Effect of impurity on anisotropy of high-TC superconductivity in YBa2(Cu1-xZnx)3O7-δ single crystals

K. Semba, A. Matsuda

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1 Citation (Scopus)

Abstract

The effect of Zn doping on anisotropy of high-Tc superconductivity is studied in single-crystal YBa2(Cu1-xZnx)3O7-δ (YBCZO) within the range 0<x<0.03. The resistive transition curves under a magnetic field for these impurity-containing systems are successfully described for the first time by the renormalized fluctuation theory including ψ4 term. The derived coherence length ratio ξabc, which indicates anisotropy in superconductivity, decreases as the impurity concentration increases. However, both ρ{variant}c and the normal state anisotropy ρ{variant}c/ρ{variant}ab increase. This situation is not consistent with the Lawrence-Doniach (LD) model. The anisotropic 3-D metal model seems to be appropriate for the YBCZO system. This result excludes certain types of high-TC theories which assume strict two dimensionality of the electronic system.

Original languageEnglish
Pages (from-to)1955-1956
Number of pages2
JournalPhysica B: Physics of Condensed Matter
Volume194-196
Issue numberPART 2
DOIs
Publication statusPublished - 1994 Feb 2
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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