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 line shape 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.

Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds / Betto, Davide; Fumagalli, Roberto; Martinelli, Leonardo; Rossi, Matteo; Piombo, Riccardo; Yoshimi, Kazuyoshi; Di Castro, Daniele; Di Gennaro, Emiliano; Sambri, Alessia; Bonn, Doug; Sawatzky, George A.; Braicovich, Lucio; Brookes, Nicholas B.; Lorenzana, José; Ghiringhelli, Giacomo. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 103:14(2021). [10.1103/PhysRevB.103.L140409]

Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds

Rossi, Matteo;Piombo, Riccardo;Di Castro, Daniele;Lorenzana, José;
2021

Abstract

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 line shape 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.
2021
magnetism RIXS cuprate
01 Pubblicazione su rivista::01a Articolo in rivista
Multiple-magnon excitations shape the spin spectrum of cuprate parent compounds / Betto, Davide; Fumagalli, Roberto; Martinelli, Leonardo; Rossi, Matteo; Piombo, Riccardo; Yoshimi, Kazuyoshi; Di Castro, Daniele; Di Gennaro, Emiliano; Sambri, Alessia; Bonn, Doug; Sawatzky, George A.; Braicovich, Lucio; Brookes, Nicholas B.; Lorenzana, José; Ghiringhelli, Giacomo. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 103:14(2021). [10.1103/PhysRevB.103.L140409]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1617842
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