Calculated local density X-ray and photoemission spectra for superconducting La2-xMxCuO4: Localization of Cu-3d

J. Redinger, Jaejun Yu, Arthur J Freeman, P. Weinberger

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Abstract

Comparison of UPS (XPS) and XES spectra for the high Tc superconductor La2-xMxCuO4 - calculated using highly precise local density results - with available experimental data reveals a large shift of about 2 eV to lower energies for the Cu-d related features. This shift is interpreted qualitatively in terms of a simple two-level model taking into account the hole-hole repulsion at the Cu sites in the photoemission final state. This simple model explains nicely the magnitude of the shift, the occurence of a Cu related satellite below the valence-bands, and the charge-transfer screening of the Cu-d photo-holes by O-p electrons. The O-states, especially the bonding states at the bottom of the valence band, are less affected and agree reasonably well with the experimental findings.

Original languageEnglish
Pages (from-to)463-468
Number of pages6
JournalPhysics Letters A
Volume124
Issue number8
DOIs
Publication statusPublished - Oct 12 1987

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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