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CONDENSED MATTER
Dynamics of “breathing” skyrmions
I. S. Lobanov, V. M. Uzdin Faculty of Physics, ITMO University, St. Petersburg, 197101 Russia
Abstract:
A generalized Thiele equation, which includes a given set of low-energy excitations of an equilibrium magnetic structure, has been derived to describe the dynamics of chiral topological systems. A “breathing” mode of magnetic skyrmions corresponding to a change in their size is included. The relaxation of the magnetic structure under the variation of a magnetic field has been studied. The importance of keeping the Hamiltonian form of the equations of motion has been demonstrated. The radius and helicity of a skyrmion are canonically conjugate variables, and only their simultaneous inclusion allows the reproduction of the main features of the magnetic relaxation after the magnetic field is switched-on/off, which is accompanied by oscillations of the radius.
Received: 21.03.2024 Revised: 09.04.2024 Accepted: 10.04.2024
Citation:
I. S. Lobanov, V. M. Uzdin, “Dynamics of “breathing” skyrmions”, Pis'ma v Zh. Èksper. Teoret. Fiz., 119:10 (2024), 744–751; JETP Letters, 119:10 (2024), 768–774
Linking options:
https://www.mathnet.ru/eng/jetpl7230 https://www.mathnet.ru/eng/jetpl/v119/i10/p744
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Abstract page: | 17 | References: | 4 | First page: | 1 |
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