Study of the electronic structure of the Al-Cu-Fe quasicrystalline system |
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| Authors: | V G Nazin M N Mikheeva L L Lev V A Rogalev A M Bryazkalo D S Shaĭtura E V Chikina S L Molodtsov M V Poigin |
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| Institution: | (1) Russian Research Centre Kurchatov Institute, pl. Akademika Kurchatova 1, Moscow, 123182, Russia;(2) Institute of Solid-State Physics, Dresden Technical University, Dresden, Germany;(3) Institute of Experimental Physics, Berlin Free University, Berlin, Germany |
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| Abstract: | The photoelectron spectra, photon absorption spectra, and electron energy loss spectra have been measured in reflection geometry for the clean surface of quasicrystalline samples and ω-phase samples of identical chemical composition that belong to the Al-Cu-Fe system. The investigations performed made it possible to reveal some specific features of the electronic structure of quasicrystals; these features can be successfully used in construction of the model of the actual electronic structure of quasicrystalline materials. The resonant photoelectron spectra have been measured in the range of photon energies corresponding to the Fe2p and Cu2p absorption edges. A sharp increase (by a factor of 3–4) in the spectral intensity is found in the valence band near the Fe2p edge. Near the Cu2p edge, the Auger electron emission resonantly increased, while the emission from the valence band almost did not change. |
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