|
This article is cited in 5 scientific papers (total in 5 papers)
CONDENSED MATTER
Magnon spectrum in ferromagnets with a skyrmion
D. N. Aristovab, S. S. Kravchenkoba, A. O. Sorokinba a Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”, 188300 Gatchina, Russia
b Department of Physics, St. Petersburg State University, 199034 St. Petersburg, Russia
Abstract:
The analysis of the spin wave excitations in two-dimensional isotropic Heisenberg ferromagnet is performed with a single skyrmion in the ground state. We employ the ideas of semiclassical quantization method, duly modified for the use of the lattice model and Maleyev–Dyson boson representation of spin operators. The resulting Schrödinger equation for magnons describes the dispersion and wave functions of spin-wave excitations with strictly non-negative spectrum. In contrast to usual ferromagnet, we demonstrate the existence of three zero modes, corresponding to conformal symmetries spontaneously violated by the skyrmion configuration.
Received: 06.08.2015 Revised: 18.08.2015
Citation:
D. N. Aristov, S. S. Kravchenko, A. O. Sorokin, “Magnon spectrum in ferromagnets with a skyrmion”, Pis'ma v Zh. Èksper. Teoret. Fiz., 102:7 (2015), 511–516; JETP Letters, 102:7 (2015), 455–460
Linking options:
https://www.mathnet.ru/eng/jetpl4752 https://www.mathnet.ru/eng/jetpl/v102/i7/p511
|
Statistics & downloads: |
Abstract page: | 166 | Full-text PDF : | 39 | References: | 48 | First page: | 21 |
|