Magnetic impurity in the quasicrystals and search for new physical properties

准晶体是一种具有良好有序但空间非周期原子结构的新型固体，其物理性质一直是研究人员关注的热点。近似物是一种晶体材料，它具有与准晶体非常相似的局部原子团簇，但具有空间周期性，因此了解其物理性质对于揭示准晶体的内在差异非常重要。在本工作中，我们研究了准晶体中的磁性杂质效应，系统地研究了近似物的磁性，并探索了相关晶体材料的新物理性质。结果发现，磁性杂质与致密磁性准晶体具有非常相似的自旋相关性，并且磁性近似也显示出与准晶体几乎相同的自旋相关性。结果表明，自旋相关是由准晶体和近似晶体中的局域原子团簇以及局域电子结构决定的。我们还在相关晶体材料中发现了一些有趣的特性。

Quasicrystal is a new form of solid that has a well-ordered but spatially aperiodic atomic structure, and therefore its physical property is of significant interest among researchers. An approximant is a crystalline material that has a local atomic cluster very similar to the quasicrystal, nevertheless, has spatial periodicity, and hence understanding its physics property is important to reveal intrinsic difference to the quasicrystals. In this work, we have investigated magnetic-impurity effect in the quasicrystals, systematically studied the magnetic properties of approximants, and also explored for new physical properties in related crystalline materials. As a result, we found that the magnetic impurity has very similar inter-spin correlations as those found in the dense magnetic quasicrystal, and that the magnetic approximant also shows almost identical spin correlations to those in the quasicrystals. The result suggests that the spin correlations are determined by the local atomic cluster both in the quasicrystal and approximants, as well as by its local electronic structure. We also found several interesting properties in related crystalline materials.