Physics
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Item Summary Abstract: Relationship between many-parameter lattice gas systems and simpler models: Easy approximations for Tc(AIP, 1984) Bartelt, N. C.; Einstein, Theodore L.; Williams, Ellen D.Item Electron-induced extended-fine-structure measurements of thin-film growth and reaction(American Physical Society, 1987) Idzerda, Y. U.; Williams, Ellen D.; Einstein, Theodore L.; Park, R. L.The application of two electron-beam-induced extended-fine-structure (EFS) techniques (surface extended energy-loss fine structure (SEELFS) and extended appearance-potential fine structure (EAPFS)) to the study of thin films has been demonstrated by measurements on three well-characterized compositional phases of titanium deposited on Si(111).Item Reaction and structure of Ti on Si probed by surface extended energy?loss fine structure and extended appearance potential fine structure(AIP, 1987) Idzerda, Y. U.; Williams, Ellen D.; Einstein, Theodore L.; Park, R. L.Item Two-dimensional ordering of chlorine on Ag(100)(American Physical Society, 1985) Taylor, David E.; Williams, Ellen D.; Park, Robert L.; Bartelt, N. C.; Einstein, Theodore L.Chlorine adsorption on Ag(100) saturates at (1/2) monolayer (ML) in a c(2x2) structure. Desorption occurs above 650 K without disordering. The sticking coefficient remains constant to within 0.05 ML of saturation, consistent with the existence of a highly mobile precursor to adsorption. The c(2x2) structure forms at a critical coverage of 0.394+-0.007 ML at room temperature. This is slightly higher than the critical coverage of the hard-square model (0.368 ML), suggesting the influence of further-neighbor interactions.