Abstract
We have determined the atomic structure of the Si(111)-(√7 × √7)Co surface using scanning tunneling microscopy and ion scattering. The unit cell contains one surface substitutional cobalt atom centered under a 6 silicon adatom cluster. High-temperature annealing produces a low density lattice gas of these ringlike clusters, giving rise to an "impurity stablized 1 × 1" structure. They occur for several other transition metals, suggesting a stable, universal, silicide related structure.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1224-1227 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 69 |
| Issue number | 8 |
| DOIs | |
| State | Published - 1992 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy