Diffusion of Au atoms and (5×2) phase formation on the Si(111) (7×7) surface Z. Chvoj, Z. Chromcová and V. Cháb Eur. Phys. J. B, 76 3 (2010) 453-461 Published online: 29 June 2010 DOI: 10.1140/epjb/e2010-00204-5