O-2p holes in tetravalent oxides of Ce and Pr and the Fehrenbacher-Rice hybrid in PrBa2Cu3O7-δ

Z. Hu; R. Meier; C. Schüßler-Langeheine; E. Weschke; G. Kaindl; I. Felner; M. Merz; N. Nücker; S. Schuppler; A. Erb

doi:10.1103/PhysRevB.60.1460

O-2p holes in tetravalent oxides of Ce and Pr and the Fehrenbacher-Rice hybrid in PrBa₂Cu₃O_7-δ

Z. Hu
, R. Meier
, C. Schüßler-Langeheine
, E. Weschke
, G. Kaindl
, I. Felner
, M. Merz
, N. Nücker
, S. Schuppler
, A. Erb

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

We report on an x-ray absorption near-edge structure (XANES) study of O-2p holes induced by Ln-4f/O-2p covalence in LnO₂ (Ln=Ce, Pr) and BaLnO3 (Ln=Ce, Pr, Tb). The pre-edge peak in the O-1s XANES spectra, associated with O-2p holes, shifts to lower energy from Ce to Pr, in agreement with theoretical expectation, and its intensity scales with the strength of the 4f/2p covalence. In Pr(IV) oxides, the pre-edge peak is at the energy of the “Fehrenbacher-Rice” state in PrBa₂Cu₃O_7-δ, supporting the view that the suppression of superconductivity in PrBa₂Cu₃O_7-δ is due to Pr-4f/O-2p hybridization.

Original language	English
Pages (from-to)	1460-1463
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	60
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevB.60.1460
State	Published - 1999

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title = "O-2p holes in tetravalent oxides of Ce and Pr and the Fehrenbacher-Rice hybrid in PrBa2Cu3O7-δ",

abstract = "We report on an x-ray absorption near-edge structure (XANES) study of O-2p holes induced by Ln-4f/O-2p covalence in LnO2 (Ln=Ce, Pr) and BaLnO3 (Ln=Ce, Pr, Tb). The pre-edge peak in the O-1s XANES spectra, associated with O-2p holes, shifts to lower energy from Ce to Pr, in agreement with theoretical expectation, and its intensity scales with the strength of the 4f/2p covalence. In Pr(IV) oxides, the pre-edge peak is at the energy of the “Fehrenbacher-Rice” state in PrBa2Cu3O7-δ, supporting the view that the suppression of superconductivity in PrBa2Cu3O7-δ is due to Pr-4f/O-2p hybridization.",

author = "Z. Hu and R. Meier and C. Sch{\"u}{\ss}ler-Langeheine and E. Weschke and G. Kaindl and I. Felner and M. Merz and N. N{\"u}cker and S. Schuppler and A. Erb",

year = "1999",

doi = "10.1103/PhysRevB.60.1460",

language = "אנגלית",

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T1 - O-2p holes in tetravalent oxides of Ce and Pr and the Fehrenbacher-Rice hybrid in PrBa2Cu3O7-δ

AU - Hu, Z.

AU - Meier, R.

AU - Schüßler-Langeheine, C.

AU - Weschke, E.

AU - Kaindl, G.

AU - Felner, I.

AU - Merz, M.

AU - Nücker, N.

AU - Schuppler, S.

AU - Erb, A.

PY - 1999

Y1 - 1999

N2 - We report on an x-ray absorption near-edge structure (XANES) study of O-2p holes induced by Ln-4f/O-2p covalence in LnO2 (Ln=Ce, Pr) and BaLnO3 (Ln=Ce, Pr, Tb). The pre-edge peak in the O-1s XANES spectra, associated with O-2p holes, shifts to lower energy from Ce to Pr, in agreement with theoretical expectation, and its intensity scales with the strength of the 4f/2p covalence. In Pr(IV) oxides, the pre-edge peak is at the energy of the “Fehrenbacher-Rice” state in PrBa2Cu3O7-δ, supporting the view that the suppression of superconductivity in PrBa2Cu3O7-δ is due to Pr-4f/O-2p hybridization.

AB - We report on an x-ray absorption near-edge structure (XANES) study of O-2p holes induced by Ln-4f/O-2p covalence in LnO2 (Ln=Ce, Pr) and BaLnO3 (Ln=Ce, Pr, Tb). The pre-edge peak in the O-1s XANES spectra, associated with O-2p holes, shifts to lower energy from Ce to Pr, in agreement with theoretical expectation, and its intensity scales with the strength of the 4f/2p covalence. In Pr(IV) oxides, the pre-edge peak is at the energy of the “Fehrenbacher-Rice” state in PrBa2Cu3O7-δ, supporting the view that the suppression of superconductivity in PrBa2Cu3O7-δ is due to Pr-4f/O-2p hybridization.

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JO - Physical Review B - Condensed Matter and Materials Physics

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IS - 3

ER -

O-2p holes in tetravalent oxides of Ce and Pr and the Fehrenbacher-Rice hybrid in PrBa₂Cu₃O_7-δ

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