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Chemical localization

机译:化学定位

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摘要

The possibility that, in spite of high valence electron concentrations, metal-insulator transitions can in principle occur in materials composed of atoms of only metallic elements is demonstrated based on the analysis of experimental data. For such a transition to occur, stable atomic configurations forming deep potential wells capable of trapping dozens of valence electrons should appear in the system. This means, in essence, that bulk metallic medium transforms into an assembly of identical quantum dots. Depending on the parameters, such a material either does contain delocalized electrons (metal) or does not contain such electrons (insulator). The degree of disorder is one of these parameters. Two types of substances with such properties are discussed: liquid binary alloys with both components being metallic, and thermodynamically stable quasicrystals.
机译:根据实验数据的分析,证明了尽管价电子浓度很高,但原则上在仅由金属元素组成的材料中仍可能发生金属-绝缘体跃迁的可能性。为了发生这种过渡,系统中应出现稳定的原子构型,形成能捕获数十个价电子的深势阱。从本质上讲,这意味着大块金属介质会转变为相同量子点的集合。取决于参数,这种材料要么包含离域电子(金属),要么不包含电子(绝缘体)。无序度是这些参数之一。讨论了具有这种性质的两种物质:两种成分均为金属的液态二元合金和热力学稳定的准晶体。

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