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

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • I. A. Nekrasov - , Russian Academy of Sciences (Author)
  • N. S. Pavlov - , Russian Academy of Sciences (Author)
  • E. Z. Kuchinskii - , Russian Academy of Sciences (Author)
  • M. V. Sadovskii - , Russian Academy of Sciences (Author)
  • Z. V. Pchelkina - , RAS - Mikheev Institute of Metal Physics, Ural Branch (Author)
  • V. B. Zabolotnyy - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • J. Geck - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • B. Buechner - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • S. V. Borisenko - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • D. S. Inosov - , Leibniz Institute for Solid State and Materials Research Dresden, Max Planck Institute for Gravitational Physics (Albert Einstein Institute) (Author)
  • A. A. Kordyuk - , National Academy of Sciences of Ukraine (Author)
  • M. Lambacher - , Walther Meissner Institute (WMI) (Author)
  • A. Erb - , Walther Meissner Institute (WMI) (Author)

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

Original languageEnglish
Article number140510
Number of pages4
JournalPhysical Review B
Volume80
Issue number14
Publication statusPublished - Oct 2009
Peer-reviewedYes
Externally publishedYes

External IDs

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

Keywords

Keywords

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

Library keywords