The gold and oxygen (3 × 1) structures on W(112)

Ihor Ketsman, University of Nebraska - Lincoln
N. Lozova, Louisiana State University, CAMD, 6980 Jefferson Highway, 70806 Baton Rouge, LA
John Scott, Louisiana State University, CAMD, 6980 Jefferson Highway, 70806 Baton Rouge, LA
Peter Dowben, University of Nebraska - Lincoln
I. N. Yakovin, Institute of Physics of National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev 03028, Ukraine
S. M. Zuber, University of Wroclaw, pl. M. Borna 9, Wroclaw, Poland

Document Type Article

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.