Development of the electronic structure in a K-doped C-60 monolayer on a Ag(1 1 1) surface

L.H Tjeng, R. Hesper, A.C L Heessels, A. Heeres, H.T. Jonkman, G.A Sawatzky

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    Abstract

    We present an electron spectroscopy study of the development of the electronic structure in the K-doped C-60 monolayer on a Ag(1 1 1) surface. We find that the occupation of the lowest unoccupied molecular orbital (LUMO) of the C-60 can be varied continuously from 0.75 (undoped) to 6.0 (fully doped). We also find that the density of states at the Fermi level for a doping level corresponding to 3 electrons per C-60 is at least a factor of two higher than that found from photoemission on bulk K3C60. This enhanced density of states at the Fermi level might suggest an increased superconducting transition temperature for the monolayer system. (C) 1997 Elsevier Science Ltd.

    Original languageEnglish
    Pages (from-to)31-35
    Number of pages5
    JournalSolid State Communications
    Volume103
    Issue number1
    DOIs
    Publication statusPublished - Jul-1997

    Keywords

    • fullerenes
    • surfaces and interfaces
    • photoelectron spectroscopies
    • RAY-ABSORPTION-SPECTROSCOPY
    • METAL-SURFACES
    • PHOTOEMISSION SPECTRA
    • POTASSIUM FULLERIDES
    • CHARGE-TRANSFER
    • FERMI-LEVEL
    • SOLID C-60
    • BAND-GAP
    • STATES
    • GROWTH

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