Simulation of LEED patterns from complex surface structures

✍ Scribed by N. Panagiotides; D.R. Batchelor; D.A. King

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 545 KB
• Volume: 177
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(91)85077-a

✦ Synopsis

A computer simulation technique has been developed which allows a comparison to be made between the LEED pattern from any model structure and an experimental LEED pakrn. The model structure is set up as a layered array, each array consisting of about 30 x 30 scatterers. Two or more layers are included, as necessary, and there arc no constraints on the selvedge structure. Incommensurate, domain wall and disordered systems can be readily modelkd. The computer program simulates a scattered electron wavctield composed of both single and double scattering contributions. Electron intensities are calculated in a userdetermined portion of the two-dimensional k-space. The program is demonstrated by application to several adsorbate-substrate systems.