Impact Factor:0.0
DOI number:10.1103/PhysRevLett.125.097002
Journal:Physical Review Letters
Abstract:Charge density wave (CDW) correlations are prevalent in all copper-oxide superconductors. While CDWs in conventional metals are driven by coupling between lattice vibrations and electrons, the role of the electron-phonon coupling (EPC) in cuprate CDWs is strongly debated. Using Cu L3 edge resonant inelastic x-ray scattering, we study the CDW and Cu-O bond-stretching phonons in the stripe-ordered cuprate La1.8−xEu0.2SrxCuO4+δ. We investigate the interplay between charge order and EPC as a function of doping and temperature and find that the EPC is enhanced in a narrow momentum region around the CDW ordering vector. By detuning the incident photon energy from the absorption resonance, we extract an EPC matrix element at the CDW ordering vector of M≃0.36 eV, which decreases to M≃0.30 eV at high temperature in the absence of the CDW. Our results suggest a feedback mechanism in which the CDW enhances the EPC which, in turn, further stabilizes the CDW.
Indexed by:Journal paper
Discipline:Natural Science
First-Level Discipline:Physics
Volume:125
Page Number:097002
Translation or Not:no
Date of Publication:2020-08-25
Included Journals:SCI
First Author:Y. Y. Peng
Correspondence Author:P. Abbamonte
All the Authors:I. Jarrige,V. Bisogni,A. A. Husain,M. Mitrano,S. X.-L. Sun,T. A. Johnson,A. V. Zakrzewski,G. J. MacDougall,A. Barbour
Date of Publication:2020-08-25