Bonding Configurations and Collective Patterns of Ge Atoms Adsorbed on Si(111)-7x7

Details Bonding Configurations and Collective Patterns of Ge Atoms Adsorbed on Si(111)-7x7 Bonding Configurations and Collective Patterns of Ge Atoms Adsorbed on Si(111)-7x7

2005-02-14

arxiv.org/abs/cond-mat/0502342v1

Phys. Rev. Lett. 94, 106101 (2005).

Physics

Condensed Matter

Materials Science

RevTex4, 4 pages, 4 figures, Fig. 2 of high quality available upon request, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.94.106101

We report scanning tunneling microscopy observations of Ge deposited on the Si(111)-7x7 surface for a sequence of sub-monolayer coverages. We demonstrate that Ge atoms replace so-called Si adatoms. Initially, the replacements are random, but distinct patterns emerge and evolve with increasing coverage, till small islands begin to form. Corner adatom sites in the faulted half unit cells are preferred. First-principles density functional calculations find that adatom substitution competes energetically with a high-coordination bridge site, but atoms occupying the latter sites are highly mobile. Thus, the observed structures are indeed more thermodynamically stable.

Affiliated with

Also associated with

No associations

Rating

Bonding Configurations and Collective Patterns of Ge Atoms Adsorbed on Si(111)-7x7 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Bonding Configurations and Collective Patterns of Ge Atoms Adsorbed on Si(111)-7x7, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bonding Configurations and Collective Patterns of Ge Atoms Adsorbed on Si(111)-7x7 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-242200