Pseudogap structure in icosahedral ZnMgY and ZnMgHo quasicrystals
2003 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 212, 485-490 p.Article in journal (Refereed) Published
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.
quasicrystals, pseudogap, photoemission spectroscopy, energy
IdentifiersURN: urn:nbn:se:kth:diva-22645ISI: 000183967200089OAI: oai:DiVA.org:kth-22645DiVA: diva2:341343
QC 201005252010-08-102010-08-10Bibliographically approved