The diffusion of W adatoms on W(110) was re-examined by using field ion microscopy. The diffusivity was in good agreement with previous results, and exhibited no unusual features. From observations of the distribution of displacements, corrected for diffusion during temperature transients, it was possible - for the first time – to measure the temperature dependence of rates for nearest-neighbor and double jumps, as well as for vertical and horizontal transitions. Activation energies and frequency factors for all the long jumps were significantly larger than for single jumps. A simple model could account for the observations.

Long Jump Rates in Surface Diffusion - W on W(110). G.Antczak, G.Ehrlich: Physical Review Letters, 2004, 92[16], 166105 (4pp)