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This article is cited in 1 scientific paper (total in 1 paper)
CONDENSED MATTER
Goldstone mode of skyrmion crystal
V. E. Timofeevab, D. N. Aristovba a St. Petersburg Nuclear Physics Institute, National Research Center Kurchatov Institute, Gatchina, 188300 Russia
b St. Petersburg State University, St. Petersburg, 199034 Russia
Abstract:
We discuss the Goldstone mode of skyrmion crystal in a model of two-dimensional ferromagnet with the Dzyaloshinskii–Moriya interaction in magnetic field. We use stereographic projection approach to construct skyrmion crystal and consider skyrmion displacement field. The small overlap of the individual skyrmion images restricts the potential energy to the interaction of nearest neighboring displacements. The closed form of the Goldstone mode dispersion is found and its dependence on the magnetic field is studied. We use semiclassical quantization to define the Green's function and show that the propagation of displacements through the crystal changes its tensorial form from anisotropic to isotropic one at large times.
Received: 02.08.2023 Revised: 14.08.2023 Accepted: 15.08.2023
Citation:
V. E. Timofeev, D. N. Aristov, “Goldstone mode of skyrmion crystal”, Pis'ma v Zh. Èksper. Teoret. Fiz., 118:6 (2023), 455–461; JETP Letters, 118:6 (2023), 448–454
Linking options:
https://www.mathnet.ru/eng/jetpl7045 https://www.mathnet.ru/eng/jetpl/v118/i6/p455
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Abstract page: | 25 | References: | 5 | First page: | 2 |
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