テンソルLEEDによる構造決定

概要

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Precise knowledge about the atomic geometries of surfaces is the basis for understanding surface properties such as electronic structure and adsorption processes of molecules.<BR>The dynamic analysis of intensity vs. energy (IV) curves of low-energy electron diffraction is the most powerful method for determining the surface geometries of crystal surfaces.<BR>The disadvantage of this method is that it requires a rather long CPU time to calculate IV curves. When we treat complex surface structures with many atoms in a surface unit cell, we must carry out calculations using many possible surface structural models while changing their structural parameters, and compare the calculated spectra with experimental ones.<BR>The recently developed tensor LEED method drastically reduces these timeconsuming calculations. This paper briefly reports on the characteristic features and advantages of tensor LEED compared to the canventional method.<BR>Some examples of the application of this mathod to the determination of surface structures are also reported.
日本結晶学会の論文