Ordering in high-Tc superconducting systems: Effective pair interactions in Y-Ba-Cu-O

L. Szunyogh, P. Weinberger

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Effective pair interactions are examined in the nonstoichiometric as well as the Zn-doped Y-Ba-Cu-O systems in terms of the real-space-scattering-cluster coherent-potential approximation. Large negative pair energies are found for the first and second in-chain neighbors if vacancies occupy the O(1) sublattice, while concomitantly rather small positive pair energies characterize the interchain neighbors. Negative pair energies are also found for a disordered O(2) sublattice, if a copper atom bridges the two sites. This result is in good agreement with experiment and with other calculations. For the Zn-doped copper sublattices no such clear-cut behavior is observed with regard to the possible ordering of sites occupied by Cu or Zn atoms.

Original languageEnglish
Pages (from-to)3768-3770
Number of pages3
JournalPhysical Review B
Volume43
Issue number4
DOIs
Publication statusPublished - Jan 1 1991

ASJC Scopus subject areas

  • Condensed Matter Physics

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