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Study of the electronic structure of the Al-Cu-Fe quasicrystalline system

机译：Al-Cu-Fe准晶体系的电子结构研究

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摘要

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 omega-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.
机译：已对属于Al-Cu-Fe系统的化学成分相同的准晶体样品和ω相样品的清洁表面，在反射几何结构中测量了光电子光谱，光子吸收光谱和电子能量损失光谱。进行的研究使得揭示准晶体电子结构的某些特定特征成为可能。这些特征可以成功地用于构建准晶体材料的实际电子结构模型。已在与Fe2p和Cu2p吸收边缘相对应的光子能量范围内测量了共振光电子能谱。在Fe2p边缘附近的价带中发现光谱强度急剧增加（增加了3-4倍）。在Cu2p边缘附近，俄歇电子发射共振增加，而价带发射几乎不变。

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