Experimental Determination of Momentum-Resolved Electron-Phonon Coupling

Abstract

We provide a novel experimental method to quantitatively estimate the electron-phonon coupling and its momentum dependence from resonant inelastic x-ray scattering (RIXS) spectra based on the detuning of the incident photon energy away from an absorption resonance. We apply it to the cuprate parent compound NdBa${}_2$Cu${}_3$O${}_6$ and find that the electronic coupling to the oxygen half-breathing phonon mode is strongest at the Brillouin zone boundary, where it amounts to $\sim 0.17$ eV, in agreement with previous studies. In principle, this method is applicable to any absorption resonance suitable for RIXS measurements and will help to define the contribution of lattice vibrations to the peculiar properties of quantum materials.

6 pages, 3 figures

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• Probing light-driven quantum materials with ultrafast resonant inelastic X-ray scattering
• Charge order at high temperature in cuprate superconductors
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• LDA+DMFT approach to resonant inelastic x-ray scattering in correlated materials
• Multi-orbital charge density wave excitations and concomitant phonon anomalies in Bi${}_2$Sr${}_2$LaCuO${}_{6+\delta }$
• Ultrafast renormalization of the onsite Coulomb repulsion in a cuprate superconductor
• Enhanced electron-phonon coupling for charge-density-wave formation in La${}_{1.8-x}$Eu${}_{0.2}$Sr${}_x$CuO${}_{4+\delta }$
• Signature of quantum criticality in cuprates by charge density fluctuations
• Determining the Electron-Phonon Coupling in Superconducting Cuprates by Resonant Inelastic X-ray Scattering: Methods and Results on Nd${}_{1+x}$Ba${}_{2-x}$Cu${}_3$O${}_{7-\delta }$
• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
• Charge Order Lock-in by Electron-Phonon Coupling in La${}_{1.675}$Eu${}_{0.2}$Sr${}_{0.125}$CuO${}_4$
• High-resolution resonant inelastic x-ray scattering study of the electron-phonon coupling in honeycomb $\alpha$-Li${}_2$IrO${}_3$
• Stripe correlations in the two-dimensional Hubbard-Holstein model
• Generalization of the Franck-Condon model for phonon excitations by resonant inelastic X-ray scattering
• Fractional spin excitations in the infinite-layer cuprate CaCuO${}_2$
• Description of resonant inelastic x-ray scattering in correlated metals
• Probing electron-phonon interactions away from the Fermi level with resonant inelastic x-ray scattering
• Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates
• Disparate exciton-phonon couplings for zone center and boundary phonons in solid-state graphite
• Beyond the single-site approximation modeling of electron-phonon coupling effects on resonant inelastic X-ray scattering spectra
• Crystalline and magnetic structure of Ba2CuO3+δ investigated by x-ray absorption spectroscopy and resonant inelastic x-ray scattering
• Signatures of the Attractive Interaction in Spin Spectra of One-dimensional Cuprate Chains
• Theory of electron-phonon interactions in extended correlated systems probed by resonant inelastic x-ray scattering
• Paramagnon dispersion and damping in doped Na${}_x$Ca${}_{2-x}$CuO${}_2$Cl${}_2$
• Hybridization of lattice and charge order excitations in a superconducting cuprate
• Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides
• Evolution of the magnetic excitations in electron-doped ${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_4$
• Exploring charge and spin fluctuations in infinite-layer cuprate SrCuO${}_2$ from a phonon perspective
• Strong long-wavelength electron-phonon coupling in Ta${}_2$Ni(Se,S)${}_5$
• Dynamic charge order from strong correlations in the cuprates
• Superconducting phase diagram of multi-layer square-planar nickelates
• The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates
• Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface
• Theory of dispersive optical phonons in resonant inelastic x-ray scattering experiments
• Catalogue of phonon modes in several cuprate high-temperature superconductors from density functional theory