Pseudo-Gap In Quasicrystals: A Key to Understand Their Stability and Properties.
Pseudo-Gap In Quasicrystals: A Key to Understand Their Stability and Properties.
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准晶体中的赝间隙：了解其稳定性和性质的关键。
DOI：
10.2320/matertrans.42.911
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
J. Dubois
中科院分区：
文献类型：
--
作者：
E. Belin;V. Fournée;J. Dubois
迄今为止已知的大多数稳定准晶体都是基于铝的。事实证明，这种准晶体中以及表现出类似二十面体短程有序的晶体中铝原子的价带在费米能位置处显示出明显的赝能隙。在本文中，我们描述了如何使用光谱技术发现和量化准晶体的这一特定特征。然后我们表明，持续到表面的赝能隙在这些非常规材料的热力学稳定性中起着重要作用，并且涉及非周期性金属间化合物的传输特性以及表面特性。
The majority of stable quasicrystals known so far is based upon aluminum. It turns out that the valence band of aluminum atoms in such quasicrystals, as well as in the crystals that exhibit a similar icosahedral short range order, shows a pronounced pseudo-gap located at the position of the Fermi energy. In the present paper, we describe how this specific feature of quasicrystals is uncovered and quantified using spectroscopy techniques. We show then that the pseudo-gap, which persists up to the surface, plays an important role in the thermodynamic stability of these non-conventional materials and is involved in transport properties as well as in surface properties of aperiodic intermetallics.