par Wintterlin, Joost;Trost, Johannes;Schuster, Rolf;Eichler, Andreas;McEwen, Jean-Sabin 
Référence Physical Review Letters, 96, 16, page (166102)
Publication Publié, 2006-04-26

Référence Physical Review Letters, 96, 16, page (166102)
Publication Publié, 2006-04-26
Article révisé par les pairs
Résumé : | Equilibrium fluctuations of islands of adsorbed O atoms on Ru(0001) were investigated by scanning tunneling microscopy (STM), density functional theory calculations (DFT) and Monte Carlo (MC) simulations. Very ramified (2×2)-O islands were observed by high-speed STM that point to complex interactions between the O atoms. The DFT calculations show that, in addition to pairwise attractive interactions between third-nearest neighbors, a repulsive three-body interaction exists between these. MC simulations that include three-body interactions reproduce the observed ordering behavior. |