Arguments for a lone-pair model for high temperature superconductivity

Istva´n Po´csik, Endel Lippmaa

Research output: Contribution to journalArticle


Structure determination of copper-oxygen planes in high temperture oxide superconductor materials by neutron scattering have shown that the Cu-O-Cu bond angles strongly deviate from 180°. This is explainable by the Cu-O bond having a strong covalent character that allows the valence-alternating pair behaviour of copper neighbours. In this case a pair of electrons — the lone pair of oxygen — oscillates between the copper ions. This mechanism allows lone pairs to mediate supercurrent like Cooper pairs. An interesting consequence of this valence alternating pair behaviour is quasi-ferroelectricity, which has an important contribution to the conducting mechanism of the supercurrent.

Original languageEnglish
Pages (from-to)1195-1196
Number of pages2
JournalPhysica C: Superconductivity and its applications
Publication statusPublished - Jan 1 1988


ASJC Scopus subject areas

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

Cite this