Tobias Biesner, Seulki Roh, Aleksandar Razpopov, Jannis Willwater, Stefan Süllow, Ying Li, Katharina M. Zoch, Marisa Medarde, Jürgen Nuss, Denis Gorbunov, Yurii Skourski, Andrej Pustogow, Stuart E. Brown, Cornelius Krellner, Roser Valentí, Pascal Puphal, Martin Dressel
- Due to the small photon momentum, optical spectroscopy commonly probes magnetic excitations only at the center of the Brillouin zone; however, there are ways to override this restriction. In case of the distorted kagome quantum magnet Y-kapellasite, Y3Cu9(OH)19Cl8, under scrutiny here, the spin (magnon) density of states (SDOS) can be accessed over the entire Brillouin zone through three-center magnon excitations. This mechanism is aided by the three different magnetic sublattices and strong short-range correlations in the distorted kagome lattice. The results of THz time-domain experiments agree remarkably well with linear spin-wave theory (LSWT). Relaxing the conventional zone-center constraint of photons gives a new aspect to probe magnetism in matter.
Metadaten| Author: | Tobias BiesnerORCiDGND, Seulki RohORCiD, Aleksandar RazpopovORCiD, Jannis WillwaterORCiD, Stefan SüllowORCiDGND, Ying LiGND, Katharina M. Zoch, Marisa MedardeORCiD, Jürgen NussORCiD, Denis Gorbunov, Yurii SkourskiORCiDGND, Andrej PustogowORCiDGND, Stuart E. Brown, Cornelius KrellnerORCiDGND, Roser ValentíORCiDGND, Pascal PuphalORCiDGND, Martin DresselORCiDGND |
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| URN: | urn:nbn:de:hebis:30:3-819665 |
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| DOI: | https://doi.org/10.1002/qute.202200023 |
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| ISSN: | 2511-9044 |
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| Parent Title (English): | Advanced quantum technologies |
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| Publisher: | Wiley-VCH Verlag |
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| Place of publication: | Weinheim |
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| Document Type: | Article |
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| Language: | English |
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| Date of Publication (online): | 2022/03/25 |
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| Date of first Publication: | 2022/03/25 |
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| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
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| Release Date: | 2024/02/06 |
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| Tag: | kagome lattices; multi-center magnons; terahertz magnetometry; terahertz photons |
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| Volume: | 5 |
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| Issue: | 6, 2200023 |
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| Article Number: | 2200023 |
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| Page Number: | 10 |
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| HeBIS-PPN: | 517755335 |
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| Institutes: | Physik |
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| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
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| Sammlungen: | Universitätspublikationen |
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| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
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