This paper shows that in copper oxide based compounds where Cu ions are in a square planar geometry with four coordination oxygen ions, i.e. CuO and Nd2CuO4, the Cu2p 3 2 (3d)10L) X-ray photoelectron core lines are narrower than in similar compounds with Cu ions in a pyramidal or octahedral geometry with five or six neighboring oxygens, i.e. Bi2Sr2CaCu2O8 and La2CuO4. To explain this difference two different charge transfer mechanisms from the oxygen p orbitals to the Cu3d orbitals are proposed. For square planar geometry (CuO4) only the px,y → dxjavax.xml.bind.JAXBElement@337bf26c - yjavax.xml.bind.JAXBElement@4aae6dcb charge transfer is allowed, whereas for octahedral or pyramidal geometry the additional pz → dzjavax.xml.bind.JAXBElement@48ef4e23 transition could take place. These two different final state configurations will produce different ionization potentials for the Cu2p 3 2 core levels. © 1992.
The fine structure of the Cu2p 3 2 X-ray photoelectron spectra of copper oxide based compounds / Parmigiani, F.; Depero, L. E.; Minerva, T.; Torrance, J. B.. - In: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA. - ISSN 0368-2048. - 58:4(1992), pp. 315-323. [10.1016/0368-2048(92)85017-2]
The fine structure of the Cu2p 3 2 X-ray photoelectron spectra of copper oxide based compounds
Parmigiani F.;Minerva T.;
1992
Abstract
This paper shows that in copper oxide based compounds where Cu ions are in a square planar geometry with four coordination oxygen ions, i.e. CuO and Nd2CuO4, the Cu2p 3 2 (3d)10L) X-ray photoelectron core lines are narrower than in similar compounds with Cu ions in a pyramidal or octahedral geometry with five or six neighboring oxygens, i.e. Bi2Sr2CaCu2O8 and La2CuO4. To explain this difference two different charge transfer mechanisms from the oxygen p orbitals to the Cu3d orbitals are proposed. For square planar geometry (CuO4) only the px,y → dxjavax.xml.bind.JAXBElement@337bf26c - yjavax.xml.bind.JAXBElement@4aae6dcb charge transfer is allowed, whereas for octahedral or pyramidal geometry the additional pz → dzjavax.xml.bind.JAXBElement@48ef4e23 transition could take place. These two different final state configurations will produce different ionization potentials for the Cu2p 3 2 core levels. © 1992.File | Dimensione | Formato | |
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