Valence fluctuations in La2-xSrxCuO4

R. A. de Groot; H. Gutfreund; M. Weger

doi:10.1016/0038-1098(87)90269-9

Valence fluctuations in La_2-xSr_xCuO₄

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

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-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 La_2-xSr_xCuO₄ 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 language	English
Pages (from-to)	451-456
Number of pages	6
Journal	Solid State Communications
Volume	63
Issue number	6
DOIs	https://doi.org/10.1016/0038-1098(87)90269-9
State	Published - Aug 1987

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title = "Valence fluctuations in La2-xSrxCuO4 ",

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.",

author = "\{de Groot\}, \{R. A.\} and H. Gutfreund and M. Weger",

year = "1987",

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doi = "10.1016/0038-1098(87)90269-9",

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T1 - Valence fluctuations in La2-xSrxCuO4

AU - de Groot, R. A.

AU - Gutfreund, H.

AU - Weger, M.

PY - 1987/8

Y1 - 1987/8

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0023398619

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VL - 63

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JO - Solid State Communications

JF - Solid State Communications

IS - 6

ER -

Valence fluctuations in La_2-xSr_xCuO₄

Abstract

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