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- W2003407656 abstract "The effects of Ce substitution and reduction on the core levels and valence electronic states of ${mathrm{Nd}}_{2mathrm{ensuremath{-}}mathit{x}}$${mathrm{Ce}}_{mathit{x}}$${mathrm{CuO}}_{4mathrm{ensuremath{-}}mathit{y}}$ have been investigated using x-ray photoelectron spectroscopy (XPS). It is found that the surfaces could be tremendously degraded by scraping, leading to changes in the electronic structures of Cu, O, and the Fermi edge. The changes in the Cu 2p spectra imply that the Ce substitution and the reduction donate electrons to Cu sites to show the appearance of monovalent Cu. The fraction of monovalent Cu derived from the Cu 2p spectra is less than the amount of Ce, which suggests that Ce is in the mixed-valence state. The XPS valence spectra show the Fermi edge formed by the electrons injected into the electronic state with the Cu 3${mathit{d}}^{10}$ configuration. The nature of the Fermi edge is discussed in terms of photoionization cross section." @default.
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- W2003407656 title "Effects of Ce substitution and and reduction on the electronic states of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Nd</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi …" @default.
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- W2003407656 doi "https://doi.org/10.1103/physrevb.42.4263" @default.
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