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SSL Seminar Series 2001 No. 1
Title: Theoretical Methods used in the simulation of LEED I-V
spectra
Speaker: Mr. Sun Yiyang
Date: 5th January 2001, Friday
Time: 5:00-6:00pm
Venue: Physics Resource Room S13, 02-16
Abstract
Low Energy Electron Diffraction (LEED) is regarded as one of the most
precise means to determine the relaxation of single crystal surfaces
and adatom positions on these surfaces. The determination process
is conducted through simulating experimental I-V spectra by theoretical
calculations on trial structures to find the best-fit one. This talk
will briefly introduce the main methods used in this simulation process,
including the l-space (Matrix Inversion, RSP), k-space (Layer Doubling,
RFS) and combined space methods. In addition, best-fit searching algorithms,
including local searching and global searching, are introduced. |
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