Open AccessA ARUPS INVESTIGATION OF TWO SURFACE SUPERSTRU-CTURES (4×1)-O AND (2×2)-S ON VANADIUM(001) SURFACES
Author(s) -
许掌龙,
刘古,
季振国,
周小霞
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.311
Subject(s) - vanadium , adsorption , angle resolved photoemission spectroscopy , materials science , oxygen , surface (topology) , symmetry (geometry) , surface energy , oxygen atom , condensed matter physics , chemistry , electronic structure , physics , molecule , metallurgy , geometry , mathematics , organic chemistry , composite material
Two surface superstructures (4×1)-O and (2×2)-S, induced respectively by oxygen and sulphur segregation on the V(001) surface, are studied in detail by ARVPS. The energy levels and symmetry of the adsorbate surface states derived from S- and O-ordered adsorbate over-layers are determined. Experimental evidence shows that the adsorption sites of oxygen on V(001) surface are four-fold hollow sites. All the experimental results consist with theoretical calculations, and are similar to that for oxygen on Ni(001) and Cr(001) surfaces.