Reflection anisotropy spectroscopy (RAS) studies are reported of Si(111)-5x2-Au structures grown on substrates with different offcuts and step densities. Such substrates produce a predominant domain on the (111) terrace that would otherwise produce a negligible RAS signal, due to domain averaging. Changes in the RAS spectra with offcut angle are observed in the 1 to 3 eV region, where Au-induced structures appear. Results from offcuts towards [(11) over bar2] of 2 degrees, 3 degrees, 9.5 degrees, and -4 degrees are presented. The variation in the RAS spectra is consistent with different populations of single- and double-chain gold structures formed in the region of the steps.
|Publication status||Published - 2008|
|Event||7th International Conference on Optics of Surfaces and Interfaces - Jackson Hole, United States|
Duration: 15 Jul 2007 → 20 Jul 2007
|Conference||7th International Conference on Optics of Surfaces and Interfaces|
|Period||15/07/07 → 20/07/07|
- reflectance anisotropy
- step formations