One-dimensional magnetism of Rh chains on the Ag(001) surface

The electronic and magnetic properties of one-dimensional Rh structures dep osited on Ag(001) surfaces are investigated. The [010] and [110] chain dire ctions with Rh atoms at ideal adatom positions are considered. A semiempiri cal tight-binding method in a chain orbital representation is implemented t o exploit the translational symmetry along the chain directions. All struct ures considered display a sizable magnetic moment for the Rh atoms in the c hains. A nonconventional magnetic behavior due to interchain interactions i s observed. The results are in a good agreement with Korringa-Kohn-Rostoker calculations for small supported clusters.