| AVS 57th International Symposium & Exhibition | |
| Surface Science | Tuesday Sessions |
| Session SS-TuP |
| Session: | Surface Science Poster Session |
| Presenter: | A. Belianinov, Iowa State University & Ames Laboratory U.S. D.O.E. |
| Correspondent: | Click to Email |
It is well-known that conversion of Si(111)-(7x7) into the (√3x√3)R30o phase of adsorbed Ag requires a change in the Si density, and causes formation of islands and holes at the surface. By mass balance, the ratio of areas of islands and holes (RIH) should be approximately 1. However, we find that the ratio is significantly higher, depending on preparation conditions. A possible explanation would be that there are different types of (√3x√3)R30o structures. However, neither scanning tunneling microscopy nor density functional theory (implemented as a genetic algorithm search) supports this explanation. The reason for the unexpectedly high values of RIH is unknown.
P.A.C.S. Numbers 68.37.Ef, 68.55.-a, 81.15.Aa, 68.47