ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The adsorption of hydrogen on the Co(101¯0) surface has been studied by means of helium atom scattering. In agreement with previous results, three ordered adsorbate structures have been identified at 85 K: a c(2×4)4H, a (2×1)p2mg, and a (1×2) saturation phase. The surface structures were determined from a quantitative analysis of the corresponding He-diffraction spectra. The corrugation functions derived from the calculations reveal that in the c(2×4)4H phase the hydrogen atoms from zigzag and zagzig chains along every second close-packed row of the substrate, although the kind of occupied threefold sites cannot be determined from our data. In the (2×1)p2mg phase, hydrogen atoms are found to occupy the hcp-like sites, whereas the substrate's reconstruction in the (1×2) phase is of the pairing-row type. This means that hydrogen forms analogous structures on the Co(101¯0) rather than on the structurally similar Ni(110) surface. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1311974
