Self-diffusion of one-dimensional clusters on fcc ( 110 ) ( 2 × 1 ) surfaces of Pt, Ag, Cu, and Ni

摘要: We theoretically investigate self-diffusion processes of one-dimensional adatom clusters three to five atoms on reconstructed $(110)(2\ifmmode\times\else\texttimes\fi{}1)$ surfaces Pt, Ag, Cu, and Ni. consider single the as well collective when additional are present in neighboring rows surface. For several diffusion mechanisms configurations we calculate activation barriers preexponential factors from local vibrational density states. The trends for same four metals, indicating that geometry rough, anisotropic surface plays a key role. Prefactors found be usual range ${10}^{\ensuremath{-}3} {\mathrm{cm}}^{2}/\mathrm{s}$. Additional lead small lowering barriers, while prefactors do not change significantly.