Abstract
The surface of a single grain icosahedral (i) Al-Cu-Fe quasicrystalline sample is studied as a function of annealing temperature using ultra-violet photoemission spectroscopy (UPS). Reflection high-energy electron diffraction and X-ray photoelectron spectroscopy are also performed to verify surface structure and composition. The sputtered surface shows structure and chemical composition consistent with that of β-Al-Cu-Fe cubic phase together with a sharp Fermi cut-off. With increasing annealing temperature, the surface structure and composition reverts to that of the quasicrystal. This transformation is correlated with a decrease of the spectral intensity at the Fermi level (EF). Analysis of the UPS spectra in the region near EF is performed by fitting the data with a pseudogap function.
Original language | English |
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Pages (from-to) | 54-62 |
Number of pages | 9 |
Journal | Surface Science |
Volume | 539 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 2003 Aug 1 |
Externally published | Yes |
Keywords
- Ion etching
- Reflection high-energy electron diffraction (RHEED)
- Sputtering
- Surface relaxation and reconstruction
- Visible and ultraviolet photoelectron spectroscopy
- X-ray photoelectron spectroscopy
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry