Quantum size effects in metal thin films grown on quasicrystalline substrates.
Quantum size effects in metal thin films grown on quasicrystalline substrates.
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DOI：
10.1103/physrevlett.95.155504
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发表时间：
2005-10
影响因子：
8.6
通讯作者：
V. Fournée;H. Sharma;M. Shimoda;A. Tsai;B. Unal;A. R. Ross;T. Lograsso;P. Thiel
中科院分区：
文献类型：
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作者：
V. Fournée;H. Sharma;M. Shimoda;A. Tsai;B. Unal;A. R. Ross;T. Lograsso;P. Thiel
我们分别通过扫描隧道显微镜研究了Bi和Ag薄膜在Al₆₃Cu₂₄Fe₁₃和Al₇₂Pd₁₉.₅Mn₈.₅准晶的五重表面上的生长情况。对于这两个体系，我们都观察到了具有神奇高度的岛状物的形成，其对应于特定数量原子层的堆叠。我们根据量子尺寸效应来解释这种不寻常的生长形态，这种量子尺寸效应是由电子在薄膜内的受限所产生的。因此，神奇的岛状物高度是准晶衬底电子结构的一种直接体现。
We have investigated by scanning tunneling microscopy the growth of Bi and Ag thin films on the fivefold surface of Al63Cu24Fe13 and Al72Pd19.5Mn8.5 quasicrystal, respectively. For both systems, we observe the formation of islands with magic height, corresponding to the stacking of a specific number of atomic layers. We interpret this unusual growth morphology in terms of quantum size effects, arising from the confinement of the electron within the film. The magic island heights are thus a direct manifestation of the electronic structure of the quasicrystalline substrates.