The gold and oxygen (3 × 1) structures on W(1 1 2)

• Published in: Applied surface science Vol. 254; no. 14; pp. 4326 - 4331
• Main Authors: Losovyj, Ya.B., Ketsman, Ihor, Lozova, N., Scott, John, Dowben, P.A., Yakovkin, I.N., Zuber, S.M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 15-05-2008; Elsevier Science
• Subjects: Adsorption; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Electron and ion emission by liquids and solids; impact phenomena; Electron diffraction and scattering; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Gold; Low-energy electron diffraction (leed) and reflection high-energy electron diffraction (rheed); Oxygen; Photoemission; Photoemission and photoelectron spectra; Physics; Solid surfaces and solid-solid interfaces; Structure of solids and liquids; crystallography; Surface and interface electron states; Surface electronic structure of W; Surface states, band structure, electron density of states; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Synchrotron radiation; Gold; 68.35.B; Oxygen; 68.40-h; Adsorption; Photoemission; 31.50.Gh; 68.37.Ef; Surface electronic structure of W; Synchrotron radiation; Band structure; Molybdenum; Surface structure; Unit cell; Electronic structure; Simulation; Transition elements; Tungsten; Adsorbed state; Overlayers; LEED
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2008.01.064

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.