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Toroidal solitons in magnetic oxides, Bose-Einstein condensates, and other media

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Abstract

We consider toroidal soliton solutions in a number of nonlinear models of field theory (Skyrme, Faddeev, and Higgs models). Such models are used in various areas of solid-state chemistry and physics, chemical physics, astrophysics, and plasma chemistry and physics. The stability of toroidal solitons is shown to have a topological nature. We examine different methods of generating a nonlinear contribution to the Lagrangian in order to insure stability of the torus to collapse. Using the Faddeev and Skyrme models, we analyze the toroidal ordering in Bose-Einstein condensates of 23Na, 39K, and 87Rb alkali-metal atoms, the toroidal structures recently found in the magnetic oxides BiFeO3 and GaFeO3, and potential applications of such structures in spintronics. In addition, we address several critical issues in the chemistry and physics of solitons with high topological charges.

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  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia

    A. N. Kalinkin & V. M. Skorikov

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  1. A. N. Kalinkin
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Original Russian Text © A.N. Kalinkin, V.M. Skorikov, 2007, published in Neorganicheskie Materialy, 2007, Vol. 43, No. 5, pp. 600–610.

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Kalinkin, A.N., Skorikov, V.M. Toroidal solitons in magnetic oxides, Bose-Einstein condensates, and other media. Inorg Mater 43, 526–536 (2007). https://doi.org/10.1134/S0020168507050160

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