标题： 准周期自由电子金属层 显示英文标题

标题： Quasiperiodic free electron metal layers

摘要： 使用电子衍射，我们表明自由电子金属如钠和钾在二十面体Al-Pd-Mn的五重表面上形成高度规则的准周期单层，并且准周期性可传播到钠的第二层。我们的光电子能谱结果表明，准晶体碱金属吸附层在费米能级附近不表现出赝隙，这被认为是准晶体材料电子结构的特征。基于密度泛函理论的计算为准晶体碱金属单层提供了模型结构，并确认了赝隙的不存在。 显示英文摘要

摘要： Using electron diffraction, we show that free electron metals such as sodium and potassium form a highly regular quasiperiodic monolayer on the fivefold surface of icosahedral Al-Pd-Mn and that the quasiperiodicity propagates up to the second layer in sodium. Our photoelectron spectroscopy results show that the quasicrystalline alkali metal adlayer does not exhibit a pseudogap near the Fermi level, thought to be charactersitic for the electronic structure of quasicrystalline materials. Calculations based on density functional theory provide a model structure for the quasicrystalline alkali metal monolayer and confirm the absence of a pseudogap.