ONE-DIMENSIONAL BAND STRUCTURES - RARE-GASES ON PT(110)1X2

The formation of one-dimensional band structures has been observed for Kr and Xe adsorbed on the reconstructed Pt(110)1 x 2 surface at submo nolayer coverages: The p(3/2) and p(1/2) valence levels of both adsorb ates exhibit significant dispersion for the [1 (1) over bar 0] directi on, i.e., along the densely packed substrate rows, but no dispersion i s observed for [001], i.e., perpendicular to the rows. The observed k- space periodicities and tight-binding band-structure calculations impl y that both Kr and Xe are adsorbed in densely packed linear chains on the reconstructed Pt(110)1 x 2 surface, with negligible interaction be tween neighboring rows.