Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds
Autor: | Nicholas B. Brookes, George A. Sawatzky, Davide Betto, R. Fumagalli, Matteo A. C. Rossi, Emiliano Di Gennaro, José Lorenzana, A. Sambri, Giacomo Claudio Ghiringhelli, Kazuyoshi Yoshimi, Doug Bonn, Leonardo Martinelli, Riccardo Piombo, D. Di Castro, Lucio Braicovich |
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Přispěvatelé: | Betto, D., Fumagalli, R., Martinelli, L., Rossi, M., Piombo, R., Yoshimi, K., Di Castro, D., Di Gennaro, E., Sambri, A., Bonn, D., Sawatzky, G. A., Braicovich, L., Brookes, N. B., Lorenzana, J., Ghiringhelli, G. |
Rok vydání: | 2021 |
Předmět: |
Settore FIS/01
Physics Condensed matter physics Scattering Condensed Matter - Superconductivity Magnon FOS: Physical sciences Order (ring theory) magnetism RIXS cuprate Inelastic neutron scattering Superconductivity (cond-mat.supr-con) MULTIMAGNON OPTICAL-ABSORPTION X-RAY-SCATTERING DYNAMICS STATES Antiferromagnetism Condensed Matter::Strongly Correlated Electrons Continuum (set theory) Energy (signal processing) Spin-½ |
Zdroj: | Physical Review B 103 (2021): L140409-1–L140409-7. doi:10.1103/PhysRevB.103.L140409 info:cnr-pdr/source/autori:Betto D.; Fumagalli R.; Martinelli L.; Rossi M.; Piombo R.; Yoshimi K.; Di Castro D.; Di Gennaro E.; Sambri A.; Bonn D.; Sawatzky G.A.; Braicovich L.; Brookes N.B.; Lorenzana J.; Ghiringhelli G./titolo:Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds/doi:10.1103%2FPhysRevB.103.L140409/rivista:Physical Review B/anno:2021/pagina_da:L140409-1/pagina_a:L140409-7/intervallo_pagine:L140409-1–L140409-7/volume:103 |
ISSN: | 2469-9969 2469-9950 |
Popis: | Thanks to high resolution and polarization analysis, resonant inelastic x-ray scattering (RIXS) magnetic spectra of La2CuO4, Sr2CuO2Cl2 and CaCuO2 reveal a rich set of properties of the spin 1/2 antiferromagnetic square lattice of cuprates. The leading single-magnon peak energy dispersion is in excellent agreement with the corresponding inelastic neutron scattering measurements. However, the RIXS data unveil an asymmetric lineshape possibly due to odd higher order terms. Moreover, a sharp bimagnon feature emerges from the continuum at (1/2,0), coincident in energy with the bimagnon peak detected in optical spectroscopy. These findings show that the inherently complex spin spectra of cuprates, an exquisite manifestation of quantum magnetism, can be effectively explored by exploiting the richness of RIXS cross sections. 7 pages, 3 figures |
Databáze: | OpenAIRE |
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