Experimental Determination of Momentum-Resolved Electron-Phonon Coupling
Artikel i vetenskaplig tidskrift, 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.
Författare
Matteo Rossi
Politecnico di Milano
Max-Planck-Gesellschaft
Riccardo Arpaia
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Politecnico di Milano
Roberto Fumagalli
Politecnico di Milano
Marco Moretti Sala
Politecnico di Milano
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-Institut für Festkörper- und Werkstoffforschung Dresden
Marco Salluzzo
CNR - SuPerconducting and other INnovative materials and devices institute, Napoli
Nicholas B. Brookes
European Synchrotron Radiation Facility (ESRF)
Lucio Braicovich
Politecnico di Milano
European Synchrotron Radiation Facility (ESRF)
Giacomo Ghiringhelli
Politecnico di Milano
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 123 2 027001Ämneskategorier
Atom- och molekylfysik och optik
Annan fysik
Den kondenserade materiens fysik
DOI
10.1103/PhysRevLett.123.027001