Experimental Determination of Momentum-Resolved Electron-Phonon Coupling.

  title={Experimental Determination of Momentum-Resolved Electron-Phonon Coupling.},
  author={Matteo Rossi and Riccardo Arpaia and Roberto Fumagalli and Marco Moretti Sala and Davide Betto and Kurt Kummer and G. M. De Luca and Jeroen van den Brink and Marco Salluzzo and Nicholas B. Brookes and Lucio Braicovich and Giacomo Ghiringhelli},
  journal={Physical review letters},
  volume={123 2},
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 branch is strongest at the Brillouin zone boundary, where it amounts to ∼0.17  eV, in agreement… 

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