Anisotropic magnon damping by zero-temperature quantum fluctuations in ferromagnetic CrGeTe3

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dc.citation.articleNumber4037
dc.citation.journalTitleNature Communications
dc.citation.volumeNumber13
dc.contributor.authorChen, Lebing
dc.contributor.authorMao, Chengjie
dc.contributor.authorChung, Jae-Ho
dc.contributor.authorStone, Matthew B.
dc.contributor.authorKolesnikov, Alexander I.
dc.contributor.authorWang, Xiaoping
dc.contributor.authorMurai, Naoki
dc.contributor.authorGao, Bin
dc.contributor.authorDelaire, Olivier
dc.contributor.authorDai, Pengcheng
dc.date.accessioned2022-08-04T14:53:28Z
dc.date.available2022-08-04T14:53:28Z
dc.date.issued2022
dc.description.abstractSpin and lattice are two fundamental degrees of freedom in a solid, and their fluctuations about the equilibrium values in a magnetic ordered crystalline lattice form quasiparticles termed magnons (spin waves) and phonons (lattice waves), respectively. In most materials with strong spin-lattice coupling (SLC), the interaction of spin and lattice induces energy gaps in the spin wave dispersion at the nominal intersections of magnon and phonon modes. Here we use neutron scattering to show that in the two-dimensional (2D) van der Waals honeycomb lattice ferromagnetic CrGeTe3, spin waves propagating within the 2D plane exhibit an anomalous dispersion, damping, and breakdown of quasiparticle conservation, while magnons along the c axis behave as expected for a local moment ferromagnet. These results indicate the presence of dynamical SLC arising from the zero-temperature quantum fluctuations in CrGeTe3, suggesting that the observed in-plane spin waves are mixed spin and lattice quasiparticles fundamentally different from pure magnons and phonons.
dc.identifier.citationChen, Lebing, Mao, Chengjie, Chung, Jae-Ho, et al.. "Anisotropic magnon damping by zero-temperature quantum fluctuations in ferromagnetic CrGeTe3." <i>Nature Communications,</i> 13, (2022) Springer Nature: https://doi.org/10.1038/s41467-022-31612-w.
dc.identifier.digitals41467-022-31612-w
dc.identifier.doihttps://doi.org/10.1038/s41467-022-31612-w
dc.identifier.urihttps://hdl.handle.net/1911/112984
dc.language.isoeng
dc.publisherSpringer Nature
dc.rightsThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleAnisotropic magnon damping by zero-temperature quantum fluctuations in ferromagnetic CrGeTe3
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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