Kinetic Monte Carlo investigation of Xe adsorption and desorption on Pt(111) and Pt(997)

Physical Review B - Condensed Matter and Materials Physics

Volumn 65, Issue 16, 2002, Pages 1-12

  Lehner, B ^a   Hohage, M ^a   Zeppenfeld, P ^a  

^a JOHANNES KEPLER UNIVERSITY LINZ   (Austria)

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Indexed keywords

EID: 84867268792     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.65.165407     Document Type: Article

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58. The major argument in Ref. 7 to propose the bottom of the step edge to be occupied first was the overall intensity of the specular He intensity and the shift of the diffraction satellites towards larger exit angles after completion of the first Xe row. In our understanding, both observations are quite compatible with adsorption on top of the step edges. First, the pronounced intensity drop of the specular peak during formation of the first row indicates an exposed adsorption site on the upper terrace rather than within the “shadow” at the bottom of the diffusely scattering step edge. Second, one would expect a bending towards larger exit angles of the trajectories of those He atoms which after being diffracted from the flat part of the terraces experience the attractive potential of a Xe atom located on top of the step edge during their way out.