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Ding, H. F., Stepanyuk, V. S., Ignatiev, P. A., Negulyaev, N. N., Niebergall, L., Wasniowska, M., Gao, C. L., Bruno, P., Kirschner, J.

Self-organized long-period adatom strings on stepped metal surfaces: Scanning tunneling microscopy, ab initio calculations, and kinetic Monte Carlo simulations
Physical Review B 76, (3),pp 033409/1-4 (2007)
Combined experimental and ab initio studies show that the surface-state-mediated adatom-step and adatom-adatom interactions are the driving forces for the self-organization of Fe adatoms on vicinal Cu(111) surfaces at low temperatures. Our scanning tunneling microscope observations and the kinetic Monte Carlo simulations reveal the self-organization of Fe adatoms into atomic strings. The interatomic separation (1.2 nm) in the strings is not determined by the nearest-neighbor distance (0.26 nm) of the Cu atoms along the step edge but by the wavelength of the surface-state charge density oscillations.

TH-2007-12