Electronic states of core levels and valence bands for KxC60 studied by X-ray photoelectron spectroscopy

Y. Fukuda, N. Sanada, M. Nagoshi, T. Takahashi, H. Katayama-Yoshida, K. Kikuchi, S. Suzuki, I. Ikemoto, Y. Achiba, Y. Syono, M. Tachiki

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8 Citations (Scopus)


Electronic states of K 2p and C 1s core levels and valence bands for KχC60 (χ=0≈6.3) have been studied by X-ray photoelectron spectroscopy (XPS). We find two different chemical states of potassium with binding energy 293.8 and 294.9 eV. The K 2p 3 2 line becomes a single peak at χ = 6.3. These results are discussed in terms of the sites occupied by K in KχC60. The C 1s line (285.1 eV) for C60 is shifted by 0.3 eV to the side of higher binding energy by a very small amount of K, which is consistent with the shift of the valence band. The other line at 284.4 eV appears at 10 min evaporation (χ = 0.8). The intensity of the former is reduced and that of the latter increases with the evaporation time.

Original languageEnglish
Pages (from-to)320-324
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue number4-6
Publication statusPublished - 1991 Oct 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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