DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Kyusup | ko |
dc.contributor.author | Lee, Dong-Kyu | ko |
dc.contributor.author | Yang, Dongsheng | ko |
dc.contributor.author | Mishra, Rahul | ko |
dc.contributor.author | Kim, Dong-Jun | ko |
dc.contributor.author | Liu, Sheng | ko |
dc.contributor.author | Xiong, Qihua | ko |
dc.contributor.author | Kim, Se Kwon | ko |
dc.contributor.author | Lee, Kyung-Jin | ko |
dc.contributor.author | Yang, Hyunsoo | ko |
dc.date.accessioned | 2021-12-24T06:42:54Z | - |
dc.date.available | 2021-12-24T06:42:54Z | - |
dc.date.created | 2021-10-27 | - |
dc.date.created | 2021-10-27 | - |
dc.date.issued | 2021-12 | - |
dc.identifier.citation | NATURE NANOTECHNOLOGY, v.16, no.12, pp.1337 - 1341 | - |
dc.identifier.issn | 1748-3387 | - |
dc.identifier.uri | http://hdl.handle.net/10203/291111 | - |
dc.description.abstract | Magnon-mediated angular-momentum flow in antiferromagnets may become a design element for energy-efficient, low-dissipation and high-speed spintronic devices1,2. Owing to their low energy dissipation, antiferromagnetic magnons can propagate over micrometre distances3. However, direct observation of their high-speed propagation has been elusive due to the lack of sufficiently fast probes2. Here we measure the antiferromagnetic magnon propagation in the time domain at the nanoscale (≤50 nm) with optical-driven terahertz emission. In non-magnetic-Bi2Te3/antiferromagnetic-insulator-NiO/ferromagnetic-Co trilayers, we observe a magnon velocity of ~650 km s–1 in the NiO layer. This velocity far exceeds previous estimations of the maximum magnon group velocity of ~40 km s–1, which were based on the magnon dispersion measurements of NiO using inelastic neutron scattering4,5. Our theory suggests that for magnon propagation at the nanoscale, a finite damping makes the dispersion anomalous for small magnon wavenumbers and yields a superluminal-like magnon velocity. Given the generality of finite dissipation in materials, our results strengthen the prospects of ultrafast nanodevices using antiferromagnetic magnons. | - |
dc.language | English | - |
dc.publisher | NATURE PORTFOLIO | - |
dc.title | Superluminal-like magnon propagation in antiferromagnetic NiO at nanoscale distances | - |
dc.type | Article | - |
dc.identifier.wosid | 000710873000002 | - |
dc.identifier.scopusid | 2-s2.0-85117884659 | - |
dc.type.rims | ART | - |
dc.citation.volume | 16 | - |
dc.citation.issue | 12 | - |
dc.citation.beginningpage | 1337 | - |
dc.citation.endingpage | 1341 | - |
dc.citation.publicationname | NATURE NANOTECHNOLOGY | - |
dc.identifier.doi | 10.1038/s41565-021-00983-4 | - |
dc.contributor.localauthor | Kim, Se Kwon | - |
dc.contributor.localauthor | Lee, Kyung-Jin | - |
dc.contributor.nonIdAuthor | Lee, Kyusup | - |
dc.contributor.nonIdAuthor | Lee, Dong-Kyu | - |
dc.contributor.nonIdAuthor | Yang, Dongsheng | - |
dc.contributor.nonIdAuthor | Mishra, Rahul | - |
dc.contributor.nonIdAuthor | Kim, Dong-Jun | - |
dc.contributor.nonIdAuthor | Liu, Sheng | - |
dc.contributor.nonIdAuthor | Xiong, Qihua | - |
dc.contributor.nonIdAuthor | Yang, Hyunsoo | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | SPIN | - |
dc.subject.keywordPlus | DISPERSION | - |
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