Abstract
The electronic structure of K-doped C60 was investigated by photoemission (PE) and X-ray absorption near-edge structure (XANES) studies at the C-1s and K-2p thresholds. In addition, information on the local K-derived partial density of states in superconducting K3C60 was obtained by resonant PE at the K-2p 1/2 threshold. The experimental observations support a complete charge transfer from K to C60 and we clearly observe a finite density of states atE F . From resonant PE, occupied states with K-p, d character could be identified in the binding-energy region from 1.5 to 8 eV below, but not directly at the Fermi level. This partial-density-of-states structure agrees well with the results of our band-structure calculations based on the local-density approximation.
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Molodtsov, S.L., Gutiérrez, A., Navas, E. et al. Resonant photoemission study ofK-derived valence-band states in K X C60 . Z. Physik B - Condensed Matter 92, 347–351 (1993). https://doi.org/10.1007/BF01308753
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DOI: https://doi.org/10.1007/BF01308753