Research Papers in Physics and Astronomy

 

Date of this Version

1-19-2008

Comments

Published in Applied Surface Science (2008); doi:10.1016/j.apsusc.2008.01.064. Copyright © 2008 Elsevier B.V. Used by permission. http://www.sciencedirect.com/science/journal/01694332

Abstract

The adsorption of two very different adsorbates, gold and oxygen, induce the formation of a (3 × 1) surface structure on both W(1 1 2) and Mo(1 1 2). In spite of similar adsorbate unit cells, the surface electronic structure, derived from photoemission, exhibits pronounced differences for the two adsorbates. Indeed, both experiment and simulations indicate substantial changes in electronic structures of (1 × 1) and (3 × 1) gold overlayers supported by highly anisotropic (1 1 2) plane. We speculate that (3 × 1) is a favored periodicity in the atomic rearrangement of the (1 1 2) surfaces of molybdenum and tungsten due in part as a result of the initial state band structure of these surfaces.

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