<div class="csl-bib-body">
<div class="csl-entry">Biesner, T., Roh, S., Razpopov, A., Willwater, J., Süllow, S., Li, Y., Zoch, K. M., medarde, marisa, Nuss, J., Gorbunov, D., Skourski, Y., Pustogow, A., Brown, S. E., Krellner, C., Valentí, R., Puphal, P., & Dressel, M. (2022). Multi‐Center Magnon Excitations Open the Entire Brillouin Zone to Terahertz Magnetometry of Quantum Magnets. <i>Advanced Quantum Technologies</i>, <i>5</i>(6), Article 2200023. https://doi.org/10.1002/qute.202200023</div>
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dc.identifier.issn
2511-9044
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/142088
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dc.description.abstract
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.
en
dc.language.iso
en
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dc.publisher
WILEY
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dc.relation.ispartof
Advanced Quantum Technologies
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dc.subject
kagome lattices
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dc.subject
multi-center magnons
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dc.subject
terahertz magnetometry
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dc.subject
terahertz photons
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dc.title
Multi‐Center Magnon Excitations Open the Entire Brillouin Zone to Terahertz Magnetometry of Quantum Magnets
