AVS 46th International Symposium
    Surface Science Division Friday Sessions
       Session SS2-FrM

Paper SS2-FrM4
Morphology and Electronic Structure of 1D Ca-induced Rows on the Si(111) Surface

Friday, October 29, 1999, 9:20 am, Room 607

Session: Adsorption on Metals and Silicon
Presenter: M.S. Turner, Virginia Commonwealth University
Authors: M.S. Turner, Virginia Commonwealth University
K.M. Jones, Virginia Commonwealth University
A.A. Baski, Virginia Commonwealth University
J.A. Carlisle, Virginia Commonwealth University
Correspondent: Click to Email
Deposition of highly reactive alkaline-earth adsorbates (Ca, Sr, Ba) onto semiconductor substrates leads to reconstructions which are row-like in nature. The Ca/Si(111) system has been studied using RHEED, STM and synchrotron radiation photoemission. For Ca coverages less than 0.5 ML, a series of odd-order nx1 (n=3,5,7...)reconstructions have been observed. The most stable of these is a (3x1) phase that occurs at 0.33 ML. Various models have been proposed for the general metal/Si(111)-(3x1) system, and we discuss the accuracy of these models as they apply to this system.@footnote 1@ In particular, we discuss how well the models can be altered to account for the higher-order reconstructions that are observed at higher Ca coverages, and for commonly observed defect structures in the (3x1) phase. These objectives are accomplished through comparison between the surface morphologies observed in STM images and the electronic structure of the different surface phases observed in high-resolution core-level and valence-band photoemission. @FootnoteText@ @footnote 1@S.C. Erwin and H.H. Weitering, Phys. Rev. Lett. 81, 2296 (1998).