Relaxation and thermal expansion of Ru() between 300 and 1870 K and the influence of hydrogen
| Autor: | Arthur P. Baddorf, V. Jahns, D. M. Zehner, Doon Gibbs, H. Zajonz |
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| Rok vydání: | 2002 |
| Předmět: |
Diffraction
Hydrogen Relaxation (NMR) chemistry.chemical_element Surfaces and Interfaces Hydrogen atom Condensed Matter Physics Molecular physics Thermal expansion Surfaces Coatings and Films Crystallography chemistry Transition metal Electron diffraction Ab initio quantum chemistry methods Materials Chemistry |
| Zdroj: | Surface Science. 498:74-82 |
| ISSN: | 0039-6028 |
| Popis: | The surface structure of Ru(0 0 0 1) has been studied between 300 and 1870 K using X-ray diffraction. At 300 K, the outermost layer is contracted by 2.2(4)%, in agreement with the value determined by low-energy electron diffraction studies, but about half that predicted by ab initio calculations. H-adsorption appears to introduce disorder through an increased surface Debye–Waller factor and an increased step density, but does not significantly alter the interlayer spacing. Temperature-dependent studies of the clean surface structure indicate a thermal expansion of the first three interlayer distances that is slightly smaller than that of the bulk, accompanied by increasing vibrational motion comparable to that of the bulk. |
| Databáze: | OpenAIRE |
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