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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2015, Volume 102, Issue 7, Pages 511–516
DOI: https://doi.org/10.7868/S0370274X1519011X (Mi jetpl4752) 		 
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
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DOI: https://doi.org/10.7868/S0370274X1519011X
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
English version:
Journal of Experimental and Theoretical Physics Letters, 2015, Volume 102, Issue 7, Pages 455–460
DOI: https://doi.org/10.1134/S0021364015190029
Bibliographic databases:
Document Type: Article
Language: English
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
Citation in format AMSBIB
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