Title

Resonant excitation of an oxygen valence satellite in photoemission from high-Tc superconductors

Document Type

Article

Publication Date

1-1-1989

Abstract

A detailed analysis of the intensities of valence-band photoelectron features of superconducting YBa2Cu3O7-x and semiconducting La1.85Sr0.05CuO4 has revealed a resonance in the peak located at a binding energy of 9.5 eV for photon energies spanning the onset of O 2s excitations. This demonstrates conclusively that the feature is associated with oxygen excitations. The origin of the satellite is described and its disappearance on superconducting surfaces is explained. © 1989 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review B

First Page

4768

Last Page

4771

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