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Lee, Geunsik
Electronic Structure and Transport in Condensed Materials
Research Interests
  • open quantum system, non-equilibrium electron transport
  • electron correlation, dynamical mean field theory
  • 2D materials, metal complexes

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Origin of unusual work function change upon forming Tl nanoclusters on Si(111)-7x7 surface

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Title
Origin of unusual work function change upon forming Tl nanoclusters on Si(111)-7x7 surface
Other Titles
Origin of unusual work function change upon forming Tl nanoclusters on Si(111)-7x7 surface
Author
Hwang, C. G.Kim, N. D.Lee, GeunsikShin, S. Y.Uhm, S. H.Kim, H. S.Kim, J. S.Chung, J. W.
Keywords
ALKALI; PHOTOEMISSION; ADSORPTION
Issue Date
2007-11
Publisher
SPRINGER
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
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DOI
10.1007/s00339-007-4238-8
ISSN
0947-8396
Appears in Collections:
PHY_Journal Papers
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