Electronic structure of Pr(2-x)CexCuO(4) studied via ARPES and LDA plus DMFT+Sigma(k)

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • I. A. Nekrasov - , Russian Academy of Sciences (Autor:in)
  • N. S. Pavlov - , Russian Academy of Sciences (Autor:in)
  • E. Z. Kuchinskii - , Russian Academy of Sciences (Autor:in)
  • M. V. Sadovskii - , Russian Academy of Sciences (Autor:in)
  • Z. V. Pchelkina - , RAS - Mikheev Institute of Metal Physics, Ural Branch (Autor:in)
  • V. B. Zabolotnyy - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • J. Geck - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • B. Buechner - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • S. V. Borisenko - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (Autor:in)
  • D. S. Inosov - , Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Max Planck Institute for Gravitational Physics (Albert Einstein Institute) (Autor:in)
  • A. A. Kordyuk - , National Academy of Sciences of Ukraine (Autor:in)
  • M. Lambacher - , Walther-Meissner-Institut (WMI) (Autor:in)
  • A. Erb - , Walther-Meissner-Institut (WMI) (Autor:in)

Abstract

The electron-doped Pr2-xCexCuO4 (PCCO) compound in the pseudogap regime (x approximate to 0.15) was investigated using the angle-resolved photoemission spectroscopy and the generalized dynamical mean-field theory (DMFT) with the k-dependent self-energy (LDA+DMFT+Sigma(k)). Model parameters (hopping integral values and local Coulomb interaction strength) for the effective one-band Hubbard model were calculated by the local-density approximation (LDA) with numerical renormalization-group method employed as an "impurity solver" in DMFT computations. An "external" k-dependent self-energy Sigma(k) was used to describe interaction of correlated conducting electrons with short-range antiferromagnetic (AFM) pseudogap fluctuations. Both experimental and theoretical spectral functions and Fermi surfaces were obtained and compared demonstrating a good semiquantitative agreement. For both experiment and theory normal-state spectra of nearly optimally doped PCCO show clear evidence for a pseudogap state with AFM-like nature. Namely, folding of quasiparticle bands as well as the presence of the "hot spots" and "Fermi arcs" was observed.

Details

OriginalspracheEnglisch
Aufsatznummer140510
Seitenumfang4
FachzeitschriftPhysical Review B
Jahrgang80
Ausgabenummer14
PublikationsstatusVeröffentlicht - Okt. 2009
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

Scopus 71249089526
ORCID /0000-0002-2438-0672/work/142253068

Schlagworte

Schlagwörter

  • HIGH-TEMPERATURE SUPERCONDUCTORS, RENORMALIZATION-GROUP APPROACH, DILUTE MAGNETIC-ALLOYS, ANDERSON MODEL, CUPRATE SUPERCONDUCTORS, PSEUDOGAP BEHAVIOR, STATIC PROPERTIES, DENSITY, PHASE, FLUCTUATIONS

Bibliotheksschlagworte