Polarization resolved Cu $L_3$-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa${}_2$Cu${}_3$O${}_{7-\delta }$

Abstract

High resolution resonant inelastic x-ray scattering (RIXS) has proven particularly effective in the determination of crystal field and spin excitations in cuprates. Its strength lies in the large Cu $L_3$ resonance and in the fact that the scattering cross section follows quite closely the single-ion model predictions, both in the insulating parent compounds and in the superconducting doped materials. However, the spectra become increasingly broader with (hole) doping, hence resolving and assigning spectral features has proven challenging even with the highest energy resolution experimentally achievable. Here we have overcome this limitation by measuring the complete polarization dependence of the RIXS spectra as function of momentum transfer and doping in thin films of NdBa${}_2$Cu${}_3$O${}_{7-\delta }$. Besides confirming the previous assignment of $dd$ and spin excitations (magnon, bimagnon) in the antiferromagnetic insulating parent compound, we unequivocally single out the actual spin-flip contribution at all dopings. We also demonstrate that the softening of $dd$ excitations is mainly attributed to the shift of the $xy$ peak to lower energy loss. These results provide a definitive assessment of the RIXS spectra of cuprates and demonstrate that RIXS measurements with full polarization control are practically feasible and highly informative.

14 pages, 10 figures

References in corpus (11)

• Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
• Two-Orbital Model Explains the Higher Transition Temperature of the Single-Layer Hg-Cuprate Superconductor Compared to That of the La-Cuprate Superconductor
• Dispersive charge density wave excitations and temperature dependent commensuration in Bi2Sr2CaCu2O8+δ
• High-energy spin and charge excitations in electron-doped copper oxide superconductors
• High-energy magnetic excitations in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$: Towards a unified description of the electronic and magnetic degrees of freedom in the cuprates
• Momentum Dependence of Charge Excitations in the Electron-Doped Superconductor Nd1.85Ce0.15CuO4: a RIXS Study
• The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering
• Crossover from Collective to Incoherent Spin Excitations in Superconducting Cuprates Probed by Detuned Resonant Inelastic X-ray Scattering
• Resolving the nature of electronic excitations in resonant inelastic x-ray scattering
• A determination of the pairing interaction in the high Tc cuprate superconductor Tl2Ba2CaCu2O8 (Tl2212)
• Electronic and magnetic excitations in the "half-stuffed" Cu--O planes of Ba${}_2$Cu${}_3$O${}_4$Cl${}_2$ measured by resonant inelastic x-ray scattering

Cited by in corpus (23)

• Electronic and magnetic excitations in La${}_3$Ni${}_2$O${}_7$
• Experimental Determination of Momentum-Resolved Electron-Phonon Coupling
• Superconductivity in high-$T_c$ and related strongly correlated systems from variational perspective: Beyond mean field theory
• Signature of quantum criticality in cuprates by charge density fluctuations
• Gapped collective charge excitations and interlayer hopping in cuprate superconductors
• High-resolution resonant inelastic x-ray scattering study of the electron-phonon coupling in honeycomb $\alpha$-Li${}_2$IrO${}_3$
• Mobile orbitons in Ca${}_2$CuO${}_3$: crucial role of the Hund's exchange
• Collective nature of orbital excitations in layered cuprates in the absence of apical oxygens
• Plasmon dispersion in bilayer cuprate superconductors
• Orbital Symmetry and Orbital Excitations in High-$T_c$ Superconductors
• Unravelling the Nature of Spin Excitations Disentangled from Charge Contributions in a Doped Cuprate Superconductor
• Paramagnon dispersion and damping in doped Na${}_x$Ca${}_{2-x}$CuO${}_2$Cl${}_2$
• Universal collective modes from strong electronic correlations: Modified $1/{\mathcal{N}}_f$ theory with application to high-$T_c$ cuprates
• Capping effects on spin and charge excitations in parent and superconducting Nd1-xSrxNiO2
• 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
• Collective spin and charge excitations in the $t$-$J$-$U$ model of high-$T_c$ cuprates
• Dynamic charge order from strong correlations in the cuprates
• Polarization dependency in Resonant Inelastic X-Ray Scattering
• Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface
• Electron-hole asymmetry of quantum collective excitations in high-$T_c$ copper oxides
• Probing d-wave superconducting gap of high-$T_{\mathrm{c}}$ cuprate ${\mathrm{Bi}}_2{\mathrm{Sr}}_2{\mathrm{Ca}}_2{\mathrm{Cu}}_3{\mathrm{O}}_{10+\delta }$ by resonant inelastic X-ray scattering