title: Scattering of surface states at step edges in nanostripe arrays.
abstract: Surface states of noble metal surfaces split into Ag-like and Cu-like subbands in stepped Ag/Cu nanostripe arrays. The latter self-assemble by depositing Ag on vicinal Cu(111). Ag-like states scatter at nude step edges in Ag stripes, leading to umklapp bands, quantum size effects, and peak broadening. By contrast, Ag stripe boundaries become transparent to Cu-like states, which display band dispersion as in flat Cu(111). We find a linear relationship between the quantum size shift and peak broadening that applies in a variety of stepped systems, revealing the complex nature of step barrier potentials.
authors.affiliation: Donostia International Physics Center, Paseo Manuel Lardizabal 4, E-20018 Donostia-San Sebastián, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Schiller
authors.forename: M
authors.initials: M
authors.lastname: Ruiz-Osés
authors.forename: J
authors.initials: J
authors.lastname: Cordón
authors.forename: J E
authors.initials: JE
authors.lastname: Ortega