Structural anomalies at the disappearance of superconductivity in Ba2YCu3O7-δ: Evidence for charge transfer from chains to planes

R. J. Cava, B. Batlogg, K. M. Rabe, E. A. Rietman, P. K. Gallagher, L. W. Rupp

Research output: Contribution to journalArticlepeer-review

245 Scopus citations

Abstract

In systematic studies of oxygen-deficient Ba2YCu3O7-δ, we have found that a structural anomaly occurs at the composition where bulk superconductivity disappears. The observed step-like increase in the c lattice parameter, when associated with changes in the atomic positions within the unit cell, indicates that superconductivity is lost due to a charge redistribution from the copper-oxygen chains to the copper-oxygen planes. This is microscopic experimental evidence establishing the role of secondary structural elements in the layered copper-oxide high-Tc superconductors.

Original languageEnglish (US)
Pages (from-to)523-527
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume156
Issue number4
DOIs
StatePublished - Nov 1 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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