Cluster formation in the adsorbate-induced reconstruction of the O/Mo(001) surface
I K Robinson; D -M Dmilgies; P J Eng; I K Robinson; AT&T Bell Labs., Murray Hill, NJ, USA; D -M Dmilgies; AT&T Bell Labs., Murray Hill, NJ, USA; P J Eng; AT&T Bell Labs., Murray Hill, NJ, USA
Журнал:
Journal of Physics: Condensed Matter
Дата:
1992-07-06
Аннотация:
An X-ray crystallographic structure determination has been carried out for the square root 5* square root 5 Mo(001)/O surface. This is the penultimate structure in the sequence of ordered states obtained by high-temperature desorption from the oxidized surface. The oxygen induces a reconstruction with one Mo atom missing from the surface unit cell and O atoms occupying the exposed threefold sites. The O sits asymmetrically in these sites and induces a rotational distortion of the remaining top layer Mo atoms, which cluster together. The asymmetry can be attributed to partial direct bond formation between surface Mo-O clusters, since apparently this is not mediated by any significant second-layer displacements.
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