Abstract
Submonolayer coverages of Ag on Ge(111) have been studied under ultra-high vacuum using STM. Atomically resolved images of the (root 33 x root 33)R30 degrees reconstruction have been obtained. The images obtained from the 4 x4 structure are strongly dependent upon the bias voltage polarity, indicating a significant influence from electronic effects. A new model is proposed which has the reconstruction occurring within the top bi-layer of an unreconstructed Ge(111) surface. STM images of the (root 33 x root 33)R30 degrees reconstruction show a structure very similar to that obtained for Ag/Si(111), indicating that the surface is a honeycomb-chained-trimer structure. Images have also been obtained of 3 x 1 and 5 x 1 regions and possible models for these structures are proposed. (C) 1998 Elsevier Science B.V.
| Original language | English |
|---|---|
| Pages (from-to) | 91-104 |
| Number of pages | 14 |
| Journal | Surface Science |
| Volume | 398 |
| Issue number | 1-2 |
| Publication status | Published - 10 Feb 1998 |
Keywords
- adatoms
- germanium
- low-index single crystal surfaces
- metal-semiconductor interfaces
- scanning tunnelling microscopy
- silver
- surface relaxation and reconstruction
- SCANNING-TUNNELING-MICROSCOPY
- X-RAY-DIFFRACTION
- INDUCED SI(111)3X1 RECONSTRUCTION
- ENERGY-ELECTRON DIFFRACTION
- SURFACE-STRUCTURE
- SI(111)-SQUARE-ROOT-3X-SQUARE-ROOT-3-AG SURFACE
- SQUARE-ROOT-3-AG SURFACE
- ATOMIC GEOMETRY
- INITIAL GROWTH
- SILVER