Chiral Damping of Magnons
Chiral magnets have garnered significant interest due to the emergence of unique phenomena prohibited in inversion-symmetric magnets. While the equilibrium characteristics of chiral magnets have been extensively explored through the Dzyaloshinskii-Moriya interaction (DMI), nonequilibrium properties like magnetic damping have received comparatively less attention. We present the inaugural direct observation of chiral damping through Brillouin light scattering (BLS) spectroscopy. Employing BLS spectrum analysis, we independently deduce both the DMI and chiral damping, extracting them from the frequency shift and linewidth of the spectrum peak, respectively. The resulting linewidths exhibit clear odd symmetry with respect to the magnon wave vector, unambiguously confirming the presence of chiral damping. Our study introduces a novel methodology for quantifying chiral damping, with potential ramifications on diverse nonequilibrium phenomena within chiral magnets.
Authors
- Dae‐Yun Kim (ORCID: https://orcid.org/0000-0002-5940-8436)
- Guoyi Shi (ORCID: https://orcid.org/0009-0003-9060-6005)
- Y. Roussigné (ORCID: https://orcid.org/0000-0001-7698-8092)
- T. S. Suraj (ORCID: https://orcid.org/0000-0002-6543-5617)
- S. M. Chérif
- M. Belmeguenai (ORCID: https://orcid.org/0000-0002-2395-1146)
- Shuhan Yang (ORCID: https://orcid.org/0000-0002-2237-3495)
- Anjan Soumyanarayanan (ORCID: https://orcid.org/0000-0003-2680-6005)
- Kyoung‐Whan Kim (ORCID: https://orcid.org/0000-0002-1382-7088)
- Hyunsoo Yang (ORCID: https://orcid.org/0000-0003-0907-2898)
- Imane Berrai (ORCID: https://orcid.org/0009-0002-2427-0630)
- Fanrui Hu (ORCID: https://orcid.org/0009-0002-5745-9579)
- Hui Ru Tan (ORCID: https://orcid.org/0000-0003-4839-4515)
- Jifei Huang
Institutions
- Agency for Science, Technology and Research (SG)
- National University of Singapore (SG)
- Yonsei University (KR)
- Samsung (South Korea) (KR)
- Sorbonne Université (FR)
- Université Sorbonne Paris Nord (FR)
- Korea Institute of Science and Technology (KR)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2024-10-11
- DOI
- https://doi.org/10.1103/physrevlett.133.156704
- Citations
- 5
- Primary Topic
- Magnetism in coordination complexes
- Type
- article
- Field-Weighted Citation Impact
- 0.59
Funders
- Agency for Science, Technology and Research
- Ministry of Education - Singapore
- Korea Institute of Science and Technology Information
- National Research Foundation of Korea