Effective Hamiltonian and electronic states in oxide superconductors

S. Ishihara, H. Matsumoto, M. Tachiki

Research output: Contribution to journalArticlepeer-review


The electronic states near the Fermi level in insulator-metal transition region of p-type oxide superconductors are studied in an effective Hamiltonian obtained from the p-d mixing model. The effective spin-spin interaction induces a tail structure at the top of the occupied p-band and a new narrow band develops with hole doping at the Fermi level, splitting from the main p-band. The obtained effective Hamiltonian seems to describe the change of electronic states even in insulator-metal transition region.

Original languageEnglish
Pages (from-to)1005-1006
Number of pages2
JournalPhysica B: Condensed Matter
Publication statusPublished - 1990 Jan 1

ASJC Scopus subject areas

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


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