Field and temperature dependence of the directional walk of single adsorbed W atoms on the W(110) plane

作者：S. C. Wang, Tien Tzou Tsong · 发表于：Physical review. B, Condensed matter · 年份：1982 · DOI：10.1103/physrevb.26.6470 · 被引用次数：96 · 研究领域：Cold Atom Physics and Bose-Einstein Condensates、Molecular Junctions and Nanostructures、Surface and Thin Film Phenomena

When an adsorbed atom is subjected to a driving force at a diffusion temperature, it will perform asymmetric random walks. The driving force can be produced by an applied nonuniform high electric field. We report here a measurement of the field and temperature dependences of the drifting velocity of single W atoms on the W(110) plane. The dependences are found to agree well with an earlier theoretical model. From these data, the surface-induced dipole moment and the effective polarizability of the W adatoms can also be derived; they are found to be 0.97 debye and 14.4 ${\mathrm{\AA{}}}^{3}$, respectively. These values agree within statistical errors with other existing experimental and theoretical data.