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
Max Planck Society
Polytechnic University of Milan
Riccardo Arpaia
Polytechnic University of Milan
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
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
National Research Council of Italy (CNR)
J. van den Brink
Leibniz Institute for Solid State and Materials Research Dresedn
Technische Universität Dresden
Marco Salluzzo
National Research Council of Italy (CNR)
Nicholas B. Brookes
European Synchrotron Radiation Facility (ESRF)
Lucio Braicovich
European Synchrotron Radiation Facility (ESRF)
Polytechnic University of Milan
Giacomo Ghiringhelli
Polytechnic University of Milan
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 123 2 027001Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
Other Physics Topics
Condensed Matter Physics
DOI
10.1103/PhysRevLett.123.027001