Title: Pseudogap structure in icosahedral ZnMgY and ZnMgHo quasicrystals
Abstract: The results of a photoemission study of icosahedral single-grain ZnMg(Y, Ho) quasicrystals and their crystalline approximant Zn2Mg are presented. Synchrotron radiation photoemission measurements have been performed on in situ cleaved samples at low temperature of ≈90 K and 10−10 mbar pressure. The spectra obtained indicate simple metal-type valence bands (VB) with distinct Fermi edge cutoff. Analysis of the Fermi edge spectra reveals the presence of a pseudogap in i-ZnMg(Y, Ho) quasicrystals. The pseudogap corresponds to a rather sharp DOS dip at the Fermi level with the ≈50% (of the normal DOS) depth and the ≈0.8 eV width. The values of i-ZnMg(Y, Ho) pseudogap parameters are comparable with those of other quasicrystals.
Publication Year: 2003
Publication Date: 2003-03-04
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 9
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