Origin of unusual work function change upon forming Tl nanoclusters on Si(111)-7x7 surface
SCIE
SCOPUS
- Title
- Origin of unusual work function change upon forming Tl nanoclusters on Si(111)-7x7 surface
- Authors
- Hwang, CG; Kim, ND; Lee, G; Shin, SY; Uhm, SH; Kim, H; Kim, JS; Chung, JW
- Date Issued
- 2007-11
- Publisher
- SPRINGER
- 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.
- Keywords
- ALKALI; PHOTOEMISSION; ADSORPTION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23205
- DOI
- 10.1007/S00339-007-4
- ISSN
- 0947-8396
- Article Type
- Article
- Citation
- APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, vol. 89, no. 2, page. 431 - 435, 2007-11
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