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Electronic structure of Pr2xCexCuO4 studied via ARPES and LDA+DMFT+Σk

I. A. Nekrasov, N. S. Pavlov, E. Z. Kuchinskii, M. V. Sadovskii, Z. V. Pchelkina, V. B. Zabolotnyy, J. Geck, B. Büchner, S. V. Borisenko, D. S. Inosov, A. A. Kordyuk, M. Lambacher, and A. Erb
Phys. Rev. B 80, 140510(R) – Published 22 October 2009

Abstract

The electron-doped Pr2xCexCuO4 (PCCO) compound in the pseudogap regime (x0.15) was investigated using the angle-resolved photoemission spectroscopy and the generalized dynamical mean-field theory (DMFT) with the k-dependent self-energy (LDA+DMFT+Σk). 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 Σk 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.

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  • Received 24 June 2009

DOI:https://doi.org/10.1103/PhysRevB.80.140510

©2009 American Physical Society

Authors & Affiliations

I. A. Nekrasov, N. S. Pavlov, E. Z. Kuchinskii, and M. V. Sadovskii

  • Institute for Electrophysics, Russian Academy of Sciences, Ekaterinburg 620016, Russia

Z. V. Pchelkina

  • Institute for Metal Physics, Russian Academy of Sciences, Ekaterinburg 620219, Russia

V. B. Zabolotnyy, J. Geck, B. Büchner, and S. V. Borisenko

  • Institute for Solid State Research, IFW-Dresden, P.O. Box 270116, D-01171 Dresden, Germany

D. S. Inosov

  • Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
  • and Institute for Solid State Research, IFW-Dresden, P.O. Box 270116, D-01171 Dresden, Germany

A. A. Kordyuk

  • Institute for Solid State Research, IFW-Dresden, P.O. Box 270116, D-01171 Dresden, Germany
  • and Institute of Metal Physics of National Academy of Sciences of Ukraine, 03142 Kyiv, Ukraine

M. Lambacher and A. Erb

  • Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner Strasse 8, 85748 Garching, Germany

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Issue

Vol. 80, Iss. 14 — 1 October 2009

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