Anisotropic atomic motions in structural analysis by low energy electron diffraction

Over, Herbert; Moritz, Wolfgang and Ertl, Gerhard (1993): Anisotropic atomic motions in structural analysis by low energy electron diffraction. In: Physical Review Letters, Vol. 70, No. 3: pp. 315-318

Abstract

The structure of the √3 × √3 R30° overlayer formed by CO molecules adsorbed on a Ru(0001) was analyzed by low energy electron diffraction. Anisotropic atomic motions under the influence of thermal excitation were taken into account by adopting the concept of split positions. Apart from considerable improvement in the structural refinement this technique provides information about dynamic processes. In particular, the molecular axis of the CO molecules was found to be tilted on the average by (12±3° at 150 K, which is attributed to excitation of the bending mode vibration (i.e., frustrated translation).

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences > Crystallography and Materials Science
• Subjects: 500 Science > 550 Earth sciences and geology
• Language: English