Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2022

Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides

Laura Chaix
Hu Miao
  • Fonction : Auteur
  • PersonId : 991851
Alessandro Nicolaou
  • Fonction : Auteur
  • PersonId : 991846
Stéphane Grenier
Matteo d'Astuto

Résumé

Bulk charge density waves (CDWs) are now reported in nearly all high-temperature superconducting (HTS) cuprates, with the noticeable exception of one particular family: the copper oxychlorides. Here, we used resonant inelastic X-ray scattering (RIXS) to reveal a bulk CDW in these materials. Combining RIXS with non-resonant IXS, we investigate the interplay between the lattice excitations and the CDW, and evidence bond-stretching (BS) phonon anomalies at the CDW wave-vector. We propose that such electron-phonon anomalies occur in the presence of dispersive charge excitations emanating from the CDW and interacting with the BS phonon. Our observations in a structurally simple cuprate promises to better connect bulk and surface properties and bridge the gap between theory and experiment.
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Dates et versions

hal-03619987 , version 1 (28-03-2022)
hal-03619987 , version 2 (26-04-2022)

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Laura Chaix, Blair W. Lebert, Hu Miao, Alessandro Nicolaou, Flora Yakhou, et al.. Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides. 2022. ⟨hal-03619987v1⟩
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