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Si sublimation from a Si(001) surface
by K. R. Roos, K. L. Roos and F.-J. Meyer zu Heringdorf

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


During high temperature, Si sublimates from a Si(001) surface, resulting in a layer-by-layer sublimation of material. In dark-field imaging conditions it is possible to distinguish the steps via their reconstruction, i.e. one type of terraces appears bright, the other one appears dark and between bright and dark areas, there is an atomic step. Watch how the steps move over the surface due to the sublimation of material, and how they wrap around the little "pillar" that consists of a lot of steps and has an (001) oriented island on top. This pillar is also evaporating and changes its color periodically from bright to dark. The field of view of the movie is 8µm, the temperature is about 1000°C.
 
Authors: K. R. Roos, K. L. Roos and F.-J. Meyer zu Heringdorf
Affiliation:

The movie was recorded using the IBM LEEM-I at the Universität of Duisburg-Essen

Website: www.iep.physik.uni-essen.de/hvh
Publication: unpublished


 
 

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