Abstract
We report experimental results concerning electronic valence band distributions of different AlCuFe, AlMnPd, AlCuMn and AlCuLi quasicrystals which have been probed by means of the soft X-ray emission spectroscopy technique. Adjustment of the partial distributions in the binding energy scale allows to investigate the various electronic interactions. We find evidence of hybridization effects between Al sp states and Fe(Mn)d states near the Fermi level and with Cu(Pd) states in the middle of the band. The AlspCu(Pd)d interaction splits the Al s and p bands into two separated parts while the AlspFe(Mn)d interaction repels the Al valence band edge from the Fermi level. It follows that the density of Alsp states at the Fermi level is very low and that a pseudo-gap is present.
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