X-Ray Absorption Spectra Reveal the Inapplicability of the Single-Band Hubbard Model to Overdoped Cuprate Superconductors

D. C. Peets, D. G. Hawthorn, K. M. Shen, Young-June Kim, D. S. Ellis, H. Zhang, Seiki Komiya, Yoichi Ando, G. A. Sawatzky, Ruixing Liang, D. A. Bonn, and W. N. Hardy
Phys. Rev. Lett. 103, 087402 – Published 19 August 2009; Erratum Phys. Rev. Lett. 104, 169903 (2010)

Abstract

X-ray absorption spectra on the overdoped high-temperature superconductors Tl2Ba2CuO6+δ and La2xSrxCuO4±δ reveal a striking departure in the electronic structure from that of the underdoped regime. The upper Hubbard band, identified with strong correlation effects, is not observed on the oxygen K edge, while the lowest-energy prepeak gains less intensity than expected above p0.21. This suggests a breakdown of the Zhang-Rice singlet approximation and a loss of correlation effects or a significant shift in the most fundamental parameters of the system, rendering single-band Hubbard models inapplicable. Such fundamental changes suggest that the overdoped regime may offer a distinct route to understanding in the cuprates.

  • Figure
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  • Received 21 April 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.087402

©2009 American Physical Society

Erratum

Erratum: X-Ray Absorption Spectra Reveal the Inapplicability of the Single-Band Hubbard Model to Overdoped Cuprate Superconductors [Phys. Rev. Lett. 103, 087402 (2009)]

D. C. Peets, D. G. Hawthorn, K. M. Shen, Young-June Kim, D. S. Ellis, H. Zhang, Seiki Komiya, Yoichi Ando, G. A. Sawatzky, Ruixing Liang, D. A. Bonn, and W. N. Hardy
Phys. Rev. Lett. 104, 169903 (2010)

Authors & Affiliations

D. C. Peets1,*, D. G. Hawthorn2, K. M. Shen3, Young-June Kim4, D. S. Ellis4, H. Zhang4, Seiki Komiya5, Yoichi Ando6, G. A. Sawatzky7, Ruixing Liang7, D. A. Bonn7, and W. N. Hardy7

  • 1Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
  • 2Department of Physics & Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
  • 3Department of Physics, Cornell University, Ithaca, New York 14853, USA
  • 4Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada
  • 5Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan
  • 6Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
  • 7Canadian Institute for Advanced Research, Canada, and Department of Physics & Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1, Canada

  • *dpeets@scphys.kyoto-u.ac.jp

Comments & Replies

Comment on “X-ray Absorption Spectra Reveal the Inapplicability of the Single-Band Hubbard Model to Overdoped Cuprate Superconductors”

Philip Phillips and Mark Jarrell
Phys. Rev. Lett. 105, 199701 (2010)

Peets et al. Reply:

D. C. Peets, D. G. Hawthorn, K. M. Shen, G. A. Sawatzky, Ruixing Liang, D. A. Bonn, and W. N. Hardy
Phys. Rev. Lett. 105, 199702 (2010)

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Vol. 103, Iss. 8 — 21 August 2009

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