Edge effects on low temperature surface adsorption phases and phase transitions on finite-width square terraces.

A transfer matrix approach is used to conduct a thorough investigation of all possible adsorbate configurations or phases on terraces of various widths M including edge effects, and limited to first- and second-neighbor adsorbate‚Äďadsorbate interactions. Figures showing the configurations that occur within this model are presented for M ¬ľ 3 and 4, and detailed tables provide the phase sequences corresponding to all possible ranges of values for the interaction energies. Higher width terrace results have also been completed and are available upon request. As such, the model calculations provide a useful reference for experimentalists leading to predictions of the values of the interaction energies from the observed phase sequence and the conditions prevailing at the transition between phases. A few experimental results are interpreted using the model. One suggests specific experiments, which would make the observations more amenable to direct comparison with the calculations.

Main Author: Phares, Alain J.
Other Authors: Wunderlich, Francis J.
Format: Villanova Faculty Authorship
Language: English
Published: 2003
Online Access: http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:178520