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Pseudogap structure in icosahedral ZnMgY and ZnMgHo quasicrystals
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2003 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 212, 485-490 p.Article in journal (Refereed) Published
Abstract [en]

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 approximate to90 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 th approximate to50% (of the normal DOS) depth and the approximate to0.8 eV width. The values of i-ZnMg(Y, Ho) pseudogap parameters are comparable with those of other quasicrystals.

Place, publisher, year, edition, pages
2003. Vol. 212, 485-490 p.
Keyword [en]
quasicrystals, pseudogap, photoemission spectroscopy, energy
Identifiers
URN: urn:nbn:se:kth:diva-22645ISI: 000183967200089OAI: oai:DiVA.org:kth-22645DiVA: diva2:341343
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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Karlsson, Ulf O.

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Göthelid, MatsKarlsson, Ulf O.
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