Confined Shockley surface states on the (111) facets of gold clusters -: art. no. 166801

被引：39

作者：

Barke, I ^{[1
]}

Hövel, H ^{[1
]}

机构：

[1] Univ Dortmund, D-44221 Dortmund, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.90.166801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Combining low-temperature scanning tunneling microscopy and spectroscopy with high-resolution ultraviolet photoemission, we have revealed a confined Shockley surface state on the (111) facets of gold clusters with about N=10(4) atoms grown in nanopits on highly oriented graphite. With tunneling spectroscopy, we observed energy dependent nodal patterns in the dI/dV maps, which are in quantitative agreement with the two-dimensional confinement of the surface state within the hexagonal facet area. The results indicate that the lattice of the ionic cores influences the electronic properties of the clusters significantly.

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