Surface structure and local bonding on the Si 111/–Ce surface

We used scanning tunnelling microscopy STM.and photoelectron spectroscopy PES.to study the cerium-induced 3=2.surface reconstruction of cerium Ce.on Si 111.. Comparison with similar rare-earth-metal-induced low-coverage reconstructions on the Si 111.surface reveals a similar nature of the chemical bond independent of the valence of the rare earth metal. q2000 Elsevier Science B.V. All rights reserved.