Spin-polaron pairing and high-temperature superconductivity

Hiroshi Kamimura, Shunichi Matsuno, Riichiro Saito

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

We show that in superconducting materials with CuO2 layers spin-polarons associated with itinerant holes in the ev band (Cu dz2 - Opπ band,) are created by strong intra-atomic exchange interaction (Hund's coupling) with localized dx2-y2 holes. Then the interplay of Hund's coupling and superexchange between Cu2+(dx2-y2) spins gives rise to an attractive exchange interaction between spin-polarons, which leads to the formation of spin-singlet spin-polarons pairs. This contributes to high temperature superconductivity. By solving an gap equation it is shown that the s-wave pairing reproduces the observed x dependence of Tc as well as the right magnitudes of Tc in (La1-xSrx)2CuO4 satisfactorily.

Original languageEnglish
Pages (from-to)363-367
Number of pages5
JournalSolid State Communications
Volume67
Issue number4
DOIs
Publication statusPublished - 1988 Jul
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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