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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2024 Volume 119, Issue 10, Pages 744–751 (Mi jetpl7230)

This article is cited in 2 papers

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

DOI: 10.31857/S1234567824100069


 English version:
Journal of Experimental and Theoretical Physics Letters, 2024, 119:10, 768–774


© Steklov Math. Inst. of RAS, 2025