A feasibility study of intensity versus energy analysis as a means of testing low energy electron diffraction techniques on the Au(111) crystal
Open Access
Author:
Schuette, Daniel
Area of Honors:
Physics
Degree:
Bachelor of Science
Document Type:
Thesis
Thesis Supervisors:
Renee Denise Diehl, Thesis Supervisor Renee Denise Diehl, Thesis Supervisor Prof. Richard Wallace Robinett, Thesis Honors Advisor
Keywords:
Au(111) surface physics LEED
Abstract:
Experimental studies on the atomic arrangement of crystals are necessary in order to understand and predict the properties and interactions of the structures. The crystal of focus in this experiment, the Au(111) crystal, was chosen for its long-range order. This long periodicity approximates the structure of quasicrystals, materials of ordered structure that lack true periodicity. Using the process of Low-Energy Electron Diffraction (LEED), and comparing the results to a known crystal structure, the structure of the surface atoms can be inferred. Using the HotLEED program, the intensities of a LEED file are extracted, and the Intensity vs. Incident energy curves are analyzed. This experiment is a feasibility study of the use of HotLEED to determine the surface structure of the Au(111) crystal. It will be considered feasible if the Pendry-r factor is less than 0.2.
