Group theoretical identification of active localized orbital space in high Tc cuprate superconductors

Lawrence J. Dunne, Erkki J. Brändas, John N. Murrell, Veaceslav Coropceanu

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

There is a widely shared consensus that the pair condensate wavefunction in cuprate superconductors has a dominant dx2 - y2 symmetry. In this paper a group theoretical analysis of the pair condensate wavefunction in real space for cuprate superconductors is presented. The analysis indicates that there is a degenerate pair of active bands in cuprate superconductors which are principally derived from localized e-orbitals and two possible singlet pair states formed from two different orbitals with symmetries a1, b1 or a2, b2 and all three may contribute to the condensate wavefunction. Hund's rule and the experimental observation that singlet pairing with a short coherence length occurs in cuprate superconductors, indicates that the first option is the most likely candidate in these materials and that hole doping mainly occurs from 1B1 pairs of e-orbitals giving rise to singlet electron pairing and the phenomenon of high Tc cuprate superconductivity.

Original languageEnglish (US)
Pages (from-to)619-623
Number of pages5
JournalSolid State Communications
Volume108
Issue number9
DOIs
StatePublished - Nov 3 1998
Externally publishedYes

ASJC Scopus subject areas

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

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