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Universal Waterfall Feature in Cuprate Superconductors : Evidence of a Momentum-Driven Crossover

Bacq-Labreuil, Benjamin ; Fawaz, Chafic ; Okazaki, Yuichi ; Obata, Yukiko ; Cercellier, Hervé ; Le Fèvre, Patrick ; Bertran, François ; Santos-Cottin, David ; Yamamoto, Hajime and Yamada, Ikuya , et al. (2025) In Physical Review Letters 134(1).
Abstract

We study two related universal anomalies of the spectral function of cuprates, so-called waterfall and high-energy kink features, by a combined cellular dynamical mean-field theory and angle-resolved photoemission study for the oxychloride NaxCa2-xCuO2Cl2 (Na-CCOC). Tracing their origin back to an interplay of spin-polaron and local-correlation effects both in undoped and hole-doped (Na-)CCOC, we establish them as a universal crossover between regions differing in the momentum dependence of the coupling and not necessarily in the related quasiparticles' energies. The proposed scenario extends to doping levels coinciding with the cuprate's superconducting dome and motivates further investigations of the fate of spin polarons in the... (More)

We study two related universal anomalies of the spectral function of cuprates, so-called waterfall and high-energy kink features, by a combined cellular dynamical mean-field theory and angle-resolved photoemission study for the oxychloride NaxCa2-xCuO2Cl2 (Na-CCOC). Tracing their origin back to an interplay of spin-polaron and local-correlation effects both in undoped and hole-doped (Na-)CCOC, we establish them as a universal crossover between regions differing in the momentum dependence of the coupling and not necessarily in the related quasiparticles' energies. The proposed scenario extends to doping levels coinciding with the cuprate's superconducting dome and motivates further investigations of the fate of spin polarons in the superconducting phase.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
134
issue
1
article number
016502
publisher
American Physical Society
external identifiers
  • scopus:85214676042
  • pmid:39913722
ISSN
0031-9007
DOI
10.1103/PhysRevLett.134.016502
language
English
LU publication?
yes
id
5ec0ff86-7839-4cbf-84ca-29baf551ff5b
date added to LUP
2025-03-14 14:51:15
date last changed
2025-07-05 01:15:10
@article{5ec0ff86-7839-4cbf-84ca-29baf551ff5b,
  abstract     = {{<p>We study two related universal anomalies of the spectral function of cuprates, so-called waterfall and high-energy kink features, by a combined cellular dynamical mean-field theory and angle-resolved photoemission study for the oxychloride NaxCa2-xCuO2Cl2 (Na-CCOC). Tracing their origin back to an interplay of spin-polaron and local-correlation effects both in undoped and hole-doped (Na-)CCOC, we establish them as a universal crossover between regions differing in the momentum dependence of the coupling and not necessarily in the related quasiparticles' energies. The proposed scenario extends to doping levels coinciding with the cuprate's superconducting dome and motivates further investigations of the fate of spin polarons in the superconducting phase.</p>}},
  author       = {{Bacq-Labreuil, Benjamin and Fawaz, Chafic and Okazaki, Yuichi and Obata, Yukiko and Cercellier, Hervé and Le Fèvre, Patrick and Bertran, François and Santos-Cottin, David and Yamamoto, Hajime and Yamada, Ikuya and Azuma, Masaki and Horiba, Koji and Kumigashira, Hiroshi and D'Astuto, Matteo and Biermann, Silke and Lenz, Benjamin}},
  issn         = {{0031-9007}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Universal Waterfall Feature in Cuprate Superconductors : Evidence of a Momentum-Driven Crossover}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.134.016502}},
  doi          = {{10.1103/PhysRevLett.134.016502}},
  volume       = {{134}},
  year         = {{2025}},
}