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Numrering	Referens	Omslagsbild	Hitta
1.	Kohler, L, et al. (författare) High-coverage oxygen structures on Rh(111): Adsorbate repulsion and site preference is not enough 2004 Ingår i: Physical Review Letters. - 1079-7114. ; 93:26 Tidskriftsartikel (refereegranskat)abstract A new O induced structure on Rh(111) displaying a (2root3 x 2root3)R30degrees periodicity with an oxygen coverage of 2/3 has been studied by high resolution core level spectroscopy, scanning tunneling microscopy, and density functional theory. Although O favors fcc hollow sites in all other known phases, it occupies both fcc and hcp sites in this structure, which cannot be explained by pairwise adsorbate repulsion only. Both the (22root3 x 2root3)R30degrees and (2x2)-3O structures also exemplify that density-of-states contrast can lead to oxygen adatoms appearing as protrusions in scanning tunneling microscopy images.

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