Kelvin modes of a skyrmion line in chiral magnets and the associated magnon transport
Abstract
Magnetic skyrmions in bulk crystals are linelike topologically protected spin textures. They allow for the propagation of magnons along the skyrmion line but are localized inside the skyrmion line. Analogous to the vortex line, these propagating modes are the Kelvin modes of a skyrmion line. In crystals without an inversion center, it is known that the magnon dispersion in the ferromagnetic state is asymmetric in the wave vector. It is natural to expect that the dispersion of the Kelvin modes is also asymmetric with respect to the wave vector. We study the Kelvin modes of a skyrmion line in the ferromagnetic background. In contrast, we find that the lowest Kelvin mode is symmetric in the wave vector in the low-energy region despite the inversion symmetry breaking. Other Kelvin modes below the magnon continuum are asymmetric, and most of them have a positive group velocity. In conclusion, our results suggest that a skyrmion line can function as a one-way waveguide for magnons.
- Authors:
-
[1];
[2];
[1]
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1650610
- Alternate Identifier(s):
- OSTI ID: 1507177
- Report Number(s):
- LA-UR-19-20239
Journal ID: ISSN 2469-9950; TRN: US2203122
- Grant/Contract Number:
- 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 14; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Magnons; skyrmions
Citation Formats
Lin, Shi-Zeng, Zhu, Jian-Xin, and Saxena, Avadh. Kelvin modes of a skyrmion line in chiral magnets and the associated magnon transport. United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.99.140408.
Lin, Shi-Zeng, Zhu, Jian-Xin, & Saxena, Avadh. Kelvin modes of a skyrmion line in chiral magnets and the associated magnon transport. United States. https://doi.org/10.1103/PhysRevB.99.140408
Lin, Shi-Zeng, Zhu, Jian-Xin, and Saxena, Avadh. Mon .
"Kelvin modes of a skyrmion line in chiral magnets and the associated magnon transport". United States. https://doi.org/10.1103/PhysRevB.99.140408. https://www.osti.gov/servlets/purl/1650610.
@article{osti_1650610,
title = {Kelvin modes of a skyrmion line in chiral magnets and the associated magnon transport},
author = {Lin, Shi-Zeng and Zhu, Jian-Xin and Saxena, Avadh},
abstractNote = {Magnetic skyrmions in bulk crystals are linelike topologically protected spin textures. They allow for the propagation of magnons along the skyrmion line but are localized inside the skyrmion line. Analogous to the vortex line, these propagating modes are the Kelvin modes of a skyrmion line. In crystals without an inversion center, it is known that the magnon dispersion in the ferromagnetic state is asymmetric in the wave vector. It is natural to expect that the dispersion of the Kelvin modes is also asymmetric with respect to the wave vector. We study the Kelvin modes of a skyrmion line in the ferromagnetic background. In contrast, we find that the lowest Kelvin mode is symmetric in the wave vector in the low-energy region despite the inversion symmetry breaking. Other Kelvin modes below the magnon continuum are asymmetric, and most of them have a positive group velocity. In conclusion, our results suggest that a skyrmion line can function as a one-way waveguide for magnons.},
doi = {10.1103/PhysRevB.99.140408},
journal = {Physical Review B},
number = 14,
volume = 99,
place = {United States},
year = {Mon Apr 15 00:00:00 EDT 2019},
month = {Mon Apr 15 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
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