Evidence for Weakly Correlated Oxygen Holes in the Highest-Tc Cuprate Superconductor HgBa2Ca2Cu3O8+δ - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2017

Evidence for Weakly Correlated Oxygen Holes in the Highest-Tc Cuprate Superconductor HgBa2Ca2Cu3O8+δ

Muriel Sicot
Yannick Fagot-Revurat
Guillaume Vasseur
  • Fonction : Auteur
  • PersonId : 776848
  • IdRef : 182230902
Julien Granet
  • Fonction : Auteur
  • PersonId : 1102712
Bertrand Kierren
Luc Moreau
Daniel Malterre

Résumé

We study the electronic structure of HgBa 2 Ca 2 Cu 3 O 8þδ (Hg1223; T c ¼ 134 K) using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). Resonant valence band PES across the O K edge and Cu L edge identifies correlation satellites originating in O 2p and Cu 3d two-hole final states, respectively. Analyses using the experimental O 2p and Cu 3d partial density of states show quantitatively different on-site Coulomb energy for the Cu site (U dd ¼ 6.5 AE 0.5 eV) and O site (U pp ¼ 1.0 AE 0.5 eV). Cu 2 O 7-cluster calculations with nonlocal screening explain the Cu 2p core level PES and Cu Ledge XAS spectra, confirm the U dd and U pp values, and provide evidence for the Zhang-Rice singlet state in Hg1223. In contrast to other hole-doped cuprates and 3d-transition metal oxides, the present results indicate weakly correlated oxygen holes in Hg1223.
Fichier principal
Vignette du fichier
PhysRevLett.119.057001.pdf (919.14 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04134046 , version 1 (20-06-2023)

Licence

Paternité

Identifiants

Citer

Ashish Chainani, Muriel Sicot, Yannick Fagot-Revurat, Guillaume Vasseur, Julien Granet, et al.. Evidence for Weakly Correlated Oxygen Holes in the Highest-Tc Cuprate Superconductor HgBa2Ca2Cu3O8+δ. Physical Review Letters, 2017, 119 (5), pp.057001. ⟨10.1103/physrevlett.119.057001⟩. ⟨hal-04134046⟩
17 Consultations
10 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More