Abstract
The conduction band of various stages of alkali graphite intercalation compounds has been studied by low energy photoelectron spectroscopy ( hv ⩽ 6.55 eV). The dissimilar behaviour of the width β of the conduction band peak as a function of photon energy for C 6Li and C 8 M ( M = K, Rb, and Cs) is discussed in terms of different band types in the vicinity of the Fermi level. The stage dependence of β is measured and interpreted for the system C x K (for stages 1, 2, 4, and 5).
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