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摘要
We show that two confinement modes exist for electronic states localized on a nanostructured surface. Image potential states confined on Ar islands on Cu(100) and on vacancy islands on 1 ML Ar/Cu(100) surface are studied. Whereas the Ar islands lead to the expected "particle-in-a-box" quantization, the vacancy islands are shown to exhibit a very different behavior, characterized by a much lower quantization energy. The two situations correspond to the confinement of two-dimensional surface-localized states on repulsive or attractive areas of the surface, and one should thus be as common as the other.
- 出版日期2007-10
