Experimental Determination of Momentum-Resolved Electron-Phonon Coupling
Journal article, 2019
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 NdBa2Cu3O6 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 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.
Author
Matteo Rossi
Polytechnic University of Milan
Max Planck Society
Riccardo Arpaia
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Polytechnic University of Milan
Roberto Fumagalli
Polytechnic University of Milan
Marco Moretti Sala
Polytechnic University of Milan
Davide Betto
European Synchrotron Radiation Facility (ESRF)
Kurt Kummer
European Synchrotron Radiation Facility (ESRF)
Gabriella M. De Luca
University of Naples Federico II
CNR - SuPerconducting and other INnovative materials and devices institute, Napoli
J. van den Brink
Technische Universität Dresden
Leibniz Institute for Solid State and Materials Research Dresedn
Marco Salluzzo
CNR - SuPerconducting and other INnovative materials and devices institute, Napoli
Nicholas B. Brookes
European Synchrotron Radiation Facility (ESRF)
Lucio Braicovich
Polytechnic University of Milan
European Synchrotron Radiation Facility (ESRF)
Giacomo Ghiringhelli
Polytechnic University of Milan
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 123 2 027001Subject Categories
Atom and Molecular Physics and Optics
Other Physics Topics
Condensed Matter Physics
DOI
10.1103/PhysRevLett.123.027001