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

Universita degli Studi di Napoli 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 027001

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Condensed Matter Physics

DOI

10.1103/PhysRevLett.123.027001

More information

Latest update

11/19/2019