- Tytuł:
- Photoemission and Optical Spectroscopy of i-ZnMgEr Quasicrystal
- Autorzy:
-
Suchodolskis, A.
Assmus, W.
Babonas, G.-J.
Giovanelli, L.
Karlsson, U. O.
Karpus, V.
Le Lay, G.
Rėza, A.
Uhrig, E. - Powiązania:
- https://bibliotekanauki.pl/articles/2041813.pdf
- Data publikacji:
- 2005-02
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 71.23.Ft
- Opis:
- The results of photoemission and optical studies of icosahedral single-grain ZnMgEr quasicrystals are presented. Synchrotron radiation photoemission measurements were performed on in situ cleaved samples at 10$\text{}^{-10}$ mbar pressure and low, 140-150 K temperature. The valence band photoemission spectra measured reveal a simple metal-type valence band of icosahedral ZnMgEr with a distinct Fermi edge cut-off and with a sharp pseudogap feature. The photoemission spectra of shallow Mg 2p and Zn 3d core levels indicate a coordination shift of Mg 2p spin-orbit doublet and an oscillating dependence of Zn 3d photoemission line components on the photon energy within the hν=20-160 eV range investigated. The optical response of icosahedral ZnMgEr, a dispersion of the dielectric function, was measured by the spectroscopic ellipsometry technique in the 0.5-5.0 eV spectral range. The optical spectra of the quasicrystal indicate the Drude-type optical response superimposed with a peak of interband optical transitions. The interband optical transitions can be modelled with the pseudogap parameters which agree with those deduced in an analysis of the photoemission valence band spectra.
- Źródło:
-
Acta Physica Polonica A; 2005, 107, 2; 412-419
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł