Evaluation of bonding nature in Al-based quasicrystals by positron annihilation spectroscopy

我们的主要目标是建立一种用正电子湮没光谱评价铝基准晶体成键性质的方法。铝基准晶体具有接近费米能级的赝隙，是新型热电材料的新候选材料。我们观察到各种al基准晶体和相关材料的正电子湮灭率与电导率之间有明显的相关性。这种相关性可以用来讨论铝基量子晶体在二十面体簇中的成键性质。建立一种评估铝基qc键合性质的方法对于未来材料的设计是必要的，例如热电材料。

Our main goal is to establish a method of evaluation of bonding-nature in Al-based quasicrystals by positron annihilation spectroscopy. Al-based quasicrystals, which possess the pseudogap near the Fermi level, are novel candidates for new thermoelectric materials.We observed the clear correlation between the positron annihilation rate and electrical conductivity in various Al-based quasicrystals and related materials. The present correlation can be used to discuss the bonding nature in icosahedral clusters of the Al-based QCs. Establishing a method of evaluating the bonding nature of the Al-based QCs is necessary for future designs of material, such as thermoelectric materials.