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- Lee, Geunsik
- Computational Research on Electronic Structure and Transport in Condensed Materials
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Origin of unusual work function change upon forming Tl nanoclusters on Si(111)-7x7 surface
- Alternative Title
- Origin of unusual work function change upon forming Tl nanoclusters on Si(111)-7x7 surface
- Author(s)
- Hwang, C. G., Kim, N. D., Lee, Geunsik, Shin, S. Y., Uhm, S. H., Kim, H. S., Kim, J. S., Chung, J. W.
- Issued Date
- 2007-11
- Citation
- APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, v.89, no.2, pp.431 - 435
- Abstract
- We report an unusual behavior of the work function that remains unchanged while increasing the coverage (theta) of thallium (Tl) nanoclusters regularly arranged on a Si(111)-7x7 surface. Such a constant work function with increasing theta is understood in terms of a theta-dependent inter-cluster interaction that cancels the change induced by dipoles due to Tl nanoclusters. The spectral changes of Si 2p and Tl 5d(5/2) core-levels as a function of theta strongly indicates the presence of such an inter-clusters interaction, which is further supported by our theoretical calculation revealing a significant charge redistribution
- Publisher
- SPRINGER
- ISSN
- 0947-8396
- Keyword
- ALKALI, PHOTOEMISSION, ADSORPTION
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