Dynamics of surface migration in the weak corrugation regime |
| |
Authors: | Barth Brune Fischer Weckesser Kern |
| |
Institution: | Institut de Physique Experimentale, Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne, Switzerland. |
| |
Abstract: | We report a systematic study for metal-on-metal surface migration in the weak corrugation regime, i.e., with migration barriers falling below approximately 100 meV. The migration characteristics are elucidated by variable-temperature scanning tunneling microscopy observations in the 50-200 K temperature range, which are analyzed by means of nucleation theory. The results demonstrate that, upon entering the weak corrugation regime, the dynamics of the systems are characterized by increasingly reduced effective preexponential factors, while Arrhenius behavior prevails. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|