Doping evolution of Zhang-Rice singlet spectral weight: A comprehensive examination by x-ray absorption spectroscopy

Y. J. Chen, M. G. Jiang, Chih-Wei Luo, Jiunn-Yuan Lin, Kaung-Hsiung Wu, J. M. Lee, J. M. Chen, Y. K. Kuo, Jenh-Yih Juang, Chung Yu Mou

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12 Scopus citations

Abstract

The total spectral weight S of the emergent low-energy quasiparticles in high-temperature superconductors (HTSCs) is explored by x-ray absorption spectroscopy. In order to examine the applicability of the Hubbard model, regimes that cover from zero doping to overdoping are investigated. In contrast to results of mean-field theory, we found that S deviates from linear dependence on the doping level p. The slope of S versus p changes continuously throughout the whole doping range with no sign of saturation up to p=0.23. Therefore, the picture of the Zhang-Rice singlet remains intact within the most prominent doping regimes of HTSCs.

Original languageEnglish
Article number134525
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number13
DOIs
StatePublished - 31 Oct 2013

Keywords

  • ELECTRONIC-STRUCTURE
  • DOPED HOLES
  • SUPERCONDUCTOR
  • OXYGEN

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