Electronically driven instabilities and superconductivity in the layered La2-xBaxCuO4 perovskites

Jaejun Yu*, Arthur J Freeman, J. H. Xu

*Corresponding author for this work

Research output: Contribution to journalArticle

513 Scopus citations

Abstract

Body-centered tetragonal La2CuO4 is shown to have its electronic structure and properties dominated by the layered in-plane Cu-3dO-2p interactions. A strong Fermi surface instability along [110] with q=2kF leads, via a soft-phonon mode, to the observed orthorhombic phase and accounts for its semiconducting properties. The addition of divalent metals, i.e., Ba, Sr, suppresses the instability and stabilizes the tetragonal phase where the same soft-phonon branch apparently contributes to a large electron-phonon interaction and a high Tc.

Original languageEnglish (US)
Pages (from-to)1035-1037
Number of pages3
JournalPhysical review letters
Volume58
Issue number10
DOIs
StatePublished - Jan 1 1987

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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