Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Large Unit Cell Superstructures on Hexagonal SiC-Sufaces Studied by LEED, AES and STM

There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Starke, U., Franke, M., Bernhardt, J., Schardt, J., Reuter, K., & Heinz, k. (1998). Large Unit Cell Superstructures on Hexagonal SiC-Sufaces Studied by LEED, AES and STM. Materials Science Forum, 264-268, 321-326. doi:10.4028/www.scientific.net/MSF.264-268.321.

Cite as: https://hdl.handle.net/21.11116/0000-000A-F589-7
The atomic structure of reconstruction phases on silicon rich hexagonal SiC surfaces was investigated using low-energy electron diffraction (LEER), scanning tunneling microscopy (STM) and Auger electron spectroscopy (AES). A silicon adatom geometry is favored for the (√3x√3)R30° phase in agreement with recent total energy calculations. On the (3x3) periodic surface a novel type of reconstruction mechanism is observed which is characterized by a single tetrahedral adatom cluster on top of a full silicon adlayer. A twist motion is induced in both adcluster and adlayer, resulting in clover-like pentamer rings which provide a planar three-fold bonded coordination within the adlayer. The (6√3x6√3)R30° structure which often displays a quasi "6x6" corrugation in STM contains three atomic rings per unit cell with slightly different size.