✦ LIBER ✦
Role of phonons and electron—hole pairs in hydrogen diffusion on a corrugated metal surface
✍ Scribed by Göran Wahnström
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 580 KB
- Volume
- 163
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The possibility of correlated jumps in hydrogen self-diffusion on the Ni (00 I ) surface has been studied numerically at T= 2 50 K. It is found that excitations of electron-hole pairs among the conduction electrons are the dominating mechanism for energy dissipation in the present situation. Correlated Jumps as well as recrossing events are observed, indicating that transition state theory is erroneous. The hydrogen atom is assumed to move classically and the results are found consistent with recent diffusion experiments using the laser induced desorption technique.