Momentum-Resolved Electronic Structure of the High-Tc Superconductor Parent Compound BaBiO3

N. C. Plumb, D. J. Gawryluk, Y. Wang, Z. Ristić, J. Park, B. Q. Lv, Z. Wang, C. E. Matt, N. Xu, T. Shang, K. Conder, J. Mesot, S. Johnston, M. Shi, and M. Radović
Phys. Rev. Lett. 117, 037002 – Published 12 July 2016
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Abstract

We investigate the band structure of BaBiO3, an insulating parent compound of doped high-Tc superconductors, using in situ angle-resolved photoemission spectroscopy on thin films. The data compare favorably overall with density functional theory calculations within the local density approximation, demonstrating that electron correlations are weak. The bands exhibit Brillouin zone folding consistent with known BiO6 breathing distortions. Though the distortions are often thought to coincide with Bi3+/Bi5+ charge ordering, core level spectra show that bismuth is monovalent. We further demonstrate that the bands closest to the Fermi level are primarily oxygen derived, while the bismuth 6s states mostly contribute to dispersive bands at deeper binding energy. The results support a model of Bi-O charge transfer in which hole pairs are localized on combinations of the O 2p orbitals.

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  • Received 3 March 2016

DOI:https://doi.org/10.1103/PhysRevLett.117.037002

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

N. C. Plumb1,*, D. J. Gawryluk2,†, Y. Wang3, Z. Ristić1, J. Park1, B. Q. Lv4,1, Z. Wang1,5, C. E. Matt1, N. Xu1, T. Shang2, K. Conder2, J. Mesot6,7,8, S. Johnston3, M. Shi1, and M. Radović1,9

  • 1Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
  • 2Laboratory for Scientific Developments and Novel Materials, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
  • 3Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200, USA
  • 4Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 5Department of Quantum Matter Physics, 24 Quai Ernest-Ansermet, 1211 Geneva 4, Switzerland
  • 6Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
  • 7Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
  • 8Laboratory for Solid State Physics, ETH Zürich, CH-8093 Zürich, Switzerland
  • 9SwissFEL, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

  • *nicholas.plumb@psi.ch
  • On leave from Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02-668 Warsaw, Poland.

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Issue

Vol. 117, Iss. 3 — 15 July 2016

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