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Elemental substitution effects in high-critical temperature superconductor YBCO.

Author(s) : ZHANG Q. R., XU Z. A., WANG J. S., TAN M. Q., FANG M. H., ZHANG H., HE Z. H.

Type of article: Article

Summary

The paper reports the experimental results of an investigation into elemental substitution effects in YBCO(-) and the new physical ideas deduced comprehensively. It is shown that all the orthorhombic crystalline structure, oxygen content, oxidation valence of copper atoms, and metal-semiconductor (insulator) transition are only the extrinsic factors determining the critical temperature of the systems, and there are two mechanisms of substitution effects, namely the mechanism of the substitution effects outside the copper-oxygen planes and that within the copper-oxygen planes. The authors suggest that the mobile carrier concentration and the dynamic, short-range anti-ferromagnetic correlation between copper(2) atoms on the copper-oxygen planes are the two intrinsic factors determining the high-critical temperature superconductivity.

Details

  • Original title: Elemental substitution effects in high-critical temperature superconductor YBCO.
  • Record ID : 1994-2754
  • Languages: English
  • Source: Sci. China, A - vol. 36 - n. 11
  • Publication date: 1993/11
  • Document available for consultation in the library of the IIR headquarters only.

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