Valence fluctuations in La2-xSrxCuO4

R. A. de Groot*, H. Gutfreund, M. Weger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Ab-initio electronic band structure calculations are presented for the perovskite La2CuO4 and for this material doped with Sr for a supercell of composition La3SrCu2O8. This material is close to the high Tc superconductor La2-xSrxCuO4 discovered recently. The Sr doping gives rise to strong valence fluctuations. We discuss the effect of the valence fluctuations on the stability of the lattice, indicating a small value of U and enhancing the electron-phonon coupling λ, mainly by a mechanism of incipient peroxide formation.

Original languageEnglish
Pages (from-to)451-456
Number of pages6
JournalSolid State Communications
Volume63
Issue number6
DOIs
StatePublished - Aug 1987

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