calculations have been performed for Yukawa and inverse-power potentials in a wide range of parameters, corresponding to the experimental conditions in the laboratory dusty plasmas. The relations between a number of topological defects and diffusion coefficients for interacting particles are obtained for the first time.EPL (Europhysics Letters) 06/2014; 106(6):65001. DOI:10.1209/0295-5075/106/65001
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ABSTRACT: We propose Landau phenomenology for describing the phase transition from the conventional nematic into the conical helical orientationally non-uniform structure recently identified in liquid crystals formed by "banana"-shaped molecules. The mean field predictions are mostly in agreement with experimental data. Based on the analogy with de Gennes model, we argue that fluctuations of the order parameter turn the transition to the first order phase transition rather than continuous one predicted by the mean-field theory. This conclusion is in agreement with experimental observations. We discuss the new Goldstone mode to be observed in the low-temperature phase.JETP Letters 06/2014; 100(2). DOI:10.1134/S0021364014140070
Article: Recombination in Dense Ion Plasmas[Show abstract] [Hide abstract]
ABSTRACT: A theory is developed to treat ion recombination in dense ion plasmas. Numerical results are obtained with the method of molecular dynamics. Exponential suppression of recombination is found for the discharge afterglow plasma in sulfur hexafluoride at strong Coulomb nonideality Γ. The reason for suppression is an increase of the recombination activation energy ΔE with increase of Γ. The range ΔE corresponds to the multiparticle fluctuations. Ion solvation is another suppression factor. Its importance is demonstrated for the discharge afterglow plasma in fluorine at weak Coulomb nonideality. The theory developed agrees with the experimental data available. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)Doklady Physics 12/2013; 57(9). DOI:10.1134/S1028335812090108
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