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• W1964327025 endingPage "204" @default.
• W1964327025 startingPage "199" @default.
• W1964327025 abstract "The Cu K-edge shifts to lower energy and the pre-edge weakens with greater substitution x in LaCuOSe 1– x Te x , confirming a diminished Cu-to- Ch electron transfer within [Cu Ch ] layers. ► Shifts in O 1s BEs are influenced by competing effects in charges of neighbouring La and more distant Ch atoms, according to charge potential model. ► Changes in Cu K- and Se K-edge spectra are related to Cu-to- Ch charge transfer within [Cu Ch ] layers. ► Previously believed to be insignificant, La– Ch interactions between [LaO] and [Cu Ch ] layers are confirmed. The complete oxychalcogenide solid solution LaCuOSe 1− x Te x (0 ≤ x ≤ 1) was examined by X-ray photoelectron and X-ray absorption near-edge spectroscopy. Whereas the La 3d, Cu 2p and most of the chalcogen ( Ch ) core-line peaks are invariant, the O 1s binding energies (BE) show shifts (up to 0.35 eV) with increasing substitution of Se by Te that reflect the competing effects of the charges of neighbouring La atoms and more distant Ch atoms, if the charge potential model is applied. This observation supports the occurrence of interlayer La– Ch interactions between the [LaO] and [Cu Ch ] layers in LaCuO Ch . The Se 3d BEs show smaller shifts (up to 0.15 eV) that indicate the development of more negative charge on the Se atoms with increasing x . The Cu K-edge and Se K-edge spectra reveal subtle absorption edge energy and intensity changes that can be explained by the evolution of Cu-to- Ch charge transfer within the [Cu Ch ] layers." @default.
• W1964327025 created "2016-06-24" @default.
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• W1964327025 creator A5046464074 @default.
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• W1964327025 date "2012-02-01" @default.
• W1964327025 modified "2023-10-16" @default.
• W1964327025 title "X-ray photoelectron and absorption spectroscopy of mixed lanthanum copper oxychalcogenides LaCuOSe1−xTex (0≤x≤1)" @default.
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• W1964327025 doi "https://doi.org/10.1016/j.jallcom.2011.11.063" @default.
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