Publications in Scientific Journals:
C. Klein, A. Eichler, E.L.D. Hebenstreit, G. Pauer, R. Koller, A. Winkler, M. Schmid, P. Varga:
"When Scanning Tunneling Microscopy Gets the Wrong Adsorption Site: H on Rh(100)";
Physical Review Letters,
90
(2003),
17;
176101-1
- 176101-4.
English abstract:
At low tunneling resistance, scanning tunneling microscopy (STM) images of a Rh(100) surface with adsorbed hydrogen reproducibly show protrusions in all bridge
sites of the surface, leading to a naive interpretation of all bridge sites being occupied with H atoms. Using quantitative low-energy electron diffraction (LEED) and
temperature programmed desorption we find a much lower H coverage, with most H atoms in fourfold hollow sites. Density functional theory (DFT) calculations
show that the STM result is due to the influence of the tip, attracting the mobile H atoms into bridge sites. This demonstrates that STM images of highly mobile
adsorbates can be strongly misleading and underlines the importance of additional analysis techniques
Electronic version of the publication:
http://www.iap.tuwien.ac.at/www/SURFACE/pdf/A/A2003E03.pdf
Created from the Publication Database of the Vienna University of Technology.