Comparative soft-x-ray resonant-photoemission study on Bi2Sr2CaCu2O8, CuO, and Cu2O

L. H. Tjeng, C. T. Chen, S. W. Cheong

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Abstract

Strong O 1s and Cu 2p resonant enhancements are observed in the valence-band photoemission spectra of Bi2Sr2CaCu2O8, CuO, and Cu2O. The results can be accounted for by a model Hamiltonian with similar parameters but different band filling. The O 1s (Cu 2p) resonant enhancements are found to be dominated by local O 2p4 (Cu 3d8) final states reached via local intra-atomic processes; interatomic O-to-Cu resonance processes are found to play only a minor role. It is demonstrated that enhancements observed at 01.5 eV binding energies in angle-resolved photoemission of Bi2Sr2CaCu2O8 with the photon energy tuned at 18 eV cannot be attributed to an O 2s resonance effect.

Original languageEnglish (US)
Pages (from-to)8205-8208
Number of pages4
JournalPhysical Review B
Volume45
Issue number14
DOIs
StatePublished - 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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