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

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 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

References in corpus (13)

• Anomalous High-Energy Spin Excitations in La2CuO4
• Spin excitations in a single La${}_2$CuO${}_4$ layer
• Quantum dynamics and entanglement of spins on a square lattice
• Nearly deconfined spinon excitations in the square-lattice spin-1/2 Heisenberg antiferromagnet
• A magnetic analog of the isotope effect in cuprates
• The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering
• Polarization resolved Cu $L_3$-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Observation of spin-orbit excitations and Hund's multiplets in Ca${}_2$RuO${}_4$
• High Tc superconductivity at the interface between the CaCuO2 and SrTiO3 insulating oxides
• Epitaxial engineering of flat silver fluorides cuprate analogs
• Momentum dependent light scattering in insulating cuprates
• Momentum-dependent light scattering in a 2D Heisenberg antiferromagnet
• Strong Three-magnon Scattering in Cuprates by Resonant X-rays

Cited by in corpus (20)

• Fractional spin excitations in the infinite-layer cuprate CaCuO${}_2$
• Unraveling higher-order corrections in the spin dynamics of RIXS spectra
• Update of $\mathcal{H}\Phi$: Newly added functions and methods in versions 2 and 3
• Single- and Multimagnon Dynamics in Antiferromagnetic $\alpha$-Fe${}_2$O${}_3$ Thin Films
• Low temperature magnetism of KAgF3
• Exploring d-Wave Magnetism in Cuprates from Oxygen Moments
• On the cuprates' universal waterfall feature: evidence of a momentum-driven crossover
• Cavity-Enhanced Optical Manipulation of Antiferromagnetic Magnon-Pairs
• Paramagnon dispersion and damping in doped Na${}_x$Ca${}_{2-x}$CuO${}_2$Cl${}_2$
• Magnon Spectra of Cuprates beyond Spin Wave Theory
• Theoretical analysis of multi-magnon excitations in resonant inelastic x-ray scattering spectra of two-dimensional antiferromagnets
• Evolution of the magnetic excitations in electron-doped ${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_4$
• Detection of a two-phonon mode in a cuprate superconductor via polarimetric RIXS
• Dynamic charge order from strong correlations in the cuprates
• Observation of spin-conserving two-spinon continuum in the $S$=1/2 antiferromagnetic chain system Sr${}_2$CuO${}_3$ using Cu $K$-edge resonant inelastic x-ray scattering
• Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface
• Bimagnon dispersion of La2CuO4 probed by resonant inelastic X-ray scattering
• Evaluating covalency using RIXS spectral weights: Silver fluorides vs. cuprates
• Multimagnon and multispinon $L_3$-edge RIXS spectra of an effective ${\tilde{J}}_1-{\tilde{J}}_2-{\tilde{J}}_3$ square lattice Heisenberg model
• Elementary excitations in undoped layered cuprates