Experimental Determination of Momentum-Resolved Electron-Phonon Coupling

Matteo Rossi, Riccardo Arpaia, Roberto Fumagalli, Marco Moretti Sala, Davide Betto, Kurt Kummer, Gabriella M. De Luca, Jeroen van den Brink, Marco Salluzzo, Nicholas B. Brookes, Lucio Braicovich, and Giacomo Ghiringhelli
Phys. Rev. Lett. 123, 027001 – Published 8 July 2019
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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 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 0.17eV, 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.

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  • Received 26 February 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.027001

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Matteo Rossi1,*, Riccardo Arpaia1,2, Roberto Fumagalli1, Marco Moretti Sala1, Davide Betto3,†, Kurt Kummer3, Gabriella M. De Luca4,5, Jeroen van den Brink6,7, Marco Salluzzo5, Nicholas B. Brookes3, Lucio Braicovich1,3, and Giacomo Ghiringhelli1,8,‡

  • 1Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy
  • 2Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-41296 Göteborg, Sweden
  • 3ESRF—The European Synchrotron, 71 Avenue des Martyrs, CS 40220, F-38043 Grenoble, France
  • 4Dipartimento di Fisica “E. Pancini,” Università degli Studi di Napoli “Federico II,” Complesso Monte Sant’Angelo—Via Cinthia, I-80126 Napoli, Italy
  • 5CNR-SPIN, Complesso Monte Sant’Angelo—Via Cinthia, I-80126 Napoli, Italy
  • 6Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany
  • 7Department of Physics, Technical University Dresden, D-01062 Dresden, Germany
  • 8CNR-SPIN, Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy

  • *matteo1.rossi@polimi.it
  • Present address: Max Planck Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany.
  • giacomo.ghiringhelli@polimi.it

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Issue

Vol. 123, Iss. 2 — 12 July 2019

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