Dae-Yun Kim, Imane Berrai, T. S. Suraj, Yves Roussigne, Shuhan Yang, Mohamed Belmeguenai, Fanrui Hu, Guoyi Shi, Hui Ru Tan, Jifei Huang, Anjan Soumyanarayanan, Kyoung-Whan Kim, Salim Mourad Cherif, Hyunsoo Yang
{"title":"Chiral damping of magnons","authors":"Dae-Yun Kim, Imane Berrai, T. S. Suraj, Yves Roussigne, Shuhan Yang, Mohamed Belmeguenai, Fanrui Hu, Guoyi Shi, Hui Ru Tan, Jifei Huang, Anjan Soumyanarayanan, Kyoung-Whan Kim, Salim Mourad Cherif, Hyunsoo Yang","doi":"arxiv-2409.04713","DOIUrl":null,"url":null,"abstract":"Chiral magnets have garnered significant interest due to the emergence of\nunique phenomena prohibited in inversion-symmetric magnets. While the\nequilibrium characteristics of chiral magnets have been extensively explored\nthrough the Dzyaloshinskii-Moriya interaction (DMI), non-equilibrium properties\nlike magnetic damping have received comparatively less attention. We present\nthe inaugural direct observation of chiral damping through Brillouin light\nscattering (BLS) spectroscopy. Employing BLS spectrum analysis, we\nindependently deduce the Dzyaloshinskii-Moriya interaction (DMI) and chiral\ndamping, extracting them from the frequency shift and linewidth of the spectrum\npeak, respectively. The resulting linewidths exhibit clear odd symmetry with\nrespect to the magnon wave vector, unambiguously confirming the presence of\nchiral damping. Our study introduces a novel methodology for quantifying chiral\ndamping, with potential ramifications on diverse nonequilibrium phenomena\nwithin chiral magnets.","PeriodicalId":501234,"journal":{"name":"arXiv - PHYS - Materials Science","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Materials Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.04713","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
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), non-equilibrium 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 the Dzyaloshinskii-Moriya interaction (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.