Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.104: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
Electronic structure of oxygen/W(110): photoemission study — Martin Weser1, Alexander Generalov1,2, Karsten Horn1, and •Yuriy Dedkov1 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — 2St. Petersburg State University, Russia
The study of oxygen interaction with W(110) has been a focus of many surface-science studies. Thermodinamics of the oxygen adlayer, including the phase diagram and critical behavior [1], have been investigated in series of LEED studies [2] and in later STM study [3]. Because of the relative simplicity in adsorption behavior, the W(110) surface provides an ideal surface to study the electronic structure of the initial stages of the interaction of oxygen with tungsten metal, and this system can be considered as a model for the consideration of catalysis effects on the heavy d-metal surfaces. Here we present the results of angle-resolved photoemission studies of the clean and oxidized W(110) surface. The both systems are examined via analysis of the electron dispersions at the particular regions of the Brillouin zone and the effect of the oxygen chemisorption on the electronic structure of W(110) is discussed.
[1] G. C. Wang et al., J. Chem. Phys. 69, 479 (1978).
[2] M. C. Tringides, Phys. Rev. Lett. 65, 1372 (1990).
[3] K. E. Johnson et al., Phys. Rev. Lett. 71, 1055 (1993).