TY - JOUR
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.
UR - https://www.scopus.com/pages/publications/0000283798
U2 - 10.1103/PhysRevB.60.1460
DO - 10.1103/PhysRevB.60.1460
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AN - SCOPUS:0000283798
SN - 1098-0121
VL - 60
SP - 1460
EP - 1463
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 3
ER -