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Au induced faceting in XPEEM

F.-J. Meyer zu Heringdorf, Th. Schmidt, S. Heun, R. Hild, P. Zahl, B. Ressel, E. Bauer, and M. Horn-von Hoegen

(click on the image to pop up a larger view of the instrument)


Deposition of Gold on a 4 vicinal substrate triggers a transformation of the initially double stepped surface towards a faceted surface. The structures formed by this transition are huge and the terraces and facets can easily reach widths of several m and lenghts of a few mm. With soft X-ray photoemission spectromicroscopy it is possible to follow the faceting in terms of the local Au coverage. In the movie, which was recorded using one of the Au 4f photoemission corelevels, the brightness corresponds the Au coverage. In the beginning, Si(001) terraces collect all the available Gold on the surface. Only after the faceting is complete, the Au coverage on the faceted areas increases, finally resulting in a homogeniously Au-covered surface.
 
Authors: F.-J. Meyer zu Heringdorf, Th. Schmidt, S. Heun, R. Hild, P. Zahl, B. Ressel, E. Bauer, and M. Horn-von Hoegen
Affiliation: The movie was recorded using the SPE-LEEM at the Synchrotron ELETTRA, Trieste
Website: www.elettra.trieste.it
Publication: Phys. Rev. Lett. 86, 5088 (2001)


 
 

University of Duisburg-Essen | AG Horn-von Hoegen


 
 



Au (5x3.2) Reconstruction Domains grown on Si(111). Courtesy of F. Meyer zu Heringdorf and R. Tromp, IBM.


Growth of Lead on Cu(111). Courtesy of Gary Kellog, Sandia



PEEM Images of Pentacene Islands on Si. Courtesy of F. Meyer zu Heringdorf and R. Tromp, IBM