Pr-induced superconductivity suppression in Y x Pr 1-x Ba 2 Cu 4 O 8 probed by soft-X-ray absorption spectroscopy: A comparative studies of Y x Pr 1-x Ba 2 Cu 4 O 8 and Y x Pr 1-x Ba 2 Cu 3 O 7

J. M. Chen, S. J. Liu, J. M. Lee, I. P. Hong, J. Y. Lin, Y. S. Gou, H. D. Yang

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Abstract

The variation of hole states with Pr doping for Y x Pr 1-x Ba 2 Cu 3 O 7 and Y x Pr 1-x Ba 2 Cu 4 O 8 has been investigated by O K-edge X-ray absorption spectroscopy. Upon Pr substitution, T c suppression rate in Y x Pr 1-x Ba 2 Cu 4 O 8 is slower than that in Y x Pr 1-x Ba 2 Cu 3 O 7 . For both systems, hole carriers in the CuO 2 planes and CuO chains decrease monotonically with increasing Pr doping level. The depletion rate of hole carriers in the CuO 2 planes with Pr doping in Y x Pr 1-x Ba 2 Cu 4 O 8 is considerably slower than that in Y x Pr 1-x Ba 2 Cu 3 O 7 . The oxygen content affects the depletion rate of hole carriers in cuprates with Pr doping.

Original languageEnglish
Pages (from-to)180-187
Number of pages8
JournalChemical Physics Letters
Volume370
Issue number1-2
DOIs
Publication statusPublished - 2003 Mar 7

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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