Study of the midgap state in oxide superconductors by composite operator approach

M. Sasaki, S. Ishihara, H. Matsumoto, M. Tachiki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Nature of the midgap state, which develops in the charge transfer gap of oxide superconductors with hole doping, is studied by use of the p-d mixing model with and without the interatomic short distance Coulomb interaction (V-term). Composite operators representing electronic excitations associated with Cu-O bonds are introduced and a generalized mean field theory is developed. The doping dependence of the electronic state can be well described by this approach.

Original languageEnglish
Pages (from-to)1491-1492
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume185-189
Issue numberPART 3
DOIs
Publication statusPublished - 1991 Dec 1

ASJC Scopus subject areas

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

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